GoodWe Inverter Integration Guide V1.12-draft - Mar 2021

Introduction 2

Install the CET Gateway 2 Power the Gateway from the inverter’s “Back-up” circuit 2 Single Phase Site 3 Three Phase Site 4 Gateway Installation Procedure 5

Configuring the inverter 6 Battery configuration via Goodwe PV Master 6 MODBUS over RS485 11

Goodwe connection 13 EM Series Inverter 13 SBP Series Inverter 14 ES Series Inverter 15 ET Series Inverter 16 NS & DT Series Inverter 17 MS Series Inverter 22 SMT and MT (30kW and lower) Series Inverter 24 MT (50kW and higher) Inverter 25

CET Gateway connection 26

Multiple Goodwe Inverters 27

Request Assistance 28

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Introduction GoodWe power meters are not required when integrating GoodWe PV inverters with the CET Gateway. If the GoodWe inverter controls a battery or you need to control the solar production (i.e. Export limited sites), then the GoodWe inverter must be connected to the CET Gateway using a communication cable (Modbus over RS485). If control of a battery or solar production is not required, the total solar production can be measured using CT(s).

Install the CET Gateway NOTE: Back-up circuit - only applicable for hybrid (solar & battery) or battery inverters. For solar only inverters, please wire the Gateway using the regular instructions provided with the CET Gateway

Power the Gateway from the inverter’s “Back-up” circuit To ensure continuity of service during grid outages, a back-up circuit from the Inverter must be connected to the Gateway Kit power supply. Note that the back-up power supply connection cannot be used by the Gateway to perform power metering, because the Inverter introduces a phase offset to the back-up circuit output relative to the grid supply. To ensure the power metering function of the Gateway works correctly, separate phase references from the grid-side of the Inverter must be provided to the Gateway as shown in the wiring diagrams below. Updates to the AS/NZS 3000 wiring rules introduced in 2018 require all sub-circuits in a home to be protected by an RCD (in series with an MCB) or an RCBO. As the back-up circuit services a subcircuit in the home, RCCB protection is required at the back-up output of the GoodWe inverter in the switchboard. Note: Installation of RCD at the grid interactive port on any GoodWe storage inverter is prohibited by AS4777.1. The Gateway Kit also requires RCD protection under the new rules. This protection can be provided by the same RCD that protects the back-up circuit, however the Gateway requires an over-current protection device (MCB or RCBO) with a trip current of 10A or less.

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Single Phase Site

In Single Phase installations a 2-pole RCBO can be used to provide RCD protection to the entire back-up circuit, and an MCB with a trip current ≤10A can be used to limit the fault current to the Gateway Kit. The RCD-protected back-up circuit should be connected to the Gateway Kit power supply to ensure the Gateway will continue to operate when the grid is offline and the Inverter is in back-up mode. A separate RCD-protected line from the grid side of the Inverter should be connected to the ‘A’ terminal block in the Gateway Kit. This provides a voltage reference for power metering in the Gateway that is tied directly to the grid supply and does not get phase-shifted by the Inverter back-up circuit electronics. Note: the Gateway measures voltage between line and Earth. The MCB servicing the Gateway Kit should be selected such that the Gateway Kit can be completely isolated with a single switch. When re-configuring the Gateway Kit as shown in the image above, the black filter module should be disconnected from the Gateway Kit power supply input, and the terminations made safe.

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Three Phase Site

In Three Phase installations the Gateway Kit requires a connection to all three phases from the grid-side of the Inverter in order to perform accurate metering of the whole site. An RCD-protected back-up circuit should be connected to the Gateway Kit power supply to ensure the Gateway will continue to operate when the grid is offline and the Inverter is in back-up mode. The diagram above shows an installation using a single-phase Inverter. If a three-phase Inverter is used, connect any phase of the three-phase back-up output to the Gateway Kit power supply. Separate RCD-protected lines from the grid side of the Inverter should be connected to the ‘A’, ‘B’, and ‘C’ terminal blocks in the Gateway Kit. This provides a voltage reference for power metering in the Gateway that is tied directly to the grid supply and does not get phase-shifted by the Inverter back-up circuit electronics. Note: the Gateway measures voltage between line and Earth. Each of the line inputs to the Gateway Kit must be protected by an RCD, as well as by an MCB with a trip current of 10A or less. The MCB servicing the Gateway Kit should be selected such that the Gateway Kit can be completely isolated with a single switch. When re-configuring the Gateway Kit as shown in the image above, the black filter module should be disconnected from the Gateway Kit power supply input, and the terminations made safe.

