Renovo Digiwatts RN5000US Installation Manual
  1. Manuals
  2. Brands
  3. Renovo Manuals
  4. Inverter
  5. Digiwatts RN5000US
  6. Installation manual

Renovo Digiwatts RN5000US Installation Manual

Pv grid-connected inverter
Hide thumbs Also See for Digiwatts RN5000US:
Table of Contents

Advertisement

Quick Links

PV Grid-Connected Inverter
Digiwatts RN5000US
Installation Guide

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Digiwatts RN5000US and is the answer not in the manual?

Questions and answers

Related Manuals for Renovo Digiwatts RN5000US

Summary of Contents for Renovo Digiwatts RN5000US

  • Page 1 PV Grid-Connected Inverter Digiwatts RN5000US Installation Guide...
  • Page 2 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.)

  • Page 3: Save These Instructions

    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.
  • Page 4 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. INFORMATION This symbol calls attention to supplementary information that you should know and to ensure optimal operation of the unit.
  • Page 5 Canadian standards. The 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.

  • Page 6: Table Of Contents

    Table of Contents Introduction ..................... 8     Validity ..................8     Target Group ................8     Product Overview............... 9     Feature Overview..............13     Safety..................13     1.5.1 Protection and Criterion..........13     1.5.2 Safety Instructions............
  • Page 7 5.4.1 DC Connection Requirements........42     5.4.2 Connecting the DC Wires..........45     Communication Wiring............. 46     5.5.1 RS485 Communication ..........47     Closing the Digiwatts unit............48     Commissioning ..................51     Displays and Messages ............... 53  ...

  • Page 8: Introduction

    Introduction 1.1 Validity This manual describes the assembly, installation, commissioning and troubleshooting of the following Renovo inverter: Digiwatts RN5000US. Information To help avoid problems during the installation, familiarize yourself with the installation process by reading the entire Installation Guide before starting the installation.

  • Page 9: Product Overview

    1.3 Product Overview 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.
  • Page 10 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 (MPP) tracker 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.
  • Page 11 Terminals of the Digiwatts system Figure 1-3 Product Description Table 1-1 Terminals Description Item Name Description DC inputs Two pairs of DC strain reliefs are the input ports LCD display Running data is displayed on the LCD screen AC outputs Output port strain relief of the Digiwatts unit RS485 terminal Standard communication interface...
  • Page 12 Dimensions and weight Figure 1-4 Dimensions of the Digiwatts unit Table 1-2 Dimensions Value Depth Width Height Weight Type (mm/Inch) (mm/Inch) (mm/Inch) (kg/lb.) RN5000US 218 / 8.6 532 / 20.9 458 / 18 27 / 59 Installation Guide RN5000US Apr 13...

  • Page 13: Feature Overview

    1.4 Feature Overview The Digiwatts system represents state-of-the-art technology. Several key features:  High reliability and safety  High efficiency  Simple installation  Quiet operation  LCD Display  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.
  • Page 14 that the system will not export power into a 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.
  • Page 15 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 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.

  • Page 16: Safety Instructions

    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 devices 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.
  • Page 17 during operation. CAUTION Possible damage to health as a result of the effects of electro-magnetic radiation! Do not stay closer 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.

  • Page 18: Symbols On The Type Label

    1.5.3 Symbols on the Type Label Table1-3 Symbols on the Type Label Icon Explanation 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.

  • Page 19: Installation Overview

    1.6 Installation Overview This section provides an overview of the installation process. Section 2: Unpacking and Inspection Provides instructions for unpacking and inspecting the Digiwatts system for shipping damage. Section 3: General Use Read 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.

  • Page 20: Unpacking And Inspection

    Unpacking and Inspection 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. ...
  • Page 21 If you need assistance with a damaged Digiwatts unit, contact Renovo Power. Contact information for Renovo Power Systems is provided below.

  • Page 22: Scope Of Delivery

    2.1 Scope of Delivery Table 2-1 Delivery Contents Item Description Note RN5000US Digiwatts Inverter unit Bracket Used for mounting inverter onto the wall Expansion screws Fastening bracket onto the masonry wall M6 machine screws Fastening Digiwatts system onto the bracket User manual Installation and operation instructions Product test report...

  • Page 23: Ac Voltage Configuration

    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 smoothly pull the cover forward 4 to 6 inches to access cables connected to front cover. 2) Remove any communication or power cables possibly connecting the front cover LCD board.

  • Page 24: Locating Internal Components

    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.

  • Page 25: Configuring The Ac Voltage

    Table 3-1 Internal Components Item Description PV enclosure inputs Power supply board Main board DSP board AC output RS485 Communication Port Heat sink 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 Figure 3-3: Common Utility Voltage Configurations Installation Guide RN5000US Apr 13...

  • Page 26: Mounting

    Information When using 240 V Delta Corner grounded grids, connect the L1 terminal to the grounded corner. 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.
  • Page 27 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. 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.

  • Page 28: Dimensions And Required Clearances

    Figure 4-1 Digiwatts unit mounting positions 4.2 Dimensions and Required Clearances 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.
  • Page 29 Figure 4-3 Dimensions of the Wall Mounting Bracket 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.

  • Page 30: Mounting Procedure

    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 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.

  • Page 31: Mounting The Digiwatts Unit To The Wall Bracket

    Table 5-1 Mounting Items Item Description Concrete / block wall Expansion cylinder Bracket Washer Spring washer Hexagonal nut 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...
  • Page 32 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 unpacking 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.

