Fronius Symo 17.5-3-M vs KOSTAL PLENTICORE G3 17.5
AC power: Fronius Symo 17.5-3-M 17.5 kW, KOSTAL PLENTICORE G3 17.5 17.5 kW. The KOSTAL PLENTICORE G3 17.5 is better on 5 of 10 comparable points.
Who wins where
- Fronius Symo 17.5-3-M
- KOSTAL PLENTICORE G3 17.5
Biggest differences
| Fact | Symo 17.5-3-M | PLENTICORE G3 17.5 |
|---|---|---|
| Weight | 43.4 kg | 24.3 kg |
| MPP trackers | 2 | 3 |
| Max. input current per MPPT | 33 A | 30 A |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | FroniusSymo 17.5-3-M | KOSTALPLENTICORE G3 17.5 |
|---|---|---|
| Performance | ||
| AC power | 17.5 kW 1 | 17.5 kW 2 |
| Max. PV array power | 26.3 kWp 1 | 26.5 kWp ✓ 2 |
| MPP trackers | 2 1 | 3 ✓ 2 |
| Efficiency | ||
| Max. efficiency | 98.1 % 1 | 98.21 % ✓ 2 |
| European efficiency | 97.8 % ✓ 1 | 97.72 % 2 |
| Noise | ||
| Noise | – | 39 dB(A) 2 |
| Electrical | ||
| MPPT voltage min. | 200 V 1 | 198 V ✓ 2 |
| MPPT voltage max. | 800 V 1 | 800 V 2 |
| Max. input current per MPPT | 33 A ✓ 1 | 30 A 2 |
| Phases | 3 1 | 3 2 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | – | Yes 2 |
| Backup power | – | Yes 2 |
| Wi-Fi / monitoring | Yes 1 | Yes 2 |
| Dimensions & weight | ||
| Width | 510 mm 1 | 409 mm 2 |
| Height | 725 mm 1 | 561 mm 2 |
| Depth | 225 mm 1 | 237 mm 2 |
| Weight | 43.4 kg 1 | 24.3 kg ✓ 2 |
| Warranty & lifespan | ||
| Warranty | – | 10 years 2 |
Sources
- FRONIUS SYMO, M,06,0092,EN v27 Dec 2022 — Fronius · accessed 2 Oct 2026
- PLENTICORE Hybrid inverter - G3 4.0-20 kW, 09 / 2025 — KOSTAL Industrie Elektrik GmbH · accessed 29 Sept 2026