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GoodWe ESA GW12K-ETA-G20 (12 kW three-phase all-in-one)
GoodWe Hybrid Inverter

GoodWe ESA GW12K-ETA-G20 (12 kW three-phase all-in-one)

The 12 kW tier of GoodWe's 2026 three-phase all-in-one family: the same pre-wired inverter+battery tower, 5-108 kWh stackable storage, whole-home backup via internal bypass and automatic EMS — sized for larger households and small commercial loads.

  • Whole-home backup without an external transfer switch — internal 63 A bypass, <4 ms switchover, up to 6 kW unbalanced on one phase
  • Stacks up to 12 battery modules (5.12/6.0/8.32/9.0 kWh) to 108 kWh; mixing old and new modules is supported
  • 200% PV oversizing: up to 24 kWp on the 12 kW unit across 4 MPPTs (21 A per string)
  • VDE-AR-N 4105 + EN 50549 certified (TUV Rheinland) · German PV-wholesale stock · request a quote
Three Phase
Phase
LFP (LiFePO4)
Cell chemistry
IP66
Ingress protection
Manufacturer
GoodWe
Model code
GW12K-ETA-G20
Item no.
DLK-GOODWE-GW12KETAG20
Delivery
Germany delivery estimate: EUR 39–90 · The final delivery charge is included in your Proforma.
Orderable · lead time confirmed after order

Plan with GW12K-ETA-G20

New system, extension or replacement? Linker Advisor starts from this article and asks only for what is still open — existing model, quantity, postcode, installation date.

Trade price
Sign in for partner pricing Download datasheet
Required to install — not in the box
GoodWe GM3000 The ESA controls self-consumption and export limiting from a grid-point measurement; in GoodWe three-phase systems this is a GoodWe smart meter with clip-on CT. Confirm which meter/CT variant is already in the scope of delivery of your ESA order before adding one.
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GoodWe GM330 CT-based alternative where the service is too large for direct metering or the meter must sit in an existing distribution board. It is also one of the two meters GoodWe names for generator integration (GMK330 or GM330 per the ESA user manual).
View

Figures transcribed from the manufacturer datasheet on file. Confirm your grid code and configuration with our engineers before ordering.

  • GoodWe · SAJ · Pylontech · EcoFlow · Chint paired from the maker’s own lists
  • Datasheets on file for every item
  • Within 24 h engineering response
  • MOQ 1 unit · EU delivery
  • Engineering-checked configurations
Cabinet in, system done
System logic

Cabinet in, system done

Inverter, battery and backup in one enclosure: fewer wall penetrations, faster commissioning, one warranty channel.

Whole-home backup without an external transfer switch — internal 63 A bypass, <4 ms switchover, up to 6 kW unbalanced on one phase
Stacks up to 12 battery modules (5.12/6.0/8.32/9.0 kWh) to 108 kWh; mixing old and new modules is supported
200% PV oversizing: up to 24 kWp on the 12 kW unit across 4 MPPTs (21 A per string)
4S system — Silent · Smart · Secure · Simple
Headline feature

4S system — Silent · Smart · Secure · Simple

GoodWe positions the ESA as its '4S' all-in-one and calls it the first TUV-certified low-noise residential integrated system: operating noise as low as 30 dB at 25 C ambient on the 5-8 kW classes, achieved with a three-layer quiet design (custom low-noise fan, real-time smart temperature control, and an industry-first ultra-silent mode).

In pictures

Inspect it before you spec it.

Official renders, installation photos and system panels for this model line.

Official manufacturer product render
Product

Official manufacturer product render

Documentation

Specifications

Every value exactly as published in the official GW12K-ETA-G20 documentation.

