Renovo 5000-watt inverter
Contents
1. POWER TECHNOLOGY PV grid connected inverter Digiwatts RN5000US Installation Guide Installation Guide RN5000US Copyright Renovo Power Systems All rights reserved Reproduction and storage in a retrieval system or transmittal even partially of the contents of this manual is strictly forbidden without prior authorization of Renovo Power Systems All such warranties are expressly disclaimed Neither Renovo Power Systems nor its distributors or dealers shall be liable for any indirect incidental or consequential damages under any circumstance The exclusion of implied warranties may not apply in all cases under some statutes and thus the above exclusion may not apply opecifications are subject to change without prior notice We make extensive effort to make this document is complete accurate and receives timely updates Readers are cautioned however the Renovo Power Systems reserves the right to make changes without notice and shall not be responsible for any damages including indirect incidental or consequential damages caused by reliance on the material presented including but not limited to omissions typographical errors arithmetical errors or listing errors in the content material Renovo Power Systems LLC 2723 South State Street Suite 100 Ann Arbor MI 48105 Tel 855 RENOVO1 736 6861 Fax 888 810 6454 http www renovo usa com Installation Guide RN5000US 2 IMPORTANT SAFETY INSTRUCTIONS2. O G Packing list ee H jWamanycard 0 JjTestandinspeconrepott S y O Installation Guide RN5000US 22 3 AC Voltage Configuration 3 1 Opening the Digiwatts Unit Figure 3 1 Opening the Digiwatts Unit 1 Remove the four machine screws and lock washers from the housing cover and pull the cover forward smoothly 2 Remove any communication or power cables possibly connecting the front cover LCD board 3 Place the cover machine screws and lock washers aside where they will be out of your way while you are connecting wires and cables to the Digiwatts unit CAUTION Be careful not to misplace the machine screws or the lock washers as all four screws and lock washers are required to ensure that the cover is Installation Guide RN5000US 23 grounded properly and is fully sealed to the case Handle the cover carefully as even seemingly minor damage to the cover could result in an inadequate seal between the cover and the case thus allowing moisture to enter the case and damage the sensitive electronic components ics NOTICE Do not install the Digiwatts unit during periods of precipitation or high humidity gt 95 Moisture trapped within the enclosure may cause corrosion and damage to the electronic components 3 2 Locating Internal Components Figure 3 2 below illustrates the locations of the major internal components of the Digiwatts unit Refer to this illustration as needed to locat
3. The inverter complies with the requirements of Equipment and Product Safety Acts in USA and Canada Symbol for equipment grounding conductor The inverter is transformerless RN5000US 18 1 6 Installation Overview This section provides an overview of the installation process and User Manual contents Section 1 Unpacking and Inspection Provides instructions for unpacking and inspecting the Digiwatts system for shipping damage Section 2 General Use Head this manual carefully before using this product If you encounter any problem during installing or running this unit please check this manual first before contacting your local dealer or representative Many problems encountered can be solved according to the instructions inside Section 3 Mounting e Provides guidelines for the best mounting location and detailed mounting instructions to insure optimum performance e Cautions and warnings to be followed to avoid injury and or equipment damage Section 4 Wiring e Guidelines for selecting the correct wire sizes e Cautions and warnings that should be followed to avoid injury and or equipment damage e Step by step instructions for wiring the Digiwatts system to a PV array and the utility grid e Procedures for connecting optional data communication cables Section 5 Commissioning Commissioning involves applying DC input power to the Digiwatts unit and resolving any problems that occur Section 6 Displays and Messages Provides sc
4. Installation Guide RN5000US 6 5 4 1 DC Connection Requirements esses 39 5 4 2 Connecting the DC Wires ssis eeN NANREN 43 5 5 Communication Wiring sesoss seco coco codec ocolos setate oett oco toners 43 5 6 Closing the Digiwatts UNIt ccccccccsssssseeeceeeeeeeeeesseeeeeeessseeeaeeeeeeeeeseaaas 45 6 GOMIMISSIOMING nt R 47 Y DISDIaVe alidudvie SSAC S sisi NIIT MM 49 il bEDODOrIaUOD Indicators 59 50 25 9 002290 0 0 9 0 96 toe o aUe eae qusc aca cue ooa ode des 49 7 2 Status Messages on the LCD Display ssssssesessss 50 7 3 Fault Messages on the LCD Display eeeseseseeeesssssse 52 TA CDeraurigviodes i 552225 53 25252525 299 982525 008 008 9 202625282006 atas cda tc tabat a cocbads 52 ed reeaeeujs e 53 S IAG 212 RE RE REA ERE PRES RR APR PAPA FAFA REA READER LE 53 8 2 EMMOr Message Sopena papaa 55 9 T chnical SDe6IHCallOfiS oreren areae NU E E 56 9 1 Digiwatts Wiring Diagrams ccccsseececceeeeeeeceeseeeeseeeeessaeeeeeaaaseeessaeees 56 S2 ODOCHEAUOFIS ccoctiectsacivesteepttupa captu ipei mp pim RE mE 56 9 3 TTE LME MEMES doce iR USRERE SU DUSRERU NDS E RR EU EU GREIE EUREN aus 58 9 4 Torque Values and Wire Sizes ccccsssseccccceesssececcceeseeceeeceaaseeeesssaaseeeess 58 Installation Guide RN5000US 7 1 Introduction 1 1 Validity This manual describe
5. SAVE THESE INSTRUCTIONS This manual contains important instructions for Model RNS5000US SOLAR INVERTERS It must be accurately understood and followed during installation and maintenance of the inverter The Digiwatts system is designed according to international safety standards however with all electrical and electronic equipment installation and operation must follow some preventive measures To reduce the risk of electrical shock hazards and to ensure that equipment installation and commissioning is conducted safely all instructions cautions and warnings in this Installation Guide must be closely read and followed Warnings A Warning describes a hazard to equipment or personnel It calls attention to a procedure or practice which if not correctly performed or adhered to could result in damage to or destruction of part or all of the Renovo Power equipment and or other equipment connected to the Renovo Power equipment or personal injury WARNING WARNING indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION N CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE The paragraphs highlighted by this symbol contain processes and instructions that must be rigorously understood and followed to avoid potential damage to the equipment negative results and to ensure the unit achieves optimal performance Installation Guide R
