Higher inverter efficiency directly reduces internal thermal stress and power conversion waste. The GW8K-ET achieves 98.20% maximum efficiency (97.50% European efficiency), ensuring maximum solar generation reaches your home circuits and battery bank.

• Wide MPPT voltage window (200–850 V) maintains peak efficiency across high summer and cold winter string voltages.
• Dual independent 12.5 A channels (15.2 A Isc) optimize multi-pitch residential stringing without mismatch losses.
• Direct high-voltage battery coupling (180–600 V) transfers up to 25 A directly into storage with minimal conversion steps.

Phase

3

AC power

8 kW

Product role

PV inverter for battery-ready residential or commercial project review

Max. Input Power (W)

12 kW

Max PV input

12 kW

Battery voltage range

180-600V

Max efficiency

98.20%

IP rating

IP66

Packaging (VPE)

6 per pallet

Ingress protection

IP66

Operating temperature

-35 to +60 °C

Dimensions

415 × 516 × 180 mm

Weight

24 kg

To allow simultaneous backup pass-through and off-peak battery charging. While nominal output current during standard on-grid export is approx. 12.1 A per phase (8,000 W @ 400 V), the maximum AC current rating from the grid reaches 22.7 A. This allows the inverter to pass through utility power to the dedicated backup sub-panel while simultaneously drawing grid power to fast-charge the battery during scheduled off-peak tariff periods (e.g., overnight dynamic tariffs).

Not at full 11 kW speed; throttle charger to 6–7 kW. The inverter's dedicated emergency backup port is rated for 8,000 VA continuous power (approx. 11.6 A per phase). An unthrottled 11 kW three-phase EV charger draws 16 A per phase and will overload the backup port if operated at full speed off-grid. For off-grid vehicle charging, configure your smart EV charger (such as GoodWe HCA) to throttle charging power down to 6 kW or 7 kW, leaving remaining capacity for essential home circuits.

600 V to 650 V Vmp under standard operating temperatures. The inverter achieves its highest electrical conversion efficiency when the PV string operating voltage ($V_{\text{mp}}$) sits in the 600 V to 650 V range under standard operating temperatures. For typical 400W–440W solar modules ($V_{\text{mp}} \approx 32\text{. }34\text{ V}$), designing strings with 16 to 19 panels in series places the system right in the center of its peak efficiency curve.

Yes. A GoodWe GM3000 or Chint DTSU666 is required. To dynamically direct surplus rooftop solar power into the battery and prevent unauthorized grid export, the inverter requires real-time grid exchange data from an external smart meter (such as GoodWe GM3000 or Chint DTSU666) connected via a twisted-pair RS485 communication cable.