Fox ESS T25-G3 vs Fronius Symo 20.0-3-M
AC power: Fox ESS T25-G3 25 kW, Fronius Symo 20.0-3-M 20 kW. The Fox ESS T25-G3 is better on 6 of 9 comparable points.
Who wins where
- Fox ESS T25-G3
- Fronius Symo 20.0-3-M
Biggest differences
| Fact | T25-G3 | Symo 20.0-3-M |
|---|---|---|
| Weight | 21 kg | 43.4 kg |
| MPPT voltage min. | 140 V | 200 V |
| AC power | 25 kW | 20 kW |
| Max. PV array power | 37.5 kWp | 30 kWp |
| MPPT voltage max. | 1,000 V | 800 V |
| Max. input current per MPPT | 28 A | 33 A |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | Fox ESST25-G3 | FroniusSymo 20.0-3-M |
|---|---|---|
| Performance | ||
| AC power | 25 kW ✓ 1 | 20 kW 2 |
| Max. PV array power | 37.5 kWp ✓ 1 | 30 kWp 2 |
| MPP trackers | 2 1 | 2 2 |
| Efficiency | ||
| Max. efficiency | 98.6 % ✓ 1 | 98.1 % 2 |
| European efficiency | 97.8 % 1 | 97.9 % ✓ 2 |
| Electrical | ||
| MPPT voltage min. | 140 V ✓ 1 | 200 V 2 |
| MPPT voltage max. | 1,000 V ✓ 1 | 800 V 2 |
| Max. input current per MPPT | 28 A 1 | 33 A ✓ 2 |
| Phases | 3 1 | 3 2 |
| Connectivity & smart | ||
| Wi-Fi / monitoring | – | Yes 2 |
| Dimensions & weight | ||
| IP rating | IP65 1 | – |
| Width | 370 mm 1 | 510 mm 2 |
| Height | 480 mm 1 | 725 mm 2 |
| Depth | 183.5 mm 1 | 225 mm 2 |
| Weight | 21 kg ✓ 1 | 43.4 kg 2 |
Sources
- T SERIES(G3) THREE-PHASE INVERTER, V2.5 | 2026/07/03 — Fox ESS · accessed 29 Sept 2026
- FRONIUS SYMO, M,06,0092,EN v27 Dec 2022 — Fronius · accessed 2 Oct 2026