Fox ESS KH9.9 vs Fronius Symo GEN24 10.0
AC power: Fox ESS KH9.9 9.9 kW, Fronius Symo GEN24 10.0 10 kW. The Fronius Symo GEN24 10.0 is better on 5 of 11 comparable points.
Who wins where
- Fox ESS KH9.9
- Fronius Symo GEN24 10.0
Biggest differences
| Fact | KH9.9 | Symo GEN24 10.0 |
|---|---|---|
| MPPT voltage min. | 80 V | 278 V |
| MPP trackers | 4 | 2 |
| MPPT voltage max. | 500 V | 800 V |
| Noise | 30 dB(A) | 47 dB(A) |
| Weight | 29 kg | 23.4 kg |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | Fox ESSKH9.9 | FroniusSymo GEN24 10.0 |
|---|---|---|
| Performance | ||
| AC power | 9.9 kW 1 | 10 kW ✓ 2 |
| Max. PV array power | – | 15 kWp 3 |
| MPP trackers | 4 ✓ 4 | 2 3 |
| Efficiency | ||
| Max. efficiency | 97.8 % 4 | 98.2 % ✓ 3 |
| European efficiency | 97.4 % 4 | 97.9 % ✓ 3 |
| Noise | ||
| Noise | 30 dB(A) ✓ 4 | 47 dB(A) 3 |
| Electrical | ||
| MPPT voltage min. | 80 V ✓ 4 | 278 V 3 |
| MPPT voltage max. | 500 V 4 | 800 V ✓ 3 |
| Max. input current per MPPT | – | 25 A 3 |
| Phases | – | 3 2 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | Yes ✓ 4 | No 2 |
| Backup power | Yes 4 | Yes 3 |
| Wi-Fi / monitoring | Yes 4 | Yes 3 |
| Dimensions & weight | ||
| IP rating | IP65 4 | IP66 3 |
| Width | 450 mm 4 | 529 mm 3 |
| Height | 527 mm 4 | 595 mm 3 |
| Depth | 208 mm 4 | 180 mm 3 |
| Weight | 29 kg 4 | 23.4 kg ✓ 3 |
Sources
- CEC approved inverters (Australia) — Clean Energy Regulator (Australian Government), CC BY 4.0 · accessed 29 Sept 2026
- ENA Type Test Register (inverters) — Energy Networks Association (ENA) · accessed 27 Sept 2026
- Fronius Symo GEN24 & GEN24 Plus 3.0 - 10.0 kW – datasheet, EN V05 (May 2025) — Fronius International GmbH · accessed 27 Sept 2026
- KH/KA SINGLE-PHASE HYBRID/AC INVERTER, 1.6 | 2025/10/09 — Fox ESS · accessed 29 Sept 2026