GoodWe GW10K-ET-20

Compatibility

Documented monitoring interface with conditions

Use the manufacturer’s local monitoring interface and an exact installed-device mapping. No physical validation or prepared Edge import is claimed.

Exact GW10K-ET-20, ET G2 high-voltage three-phase hybrid, using the global ET G2 datasheet V2.1 and current residential solution manual V2.2 dated 30 September 2026. The original GW10K-ET, low-voltage ET-L and commercial ET G10 platforms are separate. GoodWe publishes a hybrid-family Modbus EMS protocol; confirm its applicability and available fields for the installed inverter and communication firmware. No exact-model register import or physical integration is supplied. Third-party EMS is not supported in the documented parallel arrangement.

Connect it with

• 
  Modbus Interface ZMB-3X
  From €399 ex VAT Configure Modbus Interface
• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Models

Specifications

The headline 10 kW is the nominal AC output, not the maximum PV-array or battery charging figure. Size each side separately and apply the datasheet’s regional footnotes, battery compatibility list and installation limits.²

Nominal AC output

10,000 W, three-phase 380/400 V, 3L/N/PE, 50/60 Hz.²

PV inputs

Three MPPTs, one string per tracker; 16 A operating and 24 A short-circuit current per MPPT.²

PV voltage

1000 V absolute input maximum; 120–850 V MPPT range. The datasheet states 950 V maximum operating voltage for the 1000 V system.²

PV input-power figure

16,000 W for the global GW10K-ET-20 column; the oversizing figure is not a continuous 16 kW AC output rating.²

Battery

One high-voltage lithium-ion interface, 150–720 V range, 500 V nominal; maximum continuous charge/discharge current 40 A.²

Battery conversion limits

Maximum charging power 15,000 W and discharging power 11,000 W in this datasheet; actual output depends on the approved battery and operating conditions.²

Backup

10,000 VA nominal; up to 18,000 VA for 60 seconds without grid, only with sufficient PV and battery power.²

Mounting and environment

Wall mounting, 496 × 460 × 221 mm, 25 kg; IP66, −35 to +60 °C with installation/derating conditions.²

Protection options

Type II surge protection on DC and AC sides; AFCI 3.0 is optional, not guaranteed on every installed order.²

Interface

Documented measurements and integration boundaries for GW10K-ET-20.

• PV, battery, inverter and grid-meter values represent distinct energy boundaries; retain the source of each measurement.
• GoodWe’s hybrid-family EMS protocol defines read-only operating and fault data, including identity and measurements. Confirm exact firmware coverage before creating points.
• The external model-name field is distinct from the shorter field marked only for EH/ET PLUS in the protocol; do not use a partial model string to qualify ET G2 automatically.
• No model-specific address, energy multiplier or template is asserted by this guide.

Setup

1. Confirm the -20 generation

   Read GW10K-ET-20 from the nameplate and record inverter, ARM/DSP and communication-module firmware. Use the corresponding ET G2 documents and regional battery compatibility list. Do not substitute original ET or ET-L electrical ratings.

2. Record the complete power system

   Confirm PV tracker allocation, approved battery type, grid meter/CT arrangement and backup circuits with the installer. Verify the manufacturer system’s power directions before adding a separate monitoring client.

3. Check the parallel-system restriction

   The current solution manual states that third-party EMS devices are not supported in parallel scenarios. Do not add a second EMS master to a parallel system or assume a shared connector is unused.

4. Use the EMS port, not the meter or battery port

   Follow the exact model’s terminal diagram. The manual distinguishes EMS RS-485, meter RS-485, battery RS-485/CAN and parallel CAN/BUS. Connector shape alone does not identify Ethernet or a general-purpose monitoring interface.

5. Qualify the firmware’s read-only protocol

   GoodWe’s simplified V1.1.1 hybrid protocol documents FC03, 9600 bit/s and configurable addresses 1–247 with factory default 247. Confirm these against the installed release and supplier protocol before polling; a factory default is not the current site address.

6. Validate each field without enabling dispatch

   Start with identity and one supported measurement. Confirm wire address, data size/order, scaling and unavailable values using the installed protocol revision, then compare against the local manufacturer app. Keep control, battery-power and EMS-mode writes disabled. No prepared import is supplied.

Common questions

Can I use the meter RS-485 connection for Edge?

That port has a defined role in the inverter’s energy-management system. Use the documented EMS interface after checking the exact installation. Do not add another master to the meter bus or disconnect the meter to make space.³

Can a parallel ET G2 installation also use a third-party EMS?

The retained V2.2 manual explicitly excludes third-party EMS and charging-pile connections in the parallel arrangement. Obtain a manufacturer-supported architecture rather than assume the single-inverter EMS path applies.³

Does the optional network dongle guarantee Modbus TCP?

No universal dongle or firmware promise is made here. The hybrid-family protocol describes TCP port 502 and enabling Modbus through SEMS+, but the actual communication module, compatible firmware and site settings must be established separately. This guide’s connection path is the dedicated EMS RS-485 interface.⁴

Why is there no energy-register example?

The public protocol covers several hybrid platforms and some entries have model-specific notes. Exact ET G2 availability, representation and unavailable-value behaviour must be confirmed before a point is advertised as ready to import.⁴