  • Page 33: Wiring The Digiwatts Unit

    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. WARNING! Before connecting or operating the Digiwatts unit, read all of the instructions, cautions, and warnings on the Digiwatts unit, the PV...
  • Page 34 WARNING! Always turn OFF all switches in the PV system before connecting any wires to or disconnecting any wires from the Digiwatts unit. 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.

  • Page 35: Sequence Of Connecting

    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.

  • Page 36: Opening The Digiwatts

    5.2 Opening the Digiwatts 1) Remove the four machine screws and lock washers from the housing cover and smoothly pull the cover forward 4 to 6 inches to access cables connected to front cover. 2) Disconnect the three connections on the front cover LCD display board.
  • Page 37 Figure 5-2 (b) Front Cover Electrical Connections Installation Guide RN5000US Apr 13...

  • Page 38: Wiring The Ac Output

    Figure 5-2 (C) Details of 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. Figure 5-3 shows an overview of the AC wiring. In some installations, the AC breaker can be utilized as the AC disconnect.

  • Page 39: Ac Connection Requirement

    Figure 5-3 AC Wiring 5.3.1 AC Connection Requirement 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.

  • Page 40: Connecting The Ac Wires

    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 grid in the order described in this...

  • Page 41: Wiring The Dc Input

    Protection Circuit Loop Figure 5-4 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. Figure 5-5 shows sample DC wiring for a single string. Figure 5-6 shows a simplified wiring diagram of a PV system with four strings.

  • Page 42: Dc Connection Requirements

    Figure 5-5 Single String Diagram 5.4.1 DC Connection Requirements WARNING! 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 installations must be done in accordance with applicable Canadian standards. WARNING! Use #10 AWG, 105 °C, copper wire for all DC wiring connections to the Digiwatts.
  • Page 43 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.
  • Page 44 Figure 5-6 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 ---Identical alignment ---Identical tilt  The maximum length of DC connecting cables should not exceed 30m as required by the EMC Directive.

  • Page 45: Connecting The Dc Wires

    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. 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.

  • Page 46: Communication Wiring

    Note: Polarity is opposite for each MPPT input Figure 5-7 DC Connection 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.

  • Page 47: Rs485 Communication

    5.5.1 RS485 Communication RS485 is a communication standard for bidirectional transmission of data between one or more Digiwatts units and a PC. Figure 5-8 Communication Wiring Wiring procedure: 1) A resistance with 120Ω is connected at the initiating terminal of RS485 bus.

  • Page 48: Closing The Digiwatts Unit

    NOTICE! RS485 bus requirements to ensure quality of communication:  Shielding twist-pair type  Shielding layer of RS485 bus should be single-point grounding to avoid ground loops. 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 that everything is in the right place and that all connections and knockout fittings are secure and properly torqued.
  • Page 49 Use the following procedure to replace the cover on the Digiwatts unit: 1) Secure the three connections with the appropriate mating connectors on the LCD board. 2) 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.
  • Page 50 Figure 5-9 Closing the Digiwatts unit Installation Guide RN5000US Apr 13...

  • Page 51: Commissioning

    Commissioning WARNING! 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! Follow the steps in the commissioning procedure in the order they are presented.
  • Page 52 Information If there is adequate solar irradiation and the resulting PV input voltage is 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.

  • Page 53: Displays And Messages

    Displays and Messages Each 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 ...

  • Page 54: Status Messages On The Lcd Display

    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 LED is on, the other two are off. The inverter has determined that there is enough voltage from the array to operate.
  • Page 55 LCD Display Parameters Parameter Description Table 7-1 Parameter Descriptions Item Parameter Description Model Inverter Model Grid Grid voltage and current Accumulated energy yield of the device since installation PV1 input voltage and current Fault Inverter fault (OK if none) Hour Total operating hours since installation Power Power fed to grid...

  • Page 56: Fault Messages On The Lcd Display

    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. 7.4 Operating Modes  Offset Offset calibration of the electronics (at start-up) ...

  • Page 57: Troubleshooting

    3. If the system problem persists, contact RENOVO POWER technical support at: 855-RENOVO1 (736-6861) In order to better assist you when contacting RENOVO POWER, please provide the following information: Required Information for Digiwatts Unit Service: ...
  • Page 58 Information Regarding the PV Modules:  Manufacturer name and model number of the PV module  Output power of the module  Open circuit voltage (Voc) of the module  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.

  • Page 59: Error Messages

    8.2 Error Messages If a fault occurs, the Digiwatts system generates an error message according to the operating mode and the detected fault. Fault Code Description Comm_un Communication error CPU_Err Cpu error EPROM_Err Eprom error Fan_Err Fan error Fre_H The frequency of the grid is too high Fre_L The frequency of the grid is too low HW_Cap...

  • Page 60: Technical Specifications

    Technical Specifications 9.1 Digiwatts Wiring Diagrams Installation Guide RN5000US Apr 13...

  • Page 61: Specifications

    9.2 Specifications Item Description Specification Maximum input voltage 550V Range of input operating voltage 100-550V Maximum input current (DC) 13A*2 Maximum array short circuit current (DC) 15A*2 Maximum utility backfeed current (AC) Output power factor rating (AC) Operating voltage range (AC) 215-265V Operating freq.

  • Page 62: Trip Limits / Trip Times

    9.3 Trip Limits / Trip Times Nominal Freq. (Hz) Trip Limit (Hz) Trip Freq. (Hz) Trip Times (s) >60.5 60.45 - 60.55 max. 0.1602 <59.3 59.25 - 59.35 max. 0.1602 Nominal Trip Voltages Voltage (V) Trip Limit Line-to-Neutral (V)* Trip Times(s) 119 - 121 max.

Table of Contents