6. Digiwatts unit C Installation Guide RN5000US 11 e Dimensions and weight Figure 1 4 Dimensions of the Digiwatts unit Table 1 2 Dimensions Value RN5000US 218 8 6 032 20 9 458 18 27 59 Installation Guide RN5000US 12 1 4 Feature Overview The Digiwatts system represents state of the art technology Several key features e High reliability and safety e High efficiency e Simple installation e Quiet operation e CD Display e Powder coated die cast enclosure Operating Temperature The Digiwatts system has been equipped with a passive radiator used to maintain full power output at ambient temperatures as high as 45 C The Digiwatts system will continue to operate well beyond 45 C and de rates as needed to maintain a safe internal component temperature N NOTICE Although the Digiwatts unit can be installed where temperatures reach up to 45 C it is strongly recommend that it be installed where ambient temperature in the range of 0 40 C 1 5 Safety 1 5 1 Protection and criterion Anti Islanding Protection Islanding is a condition that can occur if the utility grid is disconnected while the Digiwatts system is operating and the remaining load is resonant at 60 Hz and matches Installation Guide RN5000US 13 the output of the Digiwatts perfectly The Digiwatts system incorporates an advanced active islanding protection algorithm to ensure that the system will not export power into a
7. LED is on the other two are off The inverter has determined that there is enough voltage from the array to operate The Digiwatts unit adjusts the voltage and current from the PV array to maximize PV output power Derating The run LED is blinking the others are off The Digiwatts is designed to operate at full rated power up to 45 C ambient The inverter will continue to operate beyond 45 C and derate as required to limit internal component temperature 7 2 Status Messages on the LCD Display Activation of the LCD Backlight The LCD backlight is activated by knocking twice on the lid The backlight shuts off automatically after 2 min Installation Guide RN5000US 50 N N LCD Display Parameters o BICI TN E 2100 0 UC o Grid 000V 00 0A Hour 0000 0h 4 Ttl 00000kWh Power 0000W PV1 000V 00 0A PV2 000V 00 0A 5 Fault OK Status Wait o Renovo Power Systems Parameter Description Table 7 1 Parameter Descriptions g nverter Model a Grid voltage and current 3 Til Accumulated energy yield of the device since installation 2 6 Hour__ Total operating hours since installation 8 PV2 jPV2inputvoltage andcurent 9 Status Operational status ofthe inverter Installation Guide RN5000US 5 7 3 Fault Messages on the LCD Display If the Status message is Stop the inverter has a fault and the specific issue will be displayed at Fault parameter location DIGIWAT
8. balanced 60 Hz resonant load while the utility is disconnected The Digiwatts system periodically injects both leading and lagging reactive current into the utility grid This method has been proven by independent test labs to effectively destabilize and disconnect from a balanced island condition PV Insulation Fault Detection Before the inverter connects to the grid the Digiwatts system will detect the isolation of PV and PV to the ground When the insulate impedance is less than 1MO the inverter will not function After the inverter is connected to the grid the system will detect the residual current If a residual current greater than 30mA is detected the Digiwatts system will shut down and display a fault condition on the LDC user interface display AC Overcurrent Protection The system will detect the AC current real time Should the AC current exceed 50 ampere the Digiwatts system will shut down and display a fault condition on the LCD user interface display Surge Protection Over voltage protection though the use of surge protection devices SPDs or surge arresters should be provided when the PV power system is installed The Digiwatts unit is not equipped with SPDs on either the PV input side or AC output side Lightning can cause damage either from a direct strike or from surges due to a nearby strike Induced surges are the more likely cause of lightning damage in the majority of installations especially in rural areas where
9. reproduce the failure If yes how Has this problem occurred in the past What were the ambient conditions when the problem occurred Installation Guide RN5000US 53 Information Regarding the PV modules e Manufacturer name and model number of the PV module e Output power of the module e Opencircuit voltage Voc of the module e Number of modules in each string If it becomes necessary to send the Digiwatts unit back to the manufacturer for service please ship it in the original packaging to avoid damage during shipping Installation Guide RN5000US 54 8 2 Error Messages If a fault occurs the Digiwatts system generates an error message according to the operating mode and the detected fault The AC grid voltage is too low The AC grid voltage is too high Fault Code No Ug Ug L Ug H g H IgRMS H llost H Fre H Fre L Pw H No balan Helay1 un Helay2 un VdcL Wait VdcL Run Idc H Tmpr H The output power is too high Output power input power gt 700W The dc current of the grid is too high The temperature is too high Communication err 0 Comm un Communication err Installation Guide RN5000US 55 9 Technical Specifications 9 1 Digiwatts Wiring Diagrams UTILITY EARTH GROUND AC DISTRIBUTION PANEL AC DISCONNECT SWITCH DISCONNECT SWITCH Installation Guide RN5000US 56 9 2 Specifications Item Description Specification B jRangeofinputoperatingvoltage 200 450V
