Fox ESS T20-G3 vs GoodWe GW15K-ET-20
AC power: Fox ESS T20-G3 20 kW, GoodWe GW15K-ET-20 15 kW. The Fox ESS T20-G3 is better on 7 of 9 comparable points.
Who wins where
- Fox ESS T20-G3
- GoodWe GW15K-ET-20
Biggest differences
| Fact | T20-G3 | GW15K-ET-20 |
|---|---|---|
| Max. input current per MPPT | 28 A | 16 A |
| MPP trackers | 2 | 3 |
| AC power | 20 kW | 15 kW |
| Max. PV array power | 30 kWp | 24 kWp |
| Weight | 20 kg | 25 kg |
| MPPT voltage max. | 1,000 V | 850 V |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | Fox ESST20-G3 | GoodWeGW15K-ET-20 |
|---|---|---|
| Performance | ||
| AC power | 20 kW ✓ 1 | 15 kW 2 |
| Max. PV array power | 30 kWp ✓ 1 | 24 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 | 28 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 | 20 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