Rated / max. power12 kW rated and max (GW12K-ETA-G20). Family: 8 / 10 / 12 / 15 kW in this catalogueseries spans 5-30 kW
Rated current at 400 V17.4 A per phase (3L/N/PE, 220/380 V or 230/400 V, 50/60 Hz)
Max. apparent power from grid (passthrough)43.5 kVA — the internal 63 A bypass carries the whole-house load through the unit, so no external transfer switch is needed (5-20 kW classes)
Backup nominal apparent power12 kVA
Backup max. apparent power (off-grid)13.2 kVA continuous (24.0 kVA for 10 s)
Backup max. current (off-grid)27.3 A
Max. unbalanced single-phase output6 kW on one phase (GW12K-ETA-G20, per user manual)
On/off-grid switching time<4 ms
Power factor / THDi0.8 leading - 0.8 lagging / THDi <3%
Max. PV input power24 kW (200% oversizing vs. 12 kW AC)
Max. input voltage1000 V (standby above 950 V)
MPPT operating voltage range120-950 V; start-up 150 V; nominal input 750 V
Number of MPPTs / strings4 MPPTs, 1 string per MPPT
Max. MPPT current / short-circuit current21/21/21/21 A / 26 A per MPPT
Battery type / voltage windowLFP (LiFePO4)700-950 V in the three-phase system, nominal 750 V, one battery input
Max. charge / discharge power12.0 kW / 13.2 kW (GW12K-ETA-G20)
Max. continuous charge / discharge current16.1 A / 17.7 A
Module optionsGW5.1-BAT-D-G20/G21: 5.12 kWh rated / 5.01 kWh usableGW8.3-BAT-D-G20/G21: 8.32 / 8.01 kWh · GW6.0-BAT-D-G20: 6.0 / 5.82 kWh · GW9.0-BAT-D-G20: 9.0 / 8.72 kWh
ScalabilityUp to 12 modules per system (max 6 per single stacked column) — up to 108 kWhmixing of different capacities and old/new modules supported
Module cycle life>=8,000 cycles (5.1 / 8.3 kWh modules)>=10,000 cycles (6.0 / 9.0 kWh modules) — lab conditions, 100% DoD, 25±2 C
Module protection & fire safetyIP66 modules, integrated aerosol fire extinguishingheating integrated on 6.0/9.0 modules (optional on 5.1/8.3) for charging down to -20 C
Module dimensions / weight800 x 326 x 270 mm per module57.5-79 kg depending on module
Max. efficiency98.1%
European efficiency97.2%
Max. battery-to-AC efficiency98.0%
Ingress protectionIP66 (system marketed for outdoor use in harsh environments)
Low-temperature operationReliable operation down to -20 C — battery heating module required for -20 C operation (integrated on 6.0/9.0 kWh modules)
NoiseAs low as 30 dB at 25 C ambient (5-8 kW classessmart fan cooling with ultra-silent mode)
Integrated protectionsPV string current monitoring, insulation resistance detection, residual current monitoring, PV/battery reverse polarity, anti-islanding, AC over-current/short-circuit/over-voltage, integrated DC switch, Type II DC SPD (Type I+II optional), Type II AC SPD, AFCI optional, remote shutdown
Full datasheet (PDF) Ask an engineer
ProductGoodWe ESA GW12K-ETA-G20 (12 kW three-phase all-in-one)

Complete the system

Balance-of-system and accessories paired with this model. Every pairing follows the manufacturer's official compatibility list.

Required
GoodWe GM3000 three-phase smart meter
[1]

GoodWe GM3000 three-phase smart meter

The ESA controls self-consumption and export limiting from a grid-point measurementin GoodWe three-phase systems this is a GoodWe smart meter with clip-on CT. Confirm which meter/CT variant is already in the scope of delivery of your ESA order before adding one.
View product →
GoodWe GM330 three-phase CT meter (large-mains alternative)
[2]

GoodWe GM330 three-phase CT meter (large-mains alternative)

CT-based alternative where the service is too large for direct metering or the meter must sit in an existing distribution board.It is also one of the two meters GoodWe names for generator integration (GMK330 or GM330 per the ESA user manual).
View product →
Recommended
Optional
GoodWe GMK330 smart meter (generator integration)
[1]

GoodWe GMK330 smart meter (generator integration)

Needed (GMK330 or GM330) when a backup generator should be controlled by the ESA and allowed to charge the battery, per the ESA user manual.
View product →
Approved pairings

What this unit is approved to run with.

Every pairing below traces to a manufacturer compatibility list, by document version and date. A pairing only one maker lists is marked; we quote it, an engineer confirms it.

GoodWe GW6.0-BAT-D-G20 (ESA battery module, 6.0 kWh) GoodWe GW6.0-BAT-D-G20 (ESA battery module, 6.0 kWh) Item no. DLK-GOODWE-GW60BATDG20 On GoodWe's compatibility list | 1-6 modules GoodWe GW9.0-BAT-D-G20 (ESA battery module, 9.0 kWh) GoodWe GW9.0-BAT-D-G20 (ESA battery module, 9.0 kWh) Item no. DLK-GOODWE-GW90BATDG20 On GoodWe's compatibility list | 1-6 modules

Pick the rating

GoodWe ESA family. Same engineering, different size.