10. than 20 cm to the inverter for an extended of time CAUTION Risk of Electric Shock Do not remove cover No user serviceable parts inside Refer servicing to qualified service personnel CAUTION Risk of Electric Shock e Both AC and DC voltage sources are terminated inside this equipment Each circuit must be individually disconnected before servicing e When the photovoltaic array is exposed to light it supplies a DC voltage to this equipment WARNING For continued protection against fire replace fuses only with units of same type and ratings CAUTION Hisk of electric shock form energy stored in capacitor Do not remove cover until 15 minutes after disconnecting all sources of supply CAUTION The Digiwatts system shall not be connected to a battery due to lack of over current protection provided in the unit Installation Guide RN5000US 17 1 5 3 Symbols on the Type Label Table1 3 Symbols on the Type Label Intertek 4000325 Installation Guide The product works with high voltages All work on the product may only be done as described in the documentation The product can generate heat during operation Avoid coming into contact with the product during operation Read the product s documentation before working on it Follow all safety precautions and instructions as described in the documentation The inverter can be installed outdoors Direct Current DC Alternating Current AC Certified safety
11. that everything is in the right place and that all connections and knockout fittings are secure and properly torqued Check all of the knockout fittings on the bottom of the Digiwatts unit to ensure that they provide a weather tight seal AN AN WARNING Never install the Digiwatts unit during rain or very damp conditions Because the Digiwatts unit is completely sealed you must be sure no moisture is trapped inside the enclosure when securing the lid CAUTION Be careful not to misplace the machine screws or the enclosure seal that attach the cover to the case as all four screws and enclosure seal are required to ensure that the cover is grounded properly and is fully sealed to the case Handle the cover carefully as even seemingly minor damage to the cover could result in an inadequate seal between the cover and the case thus allowing moisture to enter the case and damage the sensitive electronic components Use the following procedure to replace the cover on the Digiwatts unit 1 2 Secure the three connections with the appropriate mating connectors on the LCD board Check wire routing to ensure that no wires can interfere with proper sealing of the cover and that no pressure will be exerted on the connections when the cover is replaced Locate the four machine screws and enclosure gasket you removed to take the cover off the Digiwatts unit Make sure you have all four screws and enclosure Installation Guide RN50
12. the wall you choose to mount the Digiwatts unit on is sturdy enough to support its weight 27 kg over a long period of time and that the wall is plumb The screws may also be mounted on masonry brick or solid walls Be sure to use the appropriate type of mounting hardware for the wall material Figure 4 4 Fasten the Bracket against Masonry Wall with Expansion Screws Installation Guide RN5000US 30 Table 5 1 Mounting Items Item ription 6 jHexagoalnut O Mounting the expansion screws Three fasteners are required to secure the wall mounting bracket to a wall Two fasteners along the top of bracket using the center holes on each side centerline spacing of 252mm and a third fastener at the centerline of the bottom of the bracket Expansion screws are provided however it is installers responsibility fasteners are appropriate for wall material Ensure that all fasteners are well secured 4 3 2 Mounting the Digiwatts Unit to the Wall Bracket Use the following procedure to mount the Digiwatts unit once wall bracket is secured to the wall 1 Carefully hook the slots on the rear of the Digiwatts case onto corresponding vertical tabs of the wall bracket Figure 4 5 Attach the Inverter to Bracket Installation Guide RN5000US 31 WARNING The Digiwatts unit weighs up to 27 kg To avoid injury be sure to use proper lifting techniques and secure the help of someone to assist in the unpa
13. 00US 45 seal as all of this hardware is necessary to ensure proper grounding and a weather tight seal Check the enclosure seal on the inside of the cover to ensure it is undamaged and in the correct position Carefully position the cover on the front of the Digiwatts unit so that the four holes in the cover are aligned correctly with the four threaded holes in the case While holding the cover in place carefully insert the four machine screws with lock washer through the holes in the cover into threaded holes in the case and turn them until they are finger tight Be careful not to cross thread any of the screws Do not use power tools to start the screws Verify that the cover is in the correct position and that the seal is in place between the case and the cover Tighten the cover screws Figure 5 8 Closing the Digiwatts unit Installation Guide RN5000US 46 6 Commissioning WARNING N Follow the steps in the commissioning procedure in the order they are presented Deviating from these procedures could expose you to lethal voltages that can cause serious injury and or death CAUTION N Follow the steps in the commissioning procedure in the order they are presented Deviating from these procedures could cause irreversible damage to the Digiwatts unit and void the warranty an Observe the operating instructions To commission the Digiwatts unit follow these instructions 1 Make sure any covering placed over the PV
14. B 0A D Maximum array short circuit current dc 2 12 5A 1 0 Outp ut oower factor rating ac RR IG Operating voltage range ac 215 265V__ O Maximum output overcurrent protection 50A Cd P Peak Power Tracking Voltage 1 250 440V Q X Number of Inputs o R PV Start Voltage 1 250V LxWxH in 8 6 x 20 9 x 18 Ambient Temperature Range E ps F 0 W nighttime W Power consumption SN ceram Installation Guide RN5000US 57 9 3 Trip Limits Trip Times w es 60 45 60 55 max 0 1602 59 25 59 35 max 0 1602 210 212 max 2 002 110 261 263 max 1 001 120 287 289 max 0 1602 NOTE This unit or system is provided with fixed trip limits and shall not be aggregated above 30 kW on a single Point of Common Connection 119 121 max 0 1602 240 9 4 Torque Values and Wire Sizes Green AC amp DC Terminal Blocks Phoenix 2 5 1 8 10 AWG Cover Machine Screws 6 44 D Installation Guide RN5000US 58