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Gateway Installation Procedure Follow the Gateway Installation and onSite App - Quick Guide provided with the Gateway kit to install the CET Gateway with internet backhaul. Once this is complete, using the CET OnSite App, click the “Help-About” option in the header and then “Request assistance”. This will alert a CET staff member who will complete the configuration of your site.

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Configuring the inverter

Battery configuration via Goodwe PV Master NOTE: Make sure the Combined Energy Gateway is not connected to the inverter while configuring the inverter/battery. If the RS485 cable is already connected, power off the Gateway. NOTE: The NS/DT series does not support PV master, you must use the screen on the inverter: Click here for documentation

● Install the the GoodWe smart phone app “PV Master” ● Find and connect to the GoodWe inverter’s wifi hotspot “SolarWifi*” (“*” = the last 8 numbers of

the inverter serial number). The password is “12345678”

Once connected to the WIFI hotspot, open “PV Master”. Your inverter should be automatically selected. If not - click the menu “hamburger” in the top right and select your inverter from the list. Select “Set” in the bottom right to open the “Setting” menu.

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Open the “Basic Setting” option, and login using the password “goodwe2010”

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● QLD users should select “Australia Energex” or “Australia Ergon” ● WA users should select “Australia WA” ● All others should select “Australia”

Click “Next”. NOTE: In updated versions, “Australia” etc may appear under “Oceana”.

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Continue through the settings options until you find the “Battery Model” option.

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Select the appropriate battery option For a single 3.5 BYD module, select Battery-Box L 3.5 For two 3.5 BYD modules, select Battery-Box L 7.0 or Battery-Box L 7.0+ For three 3.5 BYD modules, select Battery-Box L 10.5 or Battery-Box L 7.0+ NOTE: After changing the settings the app will ask you to “reset the equipment”. Just click on the “Yes” option, and the inverter will automatically reset.

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MODBUS over RS485 This requires a custom RS485 cable to be constructed from double insulated (CBUS pink) CAT5e cable and 2 RJ45 connectors. The installer will need tools and materials to make up the custom RS485 cable. The RJ45 connector at the CET Gateway expansion bus uses the TIA-568B ethernet wiring standard. The RJ45 connector that is plugged into the GoodWe Inverter uses pins 1 and 2. A GND connection is not required. !NOTE for the Goodwe NS/DT series, do not create the RS485 connector. See the NS & DT Series Inverter section below.

!NOTE for long cable runs over over 100m, please request assistance. !NOTE The DC bus must be connected to the Inverter before Modbus communications will work.

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!NOTE The DC bus must be connected to the Inverter before Modbus communications will work.

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Goodwe connection

EM Series Inverter Use the Back-Right port marked “Reserved RS485” / “EMS”

Plug the other end of the cable into one of the two Expansion Bus RJ45 ports on the top of the Gateway:

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SBP Series Inverter Use the Back-Left port marked “Reserved RS485” / “EMS”

Plug the other end of the cable into one of the two Expansion Bus RJ45 ports on the top of the Gateway:

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ES Series Inverter Use the Front-Right port marked “Reserved RS485” / “EMS”

It is recommended to crimp a new cable for ES series inverters rather than using the existing gray cable that is shipped with the inverter. The Goodwe-supplied cable has a non-standard pinout which can cause confusion. Plug the other end of the cable into one of the two Expansion Bus RJ45 ports on the top of the Gateway:

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ET Series Inverter Connect to the RJ45 port under the Back-Right entry marked “EMS”. The RJ45 pinout should be as shown in the diagram above.