4 ratings Same series, same engineering — your model is highlighted.
GoodWe ESA GW8K-ETA-G20 (8 kW three-phase all-in-one) Sign in for pricing
GoodWe ESA GW10K-ETA-G20 (10 kW three-phase all-in-one, current flagship) Sign in for pricing
GoodWe ESA GW12K-ETA-G20 (12 kW three-phase all-in-one) This model Sign in for pricing
GoodWe ESA GW15K-ETA-G20 (15 kW three-phase all-in-one) Sign in for pricing
Phase
Same across the family: Three Phase
Cell chemistry
Same across the family: LFP (LiFePO4)
Ingress protection
Same across the family: IP66
Operating temperature
Same across the family: -35~+60 °C
Weight
Same across the family: 34 kg
Dimensions
Same across the family: 800 × 340 × 270 mm

Every figure comes straight from the manufacturer's official datasheet.

Availability & compliance 1

Yes. TUV Rheinland has issued a certificate of conformity to VDE-AR-N 4105/11.18 and DIN VDE V 0124-100 (certificate A3 50706429 0001, dated 12.01.2026) that explicitly covers the GWxxK-ETA-G20 type range including the GW12K-ETA-G20.

  • Grid certificates: EN 50549-1 and EN 50549-2 certificates plus IEC 62109 and the EU Declaration of Conformity are published in GoodWe’s official ESA download centre (45 certificates listed)
  • Battery modules: carry IEC 62619, IEC 63056, IEC 60730, EN 62477, IEC 62040, CE and VDE 2510 listings per the datasheet
  • German market support: GoodWe runs a dedicated German site with the ESA Serie, a German datasheet and manual, and a German ESA cashback programme, this is an officially supported German-market product

Confirm the current certificate revision for your DSO registration at quote time.

Configuration 3

The ESA uses GoodWe’s stackable BAT-D-G20/G21 modules in four sizes: 5.12, 6.0, 8.32 and 9.0 kWh (usable 5.01 / 5.82 / 8.01 / 8.72 kWh).

  • System scale: up to 12 modules connect per system, maximum 6 per stacked column, for up to 108 kWh
  • Mixing modules: GoodWe explicitly supports mixing batteries of different capacities and combining old and new modules, so a system can start small and grow
  • Cycle life: the 6.0 and 9.0 kWh modules are rated >=10,000 cycles and have integrated heating for charging in freezing weather; the 5.1 and 8.3 kWh modules are rated >=8,000 cycles (heating optional on the G20 version)
  • Enclosure: all modules are IP66 with integrated aerosol fire extinguishing

Yes, whole-home backup is native.

  • Design: dual-port with an internal bypass (63 A passthrough on this class; if the customer keeps the existing main breaker, the breaker size is simply set in the SolarGo/SEMS+ app), so no external transfer switch or STS box is required
  • Switchover: under 4 ms on grid failure
  • Backup power: GW12K-ETA-G20 delivers 12 kVA nominal backup power and 13.2 kVA continuous (24.0 kVA for 10 s) off-grid
  • Unbalanced load: tolerates up to 6 kW of unbalanced load on a single phase per the user manual
  • Overload: covers motor and compressor starts for about 10 seconds at roughly twice nominal power

Per the ESA user manual, every ETA-G20 model can be connected to GoodWe AC charging piles (e.g. the HCA G2 wallboxes), so PV-surplus EV charging runs inside the same GoodWe ecosystem and SEMS+ app.

  • Generator support: built in; the ESA supports generator control and generator charging of the battery; GoodWe requires a GMK330 or GM330 smart meter for the generator connection

This makes a complete package of PV, storage, backup, EV charging and generator input from one vendor.

Operation & warranty 2

Inverter warranty

Under GoodWe’s European limited warranty (Rev 3.9, effective 5 March 2026), residential hybrid inverters including the ESA 5-30k series produced on or after 1 January 2026 carry a 10-year limited warranty (5 years for units produced earlier), starting from first installation or 12 months after production, whichever comes first.

Battery warranty

The ESA battery modules follow GoodWe’s battery warranty policy, no model-specific capacity-retention figure is published for the BAT-D-G20 modules, so request the current battery warranty document with your quote.

GoodWe promotes the ESA as the first TUV-certified low-noise residential integrated system: operating noise as low as 30 dB at 25 C ambient on the 5-8 kW classes (WHO indoor night guideline is <=30 dB(A)), with a custom low-noise fan, real-time temperature control and an ultra-silent mode. The system is IP66-rated against dust and water for outdoor mounting and operates down to -20 C — note that -20 C operation requires the battery heating module, which is integrated in the 6.0/9.0 kWh modules and optional on the 5.1/8.3 kWh G20 modules.
Next step

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