15. C Installation Guide RN5000US 43 Inverter 1 Inverter 2 Inverter n n 15 RS485 232 Converter Pr a A 7 m jr RENS a p i P R BROOK HOG ote WE Flo i o sseee AA TX doj e eee PLR G TX F 5485 Bus nimaa A p eee Figure 5 6 Communication Wiring Wiring procedure 1 A resistance with 1200 is connected at the initiating terminal of RS485 bus 2 Plug the connector of the RS485 cable into corresponding RS485 terminal of Inverter 1 3 The two lines of the other end of RS485 cable labeled A and B are connected to corresponding lines of RS485 bus as the above diagram 4 Connect other inverters to RS485 bus in the same way 5 Atthe end of RS485 bus connect RS485 A cable to RX port of HS232 RS485 converter and connect RS485 B cable to TX port of RS232 RS485 converter 6 Connect RS232 port of RS485 232 converter to RS232 port of PC Information i All Digiwatts inverters are capable of R8485 communication You can mix different Digiwatts models on a single R8485 communication bus IS NOTICE RS485 bus requirements to ensure quality of communication gt Shielding twist pair type gt ehielding layer of RS485 bus should be single point grounding to avoid ground loops Installation Guide RN5000US 44 5 6 Closing the Digiwatts unit When you have finished connecting the AC output wires the DC input wires re check all your connections to ensure
16. N5000US 3 In addition to the safety and hazard symbols described on the previous pages the following symbols are also used in this Installation Guide Make sure to read the labels and fully understand them before installing the equipment i INFORMATION This symbol calls attention to supplementary information that you should know and to ensure optimal operation of the unit Markings on this product The following symbols are used as markings on this product with the following meanings Warning regarding dangerous voltage The product works with high voltages All work on the product may only be done as described in the documentation Beware of hot surface The product can generate heat during operation Avoid coming into contact with the product during operation Observe the operating instructions Read the product s documentation before working on it Follow all safety precautions and instructions as described in the documentation Safety criterion e l us ETL is the standard applied by Electrical Testing Laboratories to the Temm Digiwatts system to certify that it meets the requirements of the highest 7 Safety criterion of the USA and Canada Installation Guide RN5000US 4 General Warnings All electrical installations must be done in accordance with the local and National Electrical Code ANSI NFPA70 For installation in Canada the installations must be done in accordance with applicable Canadian standards T
17. Ns Tep N L WE N i Figure 5 5 DC Connection Terminals i Information The Digiwatts system has provisions for up to four PV strings CAUTION Avoid using wire nuts to for any connections in the PV system Wire nuts are a frequent cause of unreliable resistive connections and ground faults Installation Guide RN5000US 5 4 2 Connecting the DC Wires Verify that the AC breaker s are OFF Verify that the DC disconnect is open in the external DC disconnect enclosure Pull the DC wires from the DC disconnect through the conduit into the interior of the Digiwatts unit Connect the positive and negative DC wire to the terminal labeled DC and DC in the Digiwatts unit Connect the PV array ground wire to the PE terminal labeled D in the Digiwatts unit Verify that all connections are correctly wired and properly torqued 2 5Nm Pull on the cables in order to make sure that they are sufficiently secured within the terminals 5 5 Communication Wiring The inverter provides RS485 interface to communicate with remote PC or logger User can monitor the state of the inverter and observe real time and historical functional information via this interface WARNING The cable should be no longer than 1200 meters with a common shield and a wire size no smaller than 24 AWG 5 5 1 RS485 Communication RS485 is a communication standard for bidirectional transmission of data between one or more Digiwatts units and a P
18. TS RNSOOOUS Grid 243V 00 0A Hour 0000 0h Ttl 00000kWh Power 0000W PV1 096V 00 0A PV2 002V 00 0A Renovo Power Systems 7 4 Operating Modes e Offset Offset calibration of the electronics at start up e Wait PV voltage is not high enough to start e Run Normal operation e Derating Reduction of the grid fed power due to abnormal temperatures e Stop Inverter fault user interaction required Installation Guide RN5000US 52 8 Troubleshooting 8 1 General Our quality control program assures that each inverter is manufactured to exact specifications and is thoroughly verified prior to leaving the factory In the unlikely event difficulty is encountered with the operation of the inverter follow the steps below to correct the problem 1 Check amp record the exact Mode and or Fault messages on the LCD display 2 Check the DC and AC voltages at terminals inside the inverter Be sure to observe all of the safety precautions listed throughout this manual when doing so or hire a qualified professional 3 If the system problem persists contact RENOVO POWER technical support at 810 923 2643 In order to better assist you when contacting RENOVO POWER please provide the following information Required Information for Digiwatts unit Service Serial number Model Number Short description of the problem Display message What error code is indicated AC line voltage DC line voltage Can you
19. ach Digiwatts inverter comes equipped with three LED status indicators This shows users the main status when the inverter is working The basic definitions of the indicator lights are as follows Figure 7 1 Front Cover LED Status Indicators e he upper green LED indicates the Digiwatts unit is waiting and the middle green LED indicates the Digiwatts unit is running e he red LED indicates the status of stop It means that there is some fault either inside the inverter or somewhere in the PV system The inverter will not operate until the fault has been corrected 7 1 LED Operation Indicators Night All LEDs are off The inverter is in standby mode because the input voltage is too low for operation Initialization All LEDs are on The inverter is initializing The power from the array is sufficient to initialize control Installation Guide RN5000US 49 power but not yet powerful enough to begin normal operation Data transmission is not possible during initialization Occasionally during inclement weather or low irradiation the LEDs may all turn on at once and then go off again This indicates that the inverter Is trying to initialize but the power available from the array is not sufficient for normal operation This is not a malfunction Waiting The wait LED is blinking the other two are off The PV energy is sufficient to enable self checking but is insufficient for feeding power to the utility grid Normal Operation The run
