GoodWe GW10K-EHA-G20

Single-phase hybrid inverter

GW10K-EHA-G20 is the 10 kW single-phase ESA power module. The August 2026 datasheet lists four PV trackers, a 350–550 V battery interface and distinct 10 kW AC, 13.5 kW maximum battery-charge and 11 kW discharge limits. The July 2026 system manual identifies a third-party EMS connector separately from the meter and battery wiring; its technical table lists Modbus RTU/TCP. An exact firmware-matched measurement map and interface configuration are still needed before reading values.

GoodWe GW10K-EHA-G20
  • Modbus RTU
  • Modbus TCP

Single-phase hybrid inverter

Compatibility

Documented third-party EMS interface with conditions

The exact ESA G20 manual includes GW10K-EHA-G20, identifies an EMS/EV charger communications port for third-party EMS, and lists Modbus RTU/TCP. The cited documents do not establish a safe exact-model point decoder or which optional communications hardware exposes each transport.

EMEA GW10K-EHA-G20 single-phase ESA G20 power module with approved GoodWe battery and meter/CT arrangement. Datasheet V2.1, 31 August 2026 and system manual V1.8, 28 July 2026. GW9.999K-EHA-G20, BHA AC-coupled and ETA three-phase models are separate. Read-only monitoring; no dispatch, grid-limit or battery-mode writes.

Connect it with

The installed single-phase GW10K-EHA-G20 has an available manufacturer-approved EMS port and matching RTU protocol

  • Modbus
  • Edge
  • Platforms
Single-phase hybrid inverter
Interface
Gateway
Edge
Output
GW10K-EHA-G20GW10K-EHA-G20 EMS connector
Isolated serial interfaceApproved RS-485-to-host adapter
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeModbus client + register map
Customer platformMQTT · API · files
Modbus RTU · RS-485
Isolated serial
Runs locally
Optional onward data
The manual identifies a dedicated third-party EMS/EV charger port separately from meter and battery connections. Confirm actual pin assignment, serial settings, firmware map and allowed topology before attaching a client; the product also lists TCP but this path does not assume its optional network hardware. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
GW10K-EHA-G20Single-phase 10 kW ESA G20 with four MPPTsQualify the dedicated EMS route and exact firmware map before read-only monitoring.
GW9.999K-EHA-G20Separate 9.999 kW grid rating in the same datasheetDo not round its regional grid rating to the 10 kW ordering code.
GW10K-BHA-G20 / GW10K-ETA-G20AC-coupled / three-phase familiesDo not transfer ESA EHA wiring or battery/PV ratings.

Specifications

Model scope
GW10K-EHA-G20, single-phase 220/230/240 V L/N/PE; 10 kW nominal output2
PV sizing
20 kW maximum listed PV input and 600 V absolute maximum; standby above 560 V until voltage falls2
PV trackers
Four MPPTs, one string each, 20 A operating and 26 A short-circuit maximum per tracker2
Battery
One LiFePO4 battery interface, 350–550 V; 35.6 A maximum continuous charge and 29.0 A discharge current2
Battery power
13.5 kW maximum charge, 11.0 kW maximum discharge; limits depend on approved battery and conditions2
Backup
10 kVA nominal; 20 kVA for 10 seconds and 14.5 kVA bypass rating are distinct conditional limits2
Communications
EMS/EV charger port is separate from meter, battery and parallel connectors; Modbus RTU/TCP are listed protocols23
Enclosure
IP66, natural convection, -35 to +60 °C with derating above +40 °C2

Interface

Documented measurements and integration boundaries for GW10K-EHA-G20.

  • PV string current monitoring, internal CT/site-meter and battery-system data are separate sources. Preserve their physical and signed-power boundaries.
  • The system manual allows third-party EMS at a dedicated port; meter RS-485, battery BMS and parallel wiring retain their assigned roles.
  • No exact GW10K-EHA-G20 register/decoder is offered here, and the datasheet’s RTU/TCP labels alone do not choose an installed communication module.

Assessment

Exact EMEA GW10K-EHA-G20 with approved battery/meter topology; documentary protocol compatibility only, no physical Edge test or prepared decoder.

InteroperabilitySupported with conditions
Dedicated third-party EMS connector and Modbus RTU/TCP are documented, but transport hardware and exact point map must be verified.23
AccuracyLimited
PV string current and system meter/battery roles are documented; exact external register units, signs and unavailable values remain unresolved.23
SecurityNot yet assessed
The retained ESA documents do not establish authentication, encryption or write restrictions for the installed third-party Modbus interface.
ReliabilitySupported with conditions
The manual covers fault handling, backup and monitoring setup; correct meter/CT and battery wiring are prerequisites.3
RuggednessSupported with conditions
IP66, ambient and altitude limits are documented with temperature/altitude derating.2
ScalabilityLimited
Parallel and meter arrangements are documented, but third-party client counts and polling budgets are not established.3
LifecycleSupported with conditions
Dated 2026 manual and datasheet distinguish exact EHA/BHA variants and support later firmware-specific review.23

Setup

  1. Read the full GW10K-EHA-G20 label, grid region, inverter/communications firmware and installed GoodWe battery modules.

    Keep the 9.999K variant distinct.

  2. Check the four PV tracker strings against voltage and current limits.

    The 20 kW PV input figure does not increase the 10 kW AC rating.

  3. Confirm the battery, backup circuits and built-in CT or external meter configuration.

    The manual treats these as system control inputs, not spare measurement buses.

  4. Find the manual’s EMS/EV charger communications port and identify whether the installed equipment exposes RTU or TCP, required settings and allowed third-party use.

    Keep battery, meter and parallel links untouched.

  5. Obtain the current exact-model EMS measurement map.

    Check firmware, address convention, function, widths, scaling, signed direction and unavailable values before adding any read-only points.

  6. Compare fresh PV, battery and grid-flow observations with SEMS+ and a known meter condition.

    Leave control, dispatch and export-limit writes outside this monitoring setup.

Common questions

Is the 20 kW PV input rating 20 kW of AC export?
No. The exact GW10K-EHA-G20 column lists 20 kW maximum PV input and 10 kW nominal AC output. They size different sides of the inverter.2
Can an installer use the meter RS-485 port for a third-party client?
The manual assigns the meter and EMS connectors different roles. Qualify the EMS/EV charger port and leave the configured meter or CT path intact.3
Does listed Modbus TCP guarantee every unit has an Ethernet server?
No. The installed communications hardware, configuration and firmware must match the manufacturer protocol. The datasheet lists protocols but does not specify a universal TCP endpoint.23

Sources

  1. ESA 3–10 kW EMEA product page (opens in a new tab) GoodWe
  2. ESA single-phase datasheet V2.1, 31 August 2026 (opens in a new tab) (PDF) GoodWe
  3. ESA 3–10 kW system user manual V1.8, 28 July 2026 (opens in a new tab) (PDF) GoodWe

Further reading

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