Plug the other end of the cable into one of the two Expansion Bus RJ45 ports on the top of the Gateway:

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NS & DT Series Inverter Eg GW3000-NS, GW5000D-NS, GW4000-DT, GW5000L-DT, GW5K-DT etc. Do not create a connector for the Goodwe inverter side. Instead:

1. Remove the WiFi cover

2. Pull the cable (without connector) through the DRED slot/gland

3. Wire Brown and Brown White into the green connector provided by Goodwe a. Example using 2-pin connector:

b. If a 6-pin connector is provided with the Goodwe inverter, use the right-most 2

positions on the connector.

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4. Locate the RS485 connector a. NS series: below the USB port, there is a 6 pin terminal:

!NOTE The DC bus must be connected to the Inverter before Modbus communications will work.

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b. DT series: there is usually a 2 pin terminal on either side of the USB port

Some DT inverters use a different style of card:

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c. GW5K-DT: In new DT inverters the 'Meter' and 'RS485' ports are combined into the same 2-pin connector:

Pin 1 = Meter+ = CET brown Pin 2 = Meter- = CET brown-white

5. Plug the green connector into either the top A & B or the bottom A & B position

6. Replace the WiFi cover and tighten the DRED gland !NOTE The DC bus must be connected to the Inverter before Modbus communications will work.

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7. Plug the RJ45 end of the cable into one of the two Expansion Bus ports on the top of the Gateway:

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MS Series Inverter Installation Guide: https://www.goodwe.com/Public/Uploads/sersups/MS%20Series%20User%20Manual.pdf

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Plug the other end of the cable into one of the two Expansion Bus RJ45 ports on the top of the Gateway:

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SMT and MT (30kW and lower) Series Inverter 1. Find the 6 pin connector in the inverter kit 2. Wire Brown into position 1 and Brown-White into position 2 3. Connect the 6 pin connector into the “RS-485” port on the inverter

Detailed RS485 connection information for SMT/MT series inverters can be found on page 14 of the SMT User Guide: https://www.goodwe.com/Public/Uploads/sersups/SMT%20USER%20MANUAL.pdf The following image summarises the standard connection options for these inverters:

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MT (50kW and higher) Inverter The connection steps of RS485 communication of MT series are as follows:

1. Remove the waterproof kit of RS485 cover by a screwdriver. 2. Remove the screw cap of the cable gland. 3. Remove the one-hole sealing ring. 4. Insert the RS485 cable through the components as follows: screw cap, one-hole sealing ring,

insulation body and sheet metal parts. 5. Fasten the cable (shown below) 6. Connect the compressed cable to the built-in communication interface. 7. Fasten the RS485 waterproof kit to the inverter. 8. Fasten the screw cap of the cable gland.

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CET Gateway connection The standard TIA-568A or TIA-568B end goes into the CET Gateway as shown below:

There are two RJ45 Expansion Bus ports on the CET Gateway, it does not matter which one is used. If there are multiple inverters to connect to the Gateway RS485 bus, it is OK to connect two separate cables (one from each inverter) to both ports as the RS485 lines are connected in parallel between both connectors.

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Multiple Goodwe Inverters Inverters can be “chained” together by splicing the brown and brown-white cables. If multiple inverters are being used at a site it is necessary to configure each inverter with a unique MODBUS unit ID. The default MODBUS ID for Goodwe ES and NS is 247, which is a special reserved value that should only be used if there is just 1 inverter at the site. If multiple Goodwe inverters are installed on the same RS485 bus, the first inverter’s Communication Address should be set to 246, and every subsequent inverter should be assigned the next-highest address. E.g: Goodwe #1: ID 246 Goodwe #2: ID 245 Goodwe #3: ID 244 … and so on.

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Request Assistance If you haven’t already, using the CET OnSite App, click the “Help-About” option in the header and then “Request assistance”. This will alert a CET staff member who will complete the configuration of your site.

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