20. al component temperature e If the inverter is installed outside it should be mounted vertically see Figure 4 1 Figure 4 1 Digiwatts unit mounting positions Installation Guide RN5000US 27 4 2 Dimensions and Required Clearances N CAUTION If you are installing the Digiwatts unit in a cabinet closet or other relative enclosed area sufficient air circulation must be provided to dissipate the heat generated by the inverter Figure 4 2 shows the outer dimensions of the Digiwatts unit The unit must be mounted so that there are at least 50cm of clearance at all points Sc UI Tm p e am am Figure 4 2 The Outer Dimensions of the Digiwatts unit Installation Guide RN5000US 28 b 53 SHA Tu E e j i 1 E401 p n H X2X2 Ei ooa TE ea gt E3 2 2 J g ry 5 p m u ay oo e izy gt M o2 c 2o F H 240 os ru J T 45040 Figure 4 3 Dimensions of the Wall Mounting Bracket d Information You must ensure that there is sufficient clearance for the flow of the air around the Digiwatts unit In a normal operating environment with good ventilation 50 cm of clearance is sufficient The National Electrical Code may require increased working clearances Installation Guide RN5000US 29 4 3 Mounting Procedure 4 3 1 Mounting the Wall Mounting Screw The Digiwatts unit is shipped with expansion screws suitable for use with most walls Make sure that
21. array is removed 2 Connect the grid voltage to Digiwatts unit by switching on main AC circuit breaker 3 Connect the external DC If there is sufficient sunlight available the Digiwatts unit will enter the Wait mode at this time and the green LED will begin to blink 4 Ifno AC faults are detected the Wait mode will end after 60 seconds and the green LED will stop blinking the Digiwatts unit will begin to operate normally If an AC fault was registered the Digiwatts unit will wait 90 seconds prior to starting Information If the Digiwatts unit is not operating as expected after the commissioning procedure has been completed refer to section 7 and 8 Information d If there is adequate solar irradiation and the resulting PV input voltage is Installation Guide RN5000US 47 greater than 250V DC the Digiwatts unit will automatically begin feeding power to the utility grid Information The Digiwatts unit operates from the power produced by the PV array and is designed for minimal internal DC power consumption The maximum power that the Digiwatts unit will consume in normal operation is 8W Information Anytime the AC power is disconnected from the inverter either manually or as a result of an AC disturbance the inverter will wait 5 minutes after the AC power has been restored to reconnect When servicing the inverter always disconnect the AC first then the DC Installation Guide RN5000US 48 7 Displays and Messages E
22. ces are not suitable for use in DC circuits as once conducting they continue conducting until the voltage across their terminals is typically less than 30 volts Safety criterion K V is ETL is the standard applied by Electrical Testing Laboratories to the Digiwatts system to certify that it meets the requirements of the highest 4000325 safety criterion of the USA and Canada The Digiwatts system has been tested and listed by ETL to meet the requirements of UL1741 Static Inverters and IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems The Digiwatts system is also listed under CSA Std C22 2 No 107 1 01 1 5 2 Safety instructions DANGER N Danger to life due to high voltages in the inverter e All work on the inverter may only be carried out by qualified personnel e The appliance is not to be used by children or persons with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction e Children should be supervised to ensure that they do not play with the appliance CAUTION Risk of Burn Injuries Parts of the enclosure can become hot The product can generate heat during operation Avoid coming into contact with the product during operation Installation Guide RN5000US 16 AN gt gt D CAUTION Possible damage to health as a result of the effects of electro magnetic radiation Do not stay closer
23. cking and installation of the inverter 2 Secure the bottom tabs protruding from the bottom of the Digiwatts units to the bracket using two M6 machine screws M6 Screw Figure 4 6 Affix Bottom Tabs of Digiwatts unit to Mounting Bracket 3 Inspect the Digiwatts unit from both sides to ensure that it sits centered on the wall screws 4 Carefully verify that the Digiwatts unit is mounted firmly in place 5 Wiring the Digiwatts unit This section provides step by step procedures and other information required for wiring the Digiwatts unit to the PV array and the utility grid To complete the installation in a safe and efficient manner complete the steps in the order that they appear Installation Guide RN5000US 32 gt p AN AN WARNING Before connecting or operating the Digiwatts unit read all of the instructions cautions and warnings on the Digiwatts unit the PV array and in this Installation Guide WARNING You must connect the wires that carry the AC voltage from the Digiwatts unit to the utility grid and the wires that carry the DC voltage from the PV array to the Digiwatts unit in the order described in the procedures in this section Deviating from these procedures could expose you to lethal voltage WARNING The inverter does not have integrated AC or DC disconnects However as a complete assembly or system the unit requires that the customer shall supply external fuses and an isolation device This is
24. e PV System Information i Policies vary from one utility company to another Consult with a representative of the local utility company before designing and installing a PV system NOTICE N Any other or additional use is not permitted except the intended use The inverter must only be connected to public utility grid If output of inverter is connected to local loads household appliance lights motor loads etc the inverter will not start Installation Guide RN5000US 9 Electrical block diagram Figure 1 2 shows the main circuit of Digiwatts transformerless grid connected inverter system A boost circuit raises input DC voltage within the inverter Then a Maximum Power Point Tracker MPPT ensures that maximum power is extracted from the PV arrays Afterwards a full bridge inverter circuit converts DC power to AC power which is then output from the unit DC Figure 1 2 Electrical Block Diagram Installation Guide RN5000US 10 Terminals of the Digiwatts system Figure 1 3 Product Description Table 1 1 Terminals Description MU M a ll Ton ml naan ltem Name Descrip 1 jDCinpus Two pairs of DC strain reliefs are the input ports 2 LCD display Running data is displayed on the LCD screen 3 JAC outputs Output port strain relief of the
