Description
High-power three-phase delivery with heavy-duty grid bypass.
GoodWe ESA GW12K-ETA-G20 is a 12 kW three-phase All-in-One hybrid inverter unit with 24 kWp solar intake and 63 A grid bypass, engineered to power multi-zone heat pumps and heavy residential loads in a cable-free vertical column.
12,000 W Continuous Three-Phase Power
Delivers robust three-phase output to handle simultaneous heavy induction cooking, heat pumps, and domestic appliances.
24,000 W Solar PV Input (200% Oversizing)
Double solar capacity captures abundant daytime energy to fill storage quickly while meeting daytime household consumption.
63 A High-Current Grid Bypass
Heavy-duty internal bypass contactor handles high domestic currents without tripping main fuses.
Cable-Free Column Stacking
Mounts directly atop BAT-D-G20 battery bricks with internal busbars, eliminating wall clutter and exposed conduits.
More product details
Built for large electrified residences, the GW12K-ETA-G20 carries high domestic current demands without bottlenecking main service lines, while providing sub-10 ms automatic backup power.
- Delivers 12,000 VA continuous three-phase power across L1, L2, and L3 during utility blackouts.
- 63 A continuous bypass allows high-draw domestic equipment (EV chargers, heat pumps, ovens) to run without tripping main fuses.
- Sub-10 ms automatic transfer ensures zero computer reboots or smart home controller resets.
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Double DC oversizing with furniture-grade column stacking.
Sized to absorb generation from extensive multi-aspect residential roofs, the GW12K-ETA-G20 captures high solar yields while mounting directly atop high-density battery modules with internal busbars. Internal push-in busbars pass high-voltage power and communication directly down the stack without external cables. Eliminates exposed high-voltage DC wiring on garage and utility room walls, maximizing residential safety. IP66 cast-aluminum casing certified for clean indoor utility rooms or sheltered outdoor walls (-35 to +60 °C).
Runs 13.2 kW battery discharge rate
Power circuits sustain 12.0 kW charging at 16.1 A and 13.2 kW discharging at 17.7 A into 700 to 950 V storage stacks.
Fits 4 separate 21 A trackers for 24 kW solar
Four independent inputs handle up to 24 kW of PV modules with 26 A short-circuit protection on each tracker.
Holds 24.0 kVA surge power for 10 s
Delivers 13.2 kVA continuous backup and sustains heavy motorized startup loads up to 24.0 kVA for 10 s.
Technical data
High-throughput All-in-One energy management engineered for large electrified residential estates.
24 kWp solar capacity with 12 kW continuous three-phase output in a modular tower.
Sized for large residential estates and multi-zone heating systems, the GW12K-ETA-G20 delivers 12,000 W continuous AC output across 3 balanced phases. It accepts up to 24,000 Wp of solar input, stacking directly on modular 314 Ah BAT-D-G20 battery bricks to provide high-power heating, vehicle charging, and full off-grid backup in a single vertical column.
- Continuous 3-Phase Power
- 12,000 VA
- 200% Solar DC Intake
- 24,000 Wp
- Heavy-Duty Grid Bypass
- 63 A
- External DC Cables
- Zero
Inverter: AC Output & Backup
- Rated / max. power
- 12 kW rated and max (GW12K-ETA-G20). Family: 8 / 10 / 12 / 15 kW in this catalogueseries spans 5-30 kW
- Rated current at 400 V
- 17.4 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 power
- 12 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 output
- 6 kW on one phase (GW12K-ETA-G20, per user manual)
- On/off-grid switching time
- <4 ms
- Power factor / THDi
- 0.8 leading - 0.8 lagging / THDi <3%
PV Input
- Max. PV input power
- 24 kW (200% oversizing vs. 12 kW AC)
- Max. input voltage
- 1000 V (standby above 950 V)
- MPPT operating voltage range
- 120-950 V; start-up 150 V; nominal input 750 V
- Number of MPPTs / strings
- 4 MPPTs, 1 string per MPPT
- Max. MPPT current / short-circuit current
- 21/21/21/21 A / 26 A per MPPT
Battery Interface & Modules
- Battery type / voltage window
- LFP (LiFePO4)700-950 V in the three-phase system, nominal 750 V, one battery input
- Max. charge / discharge power
- 12.0 kW / 13.2 kW (GW12K-ETA-G20)
- Max. continuous charge / discharge current
- 16.1 A / 17.7 A
- Module options
- GW5.1-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
- Scalability
- Up 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 safety
- IP66 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 / weight
- 800 x 326 x 270 mm per module57.5-79 kg depending on module
Efficiency
- Max. efficiency
- 98.1%
- European efficiency
- 97.2%
- Max. battery-to-AC efficiency
- 98.0%
System & Environment
- Ingress protection
- IP66 (system marketed for outdoor use in harsh environments)
- Low-temperature operation
- Reliable operation down to -20 C, battery heating module required for -20 C operation (integrated on 6.0/9.0 kWh modules)
- Noise
- As low as 30 dB at 25 C ambient (5-8 kW classessmart fan cooling with ultra-silent mode)
- Integrated protections
- PV 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
Project fit
Where this model fits.
