Renovo Digiwatts RN3000US User manual

PV Grid-connected Inverter
Digiwatts RN3000US
Installation Guide
Copyright © Renovo Power Systems. All rights reserved. (Rev 1.3)

Installation Guide RN3000US Apr 2013 1
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exclusion may not apply.)
Specifications are subject to change without prior notice. We make
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Power Systems reserves the right to make changes without notice and
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Renovo Power Systems LLC
416 W. Huron St., STE 20
Ann Arbor, MI 48103
Tel: 855-RENOVO1 (736-6861) Fax: [phone]
http://www.renovo-usa.com
Renovo Power Systems (Shanghai) Co., Ltd.
3rd floor , Haiye Building, No.518, Fengpu Av., Fengxian,
Shanghai,China
Tel: [phone]*002 Fax: [phone]
http://www.renovo-power.com

Installation Guide RN3000US Apr 2013 2
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions for Model RN3000US 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!
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 RN3000US Apr 2013 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.
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
ETL is the standard applied by Electrical Testing Laboratories to the
Digiwatts system to certify that it meets the requirements of the
highest safety criterion of the USA and Canada.

Installation Guide RN3000US Apr 2013 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.
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.
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 RN3000US Apr 2013 5
Table of Contents
1 Introduction ...................................................................................................7
1.1 Validity ..................................................................................................7
1.2 Target Group ..........................................................................................7
1.3 Product Overview................................................................................8
1.4 Feature Overview .................................................................................12
1.5 Safety .................................................................................................12
1.5.1 Protection and Criterion ................................................................12
1.5.2 Safety Instructions.....................................................................14
1.5.3 Symbols on the Type Label........................................................16
1.6 Installation Overview .............................................................................17
2 Unpacking and Inspection...........................................................................18
2.1 Scope of Delivery ..................................................................................20
3 AC Voltage Configuration ............................................................................21
4 Mounting .....................................................................................................23
4.1 Choosing a Mounting Location ................................................................23
4.2 Dimensions and Required Clearances .....................................................25
4.3 Mounting Procedure ..............................................................................26
4.3.1
Mounting onto the wall ................................................................26
4.3.2 Mounting the Digiwatts Unit to the Bracket ......................................28
5 Wiring the Digiwatts unit..............................................................................29
5.1 Sequence of Connecting ........................................................................31
5.2 Opening the Digiwatts ...........................................................................32
5.3 Wiring the AC Output ............................................................................33
5.3.1 AC Connection Requirement ........................................................33
5.3.2 Connecting the AC Wires .............................................................34
5.4 Wiring the DC input ...............................................................................35
5.4.1 DC Connection Requirements ......................................................35
5.4.2 Connecting the DC Wires .............................................................37
5.5 Communication Wiring ..........................................................................38
5.5.1 RS485 Communication ................................................................38

Installation Guide RN3000US Apr 2013 6
5.5.2 Network communication..........................................................39
5.6 Closing the Digiwatts unit .......................................................................40
6 Commissioning ...........................................................................................41
7 Displays and Messages ..............................................................................43
7.1 LED Operation Indications .....................................................................43
7.2 Status Messages on the LCD Display ......................................................43
7.2.1 Activation of the LCD Backlight...............................................43
7.2.2 Switching interface..................................................................44
7.2.3 Operation interface .................................................................44
7.2.4 Time-power curve interface.....................................................45
7.2.5 Detail Information Interface.....................................................46
8 Troubleshooting ..........................................................................................47
8.1 General ...............................................................................................47
8.2 Error Messages ....................................................................................48
9 Technical Specifications ..............................................................................51
9.1 Specifications .......................................................................................51
9.2 Trip Limits / Trip Times ..........................................................................52
9.3 Torque Values and Wire Sizes ................................................................52

Installation Guide RN3000US Apr 2013 7
1 Introduction
1.1 Validity
This manual describes the assembly, installation, commissioning and
troubleshooting of the following Renovo inverter: Digiwatts RN3000US.
Information
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 RN3000US Apr 2013 8
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.
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.
Figure 1-1: Digiwatts System is installed in a Utility Interactive PV System
Information
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!
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.
PV Array Digiwatts
Meter
Utility Grid

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 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.
Figure 1-2 Electrical Block Diagram
DSP1 DSP2
Boost Full bridge
DC+
DC-
L
N
Relay1 Relay2
LCD