25. e particular components Figure 3 2 Locations of the Major Internal Components Installation Guide RN5000US 24 Table 3 1 Internal Components PV enclosure inputs Power Supply Board DSP Board ltem B D JRS485 3 3 Configuring the AC Voltage The Digiwatts system is compatible with 240V AC output The Digiwatts unit comes from the factory pre configured for utility interconnection at 240V AC 240 Delita 240 120 Soft Phase Corner grounded x ps ggg a a ag 240 Deba 120 Stinger 240 Delta Figure 3 3 Common Utility Voltage Configurations i Information When using 240 V Delta Corner grounded grids connect the N terminal to the grounded corner Installation Guide RN5000US 25 4 Mounting This section provides guidelines to help you select the best mounting location suggestions to insure best performance cautions and warnings that you should follow to avoid injury and or equipment damage and step by step instructions for mounting a Digiwatts inverter WARNING N The Digiwatts unit weighs up to 27 kg To avoid injury be sure to use proper lifting techniques and secure the help of someone to assist in the unpacking and installation of the inverter Information It is required that the inverter be mounted so that the rating label on the side of the inverter is visible 4 1 Choosing a Mounting Location Consider the following guidelines cautions and warnings whe
26. eeceeeseeeeeceeeeeeeeaaeeeeesaseeesseeeeeseeeeessaaes 20 2A S900p6 0f DEIVI TC EE 22 SAG VOJE GoHligulatlOD sedie seit arie dedv md tuve epi Se eiie epi ddr bride unida 23 9 1 Opehing the Digiwatts DOE op 0 Sade xx EE VNMAEUM ED UNE dE 23 3 2 Locating Internal Components eeeeeeeesseseeeeeeerrneeeeennnnn 24 3 3 Configuring the AC Voltage cccccccssssssseccceeeeeeeeeseeeeeeeessseeeeeeeeeeeeeeeaaas 25 A MISMAS aE EAEE EEEIEE EESE 26 4 1 Choosing a Mounting Location ccccccsseeeeeeeecaeeseeeeeeeaeeeeeesseaaeeeeeeaas 26 4 2 Dimensions and Required Clearance ccccccssseeeeeeeeeeeeeeeeeseeeeeeeeeseaaes 28 4 3 MOUNTING Procedure e EHE etui etes I Ride 30 4 3 1 Mounting the Wall Mounting Screw eeessssssss 30 4 3 2 Mounting the Digiwatts Unit to the Wall Bracket 31 5 Wiring the Digiwatts Unit cccccsssccccessseeccsesseecceseeecsesseeessaseeecseeseessseaes 32 5 1 Sequence of Connecting ccccccecsseeeeeeeceeeeeceeeeseeeeeeeesseaaeaeeeeeeeeeseaaas 35 5 2 Opening Me DIOS eet autoritate eet eee eee ee ee ont 36 B35 WINING thie AC QUID UT m M 37 5 3 1 AC Connection Requirement esses 37 5 3 2 Connecting the AC Wires sseeeeeeeeeeseeeeeennnnn 38 5 4 Wirlnig tre DG Inpede shat sine lakhs he e dede ero ie E UFU Ev rU UU X UE e aux ott 39
27. electricity supplies are usually by long overhead lines Surges may be induced on both the PV array conductors and the AC cables leading to the building The risk of a direct lightning strike into a building can be mitigated by using appropriate external lightning protection configured to discharge lightning current to ground Specialists in lightning protection should be consulted regarding the Installation Guide RN5000US 14 application To protect the DC system surge suppression devices SPD Type 2 should be fitted at both the inverter end and array end of the DC cabling If the voltage protection level VP of the surge arresters is greater than 1100 V an additional SPD Type 3 is required for surge protection for electrical devices Junction Minimize loop areas Figure 1 5 SPD Layout To protect the AC system surge suppression devices SPD type 2 should be fitted at the main AC input point at the consumer s cutout located between the inverter and Installation Guide RN5000US 15 the meter distribution system SPD test impulse D1 for signal line according to EN 6164321 All DC cables should be installed to provide runs as short as possible and positive and negative cables of the same string or main DC supply should be bundled together avoiding the creation of loops in the system This requirement for short runs and bundling includes any associated earth bonding conductors Spark gap devi
28. etermine if the equipment should be returned for repair and provide instructions to process if required e ltisthe customers responsibility to file a claim with the carrier Failure to file a claim with the carrier may void all warranty service rights for any damage e If it becomes necessary to return the Digiwatts unit use the original packaging in which it was delivered Installation Guide RN5000US 20 WARNING N The Digiwatts unit weighs up to 27kg To avoid injury be sure to use proper lifting techniques and secure the help of someone to assist in the unpacking and installation of the inverter If you need assistance with a damaged Digiwatts unit contact Renovo Power Contact information for Renovo Power is provided below North America Renovo Power Systems LLC 2723 South State Street Suite 100 Ann Arbor MI 48105 Tel 855 RENOVO1 736 6861 Fax 888 810 6454 http www renovo usa com Asia Renovo Power Systems Wuxi Lianyuan Co Ltd 1608 Huishan Da Dao Wuxi Jiangsu China Tel 86 510 83593809 Fax 86 510 83595210 http www renovo power com Installation Guide RN5000US 21 2 1 Scope of Delivery Table 2 1 Delivery Contents ltem Description Note B Bracket Usedformounting inverter onto the wall D M6 machine screws X Fastening Digiwatts system onto the bracket E User manual Installation and operation instructions F WamantySericestatement
29. grid in the order described in this procedure Deviating from this procedure could expose you to lethal voltages that can cause serious injury and or death 5 3 2 Connecting the AC Wires Turn OFF the main breaker in the main utility breaker box Remove the cover and disconnect LCD board connections on Digiwatts unit If you are replacing an existing inverter disconnect the wires for the AC line you are working within the breaker box Pull the AC wires through the conduit from the interior AC terminal of the Digiwatts unit Connect the AC equipment ground wire to the PE terminal labeled e within the Digiwatts unit Connect the L and N wires to the terminals labeled L and N Connect the wires to the terminal blocks in the Digiwatts unit and tighten them Verify that all connections are correctly wired and properly torqued 2 5Nm Pull on the individual cables in order to make sure that they are sufficiently secured within the terminals Installation Guide RN5000US 38 Figure 5 3 AC Connection Terminals 5 4 Wiring the DC input This subsection provides procedures for wiring the DC input from the PV array to the Digiwatts unit The figure 5 4 below shows a simplified wiring diagram of a PV System 5 4 1 DC Connection Requirements WARNING N All electrical installations must be done in accordance with all local electrical codes and with the National Electrical Code NEC ANSI NFPA 70 For installation in Canada the installat
