Fox ESS H3-Pro-20.0 vs KOSTAL PLENTICORE G3 20
AC power: Fox ESS H3-Pro-20.0 20 kW, KOSTAL PLENTICORE G3 20 20 kW. The KOSTAL PLENTICORE G3 20 is better on 4 of 11 comparable points.
Who wins where
- Fox ESS H3-Pro-20.0
- KOSTAL PLENTICORE G3 20
Biggest differences
| Fact | H3-Pro-20.0 | PLENTICORE G3 20 |
|---|---|---|
| Weight | 52.5 kg | 24.3 kg |
| MPPT voltage min. | 150 V | 227 V |
| Noise | 45 dB(A) | 39 dB(A) |
| MPPT voltage max. | 850 V | 800 V |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | Fox ESSH3-Pro-20.0 | KOSTALPLENTICORE G3 20 |
|---|---|---|
| Performance | ||
| AC power | 20 kW 1 | 20 kW 2 |
| Max. PV array power | – | 30 kWp 2 |
| MPP trackers | 3 3 | 3 2 |
| Efficiency | ||
| Max. efficiency | 97.2 % 3 | 98.21 % ✓ 2 |
| European efficiency | 96.3 % 3 | 97.72 % ✓ 2 |
| Noise | ||
| Noise | 45 dB(A) 3 | 39 dB(A) ✓ 2 |
| Electrical | ||
| MPPT voltage min. | 150 V ✓ 3 | 227 V 2 |
| MPPT voltage max. | 850 V ✓ 3 | 800 V 2 |
| Max. input current per MPPT | – | 30 A 2 |
| Phases | – | 3 2 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | Yes 3 | Yes 2 |
| Backup power | Yes 3 | Yes 2 |
| Wi-Fi / monitoring | Yes 3 | Yes 2 |
| Dimensions & weight | ||
| IP rating | IP65 3 | – |
| Width | 600 mm 3 | 409 mm 2 |
| Height | 560 mm 3 | 561 mm 2 |
| Depth | 225 mm 3 | 237 mm 2 |
| Weight | 52.5 kg 3 | 24.3 kg ✓ 2 |
| Warranty & lifespan | ||
| Warranty | – | 10 years 2 |
Sources
- CEC approved inverters (Australia) — Clean Energy Regulator (Australian Government), CC BY 4.0 · accessed 29 Sept 2026
- PLENTICORE Hybrid inverter - G3 4.0-20 kW, 09 / 2025 — KOSTAL Industrie Elektrik GmbH · accessed 29 Sept 2026
- H3 PRO THREE-PHASE HYBRID INVERTER, 2.6 — Fox ESS · accessed 29 Sept 2026