Description
The GW8K-ETA-G20 is the 8 kW ESA G20 power module with three MPPTs: 16 kW maximum PV input, 21 A per tracker and a 63 A internal grid bypass.
GoodWe ESA GW8K-ETA-G20 (8 kW three-phase power module)
Stacked ESA G20 Design: The power module seats on BAT-D-G20 modules through the documented blind-mate connection.
16 kW Maximum PV Input: Three 21 A MPPTs, one string each, on this 8 kW model.
63 A Internal Grid Bypass: Whole-home passthrough on this 5-20 kW class.
8 kW Three-Phase Model: Smart Fan Cooling; operating noise as low as 30 dB at 25 °C for the 5–8 kW models.
8.8 kW battery discharge into a 700-950 V stack
One battery input. Charge 8.0 kW at 10.7 A, discharge 8.8 kW at 11.8 A, across 700-950 V (nominal 750 V, start-up 720 V). LFP (LiFePO4) on the BAT-D-G20 modules.
Three trackers on the 8 kW model
Three MPPTs, one string each, 21 A / 26 A Isc per tracker. Max PV input 16 kW, max DC voltage 1000 V, MPPT window 120-950 V, start-up 150 V.
IP66 enclosure and noise data
The GW8K-ETA-G20 has IP66 protection and Smart Fan Cooling. Operating noise for 5–8 kW models is as low as 30 dB at 25 °C ambient; the user manual lists a noise emission of up to 35 dB for this model group.
ESA Series
High-current grid passthrough with whole-home backup.
A 63 A internal bypass carries the house through this 8 kW power stage on the standard whole-home backup path. Backup rated apparent power is 8 kVA. Off-grid backup holds 8.8 kVA continuous and 16.0 kVA for 10 s. Switching is under 4 ms. IP66 enclosure, wall or floor mounted, operating range -35 to +60 °C.
Technical data
GoodWe ESA G20 · GW8K-ETA-G20 power module
- Rated 3-Phase Power
- 8 kW
- Maximum PV DC input
- 16 kW
- Internal Grid Bypass
- 63 A
- Backup Switching
- <4 ms
About these specifications
16 kW solar intake in a modular three-phase All-in-One column with 63 A grid bypass.
Designed as the power module for the ESA G20 modular column, the GW8K-ETA-G20 combines an 8 kW three-phase hybrid with 63 A internal bypass. It stacks on BAT-D-G20 LFP modules, takes up to 16 kW of rooftop PV on three MPPTs, and holds a 700-950 V battery window.
Backup switching <4 ms.
Inverter: AC Output & Backup
- Rated / max. power
- 8 kW rated and max (GW8K-ETA-G20). GoodWe ESA G20 series: 5–30 kW
- Rated current at 400 V
- 11.6 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
- Backup nominal apparent power
- 8 kVA
- Backup max. apparent power (off-grid)
- 8.8 kVA continuous (16.0 kVA for 10 s)
- Backup max. current (off-grid)
- 18.2 A
- On/off-grid switching time
- <4 ms
- Power factor / THDi
- 0.8 leading - 0.8 lagging / THDi <3%
PV Input
- Max. PV input power
- 16 kW (200% oversizing vs. 8 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
- 3 MPPTs, 1 string per MPPT
- Max. MPPT current / short-circuit current
- 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
- 8.0 kW / 8.8 kW (GW8K-ETA-G20)
- Max. continuous charge / discharge current
- 10.7 A / 11.8 A
- Module options
- GW5.1-BAT-D-G20/G21: 5.12 kWh rated / 5.0 kWh usable; GW8.3-BAT-D-G20/G21: 8.32 / 8.0 kWh; GW6.0-BAT-D-G20: 6.0 / 5.8 kWh; GW9.0-BAT-D-G20: 9.0 / 8.7 kWh; usable-energy test: GW5.1/GW8.3 G20/G21 at 100% DoD, 0.2P, 25 ± 2 °C; GW6.0/GW9.0 G20 at 100% DoD, 0.4P, 25 ± 2 °C; beginning of life; actual energy varies with use and conditions
- Scalability
- Different BAT-D-G20/G21 module models can be combined in one system, with up to six modules per column and a 5–108 kWh system range. The documented combination of GW5.1/GW8.3 G20 or G21 with GW6.0/GW9.0 G20 disables battery heating. Mixed systems with separate expansion require BMS and DCDC software V06 or above.