30. he Digiwatts unit contains no user serviceable parts For all repair and maintenance always return the unit to an authorized Renovo Power Service Center Before installing or using the Digiwatts unit read all of the instructions cautions and warnings on the Digiwatts unit the PV array and in this Installation Guide PV arrays produce electrical energy when exposed to light and thus can create an electrical shock hazard Wiring of the PV arrays should only be performed by qualified personnel According to these basic safety rules qualified and trained people have skills for the assembling start up and operation of the product as well as the necessary requirements and qualifications to perform such operations Installation Guide RN5000US 5 Table of Contents Minores ER 8 tel VAN eee 8 LEA Ez e 210110 o EEEE EEE EEE E 8 1 3 Product overview cccccscccccceseeecceseeeceeuseeecseuseeecsaeeeessaseeecsenseeessageeeeses 9 Id abe QV CIVICW ae syst asteaedeardvusigavevacscavsvevanepevacavevanavepepaudgaveranls 13 EEST i a eSEE EER EREE OANE EENEN EENEN EENEN NENERENES T 13 1 5 1 Protection and criterion ccccccsssseeecccceesseeeeccaeeseceesseeaeeeeesseaeess 13 1 5 2 Safety instructions cccccecccsseeeeeeeeeeeeeeeaeeeeeeeeeeeeeeaaeaeeeeeeeeeeeaaas 16 1 5 3 Symbolson ihe Type Lapel iactat ctae 18 1 6 instalator OVENVIEW sive ccc coc nS Ru a aea txt d eate ed toc 19 2 Unpacking and Inspection cccccs
31. ions must be done in accordance with applicable Canadian standards Installation Guide RN5000US 39 gt D gt gt WARNING Use 10 AWG 105 copper wire for all DC wiring connections to the Digiwatts Voltage drop and other considerations may dictate that larger size wires be used Use only solid or stranded wire but not fine stranded wire WARNING The DC disconnect for the inverter must have a minimum rating of 600VDC and 36A continuous Information Series fusing may be required depending on the type of PV module used in the system See NEC 690 9 WARNING You must connect the wires that carry the DC voltage from the PV array to the Digiwatts unit in the order described in the following procedure Deviating from this procedure could expose you to lethal voltages that can cause serious injury and or death WARNING PV arrays are energized when exposed to light Use safe working practices when working on PV arrays WARNING Always turn OFF all AC and DC breakers and switches in the PV system and wait a minimum of 15 minutes for the Digiwatts unit to completely discharge before connecting any wires to the Digiwatts unit or disconnecting any wires from the Digiwatts unit Failure to do so could expose you to lethal voltages that can cause serious injury and or death Installation Guide RN5000US 40 CAUTION N Verify the polarity and the open circuit voltage from the PV strings before you connect the DC wires to
32. n choosing a mounting location for the Digiwatts unit WARNING Danger to life due to fire or explosion Do not install the inverter on flammable construction materials in areas where highly flammable materials are stored or in potentially explosive areas CAUTION The Digiwatts unit weighs up to 27kg Ensure that the mounting surface sufficiently sturdy to hold the weight of the Digiwatts Do not mount the Digiwatts on plasterboard sheet rock or thin wood paneling Installation Guide RN5000US 26 N NOTICE This unit is designed for indoor or outdoor usage But it is suggested that the unit not be exposed to rain or water directly and use of a shelter to protect the unit would be preferred Do not expose this unit to the sun directly This may reduce the output power due to high temperature e Height from ground level should be such to ensure that display and status LEDs are easy to read e The inverter should be installed in a location that is inaccessible to children e he Digiwatts unit emits a slight vibrating noise when operating This vibration is normal and has no effect on performance but it can be objectionable if the inverter is mounted on a wall in a living area on the outside of a wall that is near a living area or on certain types of materials such as thin wood paneling or sheet metal e Install the Digiwatts unit in a location that maintains an ambient air temperature less than 45 C to maintain a safe intern
33. nected to the PV Grounding and DC Grounding Electrode Conductor Use 10 AWG 105 C copper wire for PV grounding Installation Guide RN5000US 34 5 1 Sequence of Connecting Figure 5 1 Electrical Connection Diagram 1 De energize all energy sources by opening all AC and DC disconnects and or breakers 2 Wire from AC breaker to the AC disconnect switch 3 Wire from the AC disconnect switch to the Digiwatts unit 4 Wire from the PV wires to the DC disconnect 5 Wire from the DC disconnect to the Digiwatts unit 6 Turn the DC switches and or breakers ON 7 Turn the AC switch and or breakers ON 8 To disconnect the Digiwatts unit first turn OFF all AC disconnects and then all DC disconnects The AC system should always be disconnected before the DC system WARNING N Always wait a minimum of 15 minutes for stored potentials in the Digiwatts unit to discharge completely before opening the enclosure Installation Guide RN5000US 35 5 2 Opening the Digiwatts 1 Remove the four machine screws from the housing cover and pull the cover forward smoothly 2 Disconnect the three connections on the front cover LCD display board Note that each connector is unique and only able to reconnect to a single position 3 Putthe cover the machine screws and washers to one side so that they do not get lost All four fasteners are required to provide sufficient enclosure sealing Figure 5 2 a Opening the Digi