Scenarios that show which projects the GoodWe ESA GW12K-ETA-G20 (12 kW three-phase all-in-one) belongs in, what to verify before quoting, and when another model is the better pick.
Large Estates with Multi-Zone Heat Pumps & Domestic EV Wallboxes (15–20 kWp PV)
Luxury single-family properties with extensive daily electricity consumption requiring continuous high-rate power throughput.
12 kW continuous AC output easily powers multi-zone air-to-water heat pumps and domestic baseline circuits simultaneously, while 24 kWp solar intake ensures fast battery charging on cloudy winter days.
- BoundaryIf total solar array size is under 15 kWp and peak continuous household demand stays under 10 kW, step down to the 10 kW unit to save capital cost. ---
- If total solar array size is under 15 kWp and peak continuous household demand stays under 10 kW, step down to the 10 kW unit to save capital cost. ---
Documents
GoodWe ESA Series 5-30kW Datasheet (EN)Product questions
What is the maximum solar string voltage and current supported by this 12 kW unit?
1,000 V DC max input voltage; supports high-power modern residential strings. The GW12K-ETA-G20 operates across a wide 200–850 V MPPT window (1,000 V max input), allowing long series strings that minimize conduit runs. Its dual MPPT channels accommodate modern high-power bifacial solar modules without thermal current throttling.
What is the benefit of the All-in-One format over separate wall-mounted inverters and batteries?
Saves wall space, eliminates exposed high-voltage conduits, and cuts installation time by 50%. Traditional split installations require mounting heavy hardware across 2 to 3 meters of wall space with external DC isolators and conduits. The ESA G20 stacks everything vertically into a single 0.25 m² footprint, using internal busbars for an ultra-clean, furniture-grade finish.
System components
Required components
GoodWe GM3000 three-phase smart meter
Item number: DLK-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.
GoodWe GM330 three-phase CT meter (large-mains alternative)
Item number: DLK-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).
Recommended components
GoodWe GW6.0 / GW9.0-BAT-D-G20 battery modules
Item number: DLK-GOODWE-GW60BATDG20
Storage scales purely by stacking modules, up to 12 per system (max 6 per column) to 108 kWh, and GoodWe explicitly allows mixing capacities and old/new modules. The 6.0 and 9.0 kWh G20 modules are the >=10,000-cycle versions with integrated heating for winter charging.
GoodWe HCA G2 GW11K-HCA-20 EV charger
Item number: DLK-GOODWE-GW11KHCA20
The ESA user manual lists GoodWe AC charging piles as directly connectable. The 11 kW HCA G2 charges the car from PV surplus and shares the same SEMS+ app as the ESA, completing the home-energy package.
Optional components
GoodWe GMK330 smart meter (generator integration)
Item number: DLK-GOODWE-GMK330
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.
Approved pairings
GoodWe GW6.0-BAT-D-G20 (ESA battery module, 6.0 kWh)Item number DLK-GOODWE-GW60BATDG20GW6.0 / GW9.0-BAT-D-G20 modules; a single string stacks up to 6 (manual p69), 12 units system-wide. The number of parallel stacks is NOT printed - 12/6 would be an inference, so quote multi-stack designs conservatively.
GoodWe GW9.0-BAT-D-G20 (ESA battery module, 9.0 kWh)Item number DLK-GOODWE-GW90BATDG20GW6.0 / GW9.0-BAT-D-G20 modules; a single string stacks up to 6 (manual p69), 12 units system-wide. The number of parallel stacks is NOT printed - 12/6 would be an inference, so quote multi-stack designs conservatively.