- Module cycle life
- ≥8,000 cycles on GW5.1-BAT-D-G20, GW8.3-BAT-D-G20, GW5.1-BAT-D-G21 and GW8.3-BAT-D-G21; ≥10,000 cycles on GW6.0-BAT-D-G20 and GW9.0-BAT-D-G20; laboratory test conditions apply
- Module protection & fire safety
- IP66 modules, integrated aerosol fire extinguishing; heating integrated on GW6.0/GW9.0 modules for charging down to -20 °C; GW5.1/GW8.3 G20 charges from -18 °C, G21 from +2 °C
- Module dimensions / weight
- 800 × 326 × 270 mm per module; 57.5-79 kg depending on module
Efficiency
- Max. efficiency
- 98.0%
- European efficiency
- 97.1%
- Max. battery-to-AC efficiency
- 98.0%
System & Environment
- Ingress protection
- IP66
- Low-temperature operation
- ETA inverter: -35 to +60 °C. Battery charging limits depend on the selected module and heating film. The documented mixed G20/G21 combination disables heating.
- Noise
- As low as 30 dB at 25 °C ambient (5-8 kW class)
- 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 GW8K-ETA-G20 (8 kW three-phase power module) belongs in, and the limits behind our engineers' recommendation.
Three-phase homes with a 16 kW roof on three string groups
A 230/400 V three-phase home with three PV string groups and an ESA G20 battery column beneath the power module.
The GW8K-ETA-G20 takes 16 kW of PV on three 21 A MPPTs, stacks on BAT-D-G20 modules in a 700-950 V window, and keeps whole-home backup on the 63 A internal bypass.
- PV max 16 kW, 3 MPPTs, 21 A each; battery 700-950 V; up to 6 modules in one column, 12 in the system.
Documents
Product questions
Can an 8 kW ESA stack be extended with a different BAT-D capacity?
Yes. The system supports battery capacity expansion, and the total battery capacity is determined by the quantity and specifications of battery modules. Configuration must strictly adhere to the restrictions specified in this section. The system supports 5-108kWh. A single column can stack up to 6 batteries. If there is more energy demand, or other scenarios requiring capacity expansion such as reducing the stacking height of a single column due to installation conditions, please contact GoodWe or a dealer to purchase a battery expansion kit.
What backup load can the GW8K-ETA-G20 design support?
The BACK-UP port off-grid load capacity table lists the GW8K-ETA-G20 in its first model group, together with the GW5K-ETA-G20, GW6K-ETA-G20, GW9.999K-ETA-G20, GW10K-ETA-G20, GW12K-ETA-G20, GW15K-ETA-G20 and GW20K-ETA-G20, and the GW5K-BTA-G20 to GW20K-BTA-G20 models. For this group the table gives: rated power of a single inductive load 1.1 kVA single-phase and 3.3 kVA three-phase; total rated power of multiple inductive loads 0.4*Pn/3 single-phase and 0.4*Pn three-phase; capacitive load 0.33*Pn/3 single-phase and 0.33*Pn three-phase; half-wave load 2 kW single-phase, with no value for three-phase.
Which meter and CT arrangement must be planned for this inverter?
Use the built-in meter with the CT provided with the inverter. CT ratio: 120A:40mA. If the built-in meter of the inverter does not meet usage requirements, contact a dealer to purchase a GMK330 or GM330 Smart Meter. GMK330: CT is not replaceable; CT ratio: 120A:40mA. GM330: the CT can be purchased from GoodWe or purchased separately; CT ratio requirement: nA/5A, where nA is the CT primary input current with n ranging from 200 to 5000, and 5A is the CT secondary output current. If more than 2 inverters are paralleled, or the wire diameter or measuring range of the standard CT does not meet the total current requirements of the on-site parallel system, use the GM330 Smart Meter. In the whole-house backup power scenario, there is no need to connect additional meters or CTs; simply set the "Meter Type" to "Built-in CT, External No Meter No CT" in the App to achieve the Power Limit function.
Compatibility records
GoodWe GW5.1-BAT-D-G20 (ESA battery module, 5.12 kWh)Item number DLK-GOODWE-GW51BATDG20GoodWe GW5.1-BAT-D-G21 (ESA battery module, 5.12 kWh)Item number DLK-GOODWE-GW51BATDG21GoodWe GW6.0-BAT-D-G20 (ESA battery module, 6.0 kWh)Item number DLK-GOODWE-GW60BATDG20
GoodWe GW8.3-BAT-D-G20 (ESA battery module, 8.32 kWh)Item number DLK-GOODWE-GW83BATDG20GoodWe GW8.3-BAT-D-G21 (ESA battery module, 8.32 kWh)Item number DLK-GOODWE-GW83BATDG21GoodWe GW9.0-BAT-D-G20 (ESA battery module, 9.0 kWh)Item number DLK-GOODWE-GW90BATDG20The GoodWe ESA datasheet lists GW5.1-BAT-D-G20, GW8.3-BAT-D-G20, GW5.1-BAT-D-G21, GW8.3-BAT-D-G21, GW6.0-BAT-D-G20 and GW9.0-BAT-D-G20 modules and prints scalability of 12 pcs (p. 3). The user manual limits one column to six batteries. For capacity expansion, including installations that require a lower stack per column, it refers to a battery expansion kit (printed p. 79; PDF p. 80).