34. not only a good safety practice but a mandatory requirement as a license condition of agency certified equipment A manual AC switch disconnect and DC switch disconnect must be provided and located in an accessible position Please check the unit nameplate and run ample capacity A suitably rated Isolating switch should be fitted immediately adjacent to each unit and installed both for AC output and DC input WARNING POWER FED FROM MORE THAN ONE SOURCE WARNING Always turn OFF all switches in the PV system before connecting any wires to or disconnecting any wires from the Digiwatts unit Installation Guide RN5000US 33 i Information The DC input and AC output circuits are isolated from the enclosure and system grounding as required by section 250 of the National Electric Code ANSI NFPA 70 Similarly such isolation of DC input and AC output circuits from enclosure and system grounding is also required by the CANADIAN ELECTRICAL CODE PART 1 Itis the responsibility of the installer to maintain this isolation The Photovoltaic System Grounding shall be installed per the requirements of sections 690 41 through 690 47 of the National Electric Code ANSI NFPA 70 It is the responsibility of the installer to meet these requirements AC Grounding The Digiwatts unit must be connected to the AC ground from the utility via the Ground Terminal Use 10 AWG 105 C copper wire for AC grounding PV Grounding The PV array ground should be con
35. reen display information meanings and how to determine faults Section 7 Troubleshooting Provides troubleshooting tips and procedures for resolving problems that may occur during installation and operation Installation Guide RN5000US 19 Section 8 Technical Specifications Provides functional technical data plus connection diagrams and torque specifications for the connection of cables and fasteners of the Digiwatts unit 2 Unpacking and Inspection T NOTICE The distributor delivered your Digiwatts unit to the carrier fully functional and securely packaged Upon acceptance of the package the carrier assumes responsibility for its safe delivery In spite of careful handling transport damage to package or its contents is always a possibility Inspect the shipping box for apparent damage such as holes tears or any other sign of possible damage to its contents Describe any damage or shortage on the receiving documents making sure to obtain the carrier acknowledgment with his her full signature Open the shipping box and inspect the contents for internal damage While unpacking be careful not to discard any equipment parts or manuals If any damage is detected call the delivering carrier to determine the appropriate action Save all shipping material in the event the carrier sends an inspector to verify damage e If the inspection reveals damage to the inverter call your supplier or authorized distributor They will d
36. s the assembly installation commissioning and troubleshooting of the following Renovo inverter Digiwatts RN5000US Information d To help avoid problems during the installation familiarize yourself with the installation process by reading the entire Installation Guide before starting the installation WARNING Lethal voltages are present at various points in a PV system For safety reasons it is recommended that only qualified personnel can install and operate this equipment Read and understand all the instructions contained in this manual and become familiar with the safety symbols in the relevant paragraphs before you install and commission the equipment 1 2 Target group This manual is for qualified electricians The tasks described in this manual may be performed by electrically qualified persons only Installation Guide RN5000US 8 1 3 Product overview e Basic information The Digiwatts inverter is used to convert DC power generated by the PV arrays into stable AC power for output to the utility grid The Digiwatts system is a transformerless inverter and performs this conversion in a very efficient way without moving components using only solid state power electronic devices It is a crucial unit in the small scale PV power system An example of basic PV power system components is shown in the Figure 1 1 PV Array gs Utility Gid Met er B Figure 1 1 Digiwatts system is installed in a Utility Interactiv
37. the Digiwatts unit Applying an open circuit DC input voltage that exceeds the maximum DC input voltage range will cause irreversible damage to the Digiwatts unit and void the warranty Always configure the DC input voltage range correctly before connecting the DC input wires from the PV array to the Digiwatts unit d mr iH MM T Figure 5 4 PV Modules Connection to Digiwatts unit The PV modules connected to either the left or right two DC connectors should be Same type Same number dentical alignment dentical tilt The maximum length of DC connecting cables should not exceed 30mas required by the EMC Directive When connecting just two identical strings it is more efficient to connect these to the left or right two DC connectors Exception shaded strings or if the total input current is more than 13A The connecting cables of the PV modules must be fitted with plug connectors Installation Guide RN5000US 41 You will find the necessary DC strain relief connectors for DC connection in the delivery package e The following limit values at the DC input of the inverter must not be exceeded Maximum input voltage Left 2 inputs Right 2 inputs 500V 13A N WARNING Verify that the DC current of your installation does not exceed the maximum values specified in the rating label Check both the polarity and the open circuit voltage from the PV strings p m
38. watts unit Installation Guide RN5000US 36 Figure 5 2 b Front Cover Electrical Connections 5 3 Wiring the AC Output This subsection provides complete step by step procedures for wiring the AC output from the Digiwatts unit to the utility grid 5 3 1 AC Connection Requirement AN AN WARNING All electrical installations must be done in accordance with all local electrical codes and with the National Electrical Code NEC ANSI NFPA 70 Use 10 AWG 105 C copper wire for all AC wiring connections to the Digiwatts Voltage drop and other considerations may dictate that larger size wires be used Use only solid or stranded wire but not fine stranded wire WARNING The National Electrical Code NEC states that the inverter must be connected to a dedicated circuit and that no other outlets or devices can be connected to the same circuit See NEC Section 690 64 b 1 The NEC also imposes limitations on the size of the inverter and the manner in which it is connected to the utility grid See NEC Section 690 64 b 2 Installation Guide RN5000US 37 AN AN WARNING To reduce the risk of fire connect only to a circuit provided with the required branch circuit over current device sized in accordance with the National Electric Code ANSI NFPA 70 The maximum size over current device shall not be more than 50 amperes WARNING You must connect the wires that carry the AC voltage from the Digiwatts unit to the utility
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