Fox ESS T12-G3 vs GoodWe GW12K-ET-20
AC power: Fox ESS T12-G3 12 kW, GoodWe GW12K-ET-20 12 kW. Both models win equally often (4 of 9 points).
Who wins where
- Fox ESS T12-G3
- GoodWe GW12K-ET-20
Biggest differences
| Fact | T12-G3 | GW12K-ET-20 |
|---|---|---|
| MPP trackers | 2 | 3 |
| Weight | 17 kg | 25 kg |
| MPPT voltage max. | 1,000 V | 850 V |
| MPPT voltage min. | 140 V | 120 V |
| Max. input current per MPPT | 14 A | 16 A |
| Max. PV array power | 18 kWp | 19.2 kWp |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | Fox ESST12-G3 | GoodWeGW12K-ET-20 |
|---|---|---|
| Performance | ||
| AC power | 12 kW 1 | 12 kW 2 |
| Max. PV array power | 18 kWp 1 | 19.2 kWp ✓ 2 |
| MPP trackers | 2 1 | 3 ✓ 2 |
| Efficiency | ||
| Max. efficiency | 98.6 % ✓ 1 | 98.2 % 2 |
| European efficiency | 97.8 % ✓ 1 | 97.5 % 2 |
| Electrical | ||
| MPPT voltage min. | 140 V 1 | 120 V ✓ 2 |
| MPPT voltage max. | 1,000 V ✓ 1 | 850 V 2 |
| Max. input current per MPPT | 14 A 1 | 16 A ✓ 2 |
| Phases | 3 1 | 3 2 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | – | Yes 2 |
| Backup power | – | Yes 2 |
| Wi-Fi / monitoring | – | Yes 2 |
| Dimensions & weight | ||
| IP rating | IP65 1 | IP66 2 |
| Width | 370 mm 1 | 496 mm 2 |
| Height | 480 mm 1 | 460 mm 2 |
| Depth | 183.5 mm 1 | 221 mm 2 |
| Weight | 17 kg ✓ 1 | 25 kg 2 |
Sources
- T SERIES(G3) THREE-PHASE INVERTER, V2.5 | 2026/07/03 — Fox ESS · accessed 29 Sept 2026
- ET G2 Series 6–15 kW hybrid inverter (EMEA) – datasheet, EN-EMEA V1.1 (20241022) — GoodWe Technologies Co., Ltd. · accessed 27 Sept 2026