GoodWe GW25K-ET vs KOSTAL PLENTICORE G3 20
AC power: GoodWe GW25K-ET 25 kW, KOSTAL PLENTICORE G3 20 20 kW. Both models win equally often (4 of 13 points).
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Both models in detail
Who wins where
- GoodWe GW25K-ET
- KOSTAL PLENTICORE G3 20
Biggest differences
| Fact | GW25K-ET | PLENTICORE G3 20 |
|---|---|---|
| Weight | 54 kg | 24.3 kg |
| AC power | 25 kW | 20 kW |
| Max. PV array power | 37.5 kWp | 30 kWp |
| Noise | 45 dB(A) | 39 dB(A) |
| MPPT voltage min. | 200 V | 227 V |
| MPPT voltage max. | 850 V | 800 V |
Score per area = position (0–100) relative to all 263 models in this category; higher is better.
| Technical specifications | GoodWeGW25K-ET | KOSTALPLENTICORE G3 20 |
|---|---|---|
| Performance | ||
| AC power | 25 kW✓1 | 20 kW2 |
| Max. PV array power | 37.5 kWp✓1 | 30 kWp2 |
| MPP trackers | 31 | 32 |
| Efficiency | ||
| Max. efficiency | 98 %1 | 98.21 %✓2 |
| European efficiency | 97.5 %1 | 97.72 %✓2 |
| Noise | ||
| Noise | 45 dB(A)1 | 39 dB(A)✓2 |
| Electrical | ||
| MPPT voltage min. | 200 V✓1 | 227 V2 |
| MPPT voltage max. | 850 V✓1 | 800 V2 |
| Max. input current per MPPT | 30 A1 | 30 A2 |
| Phases | – | 32 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | Yes1 | Yes2 |
| Backup power | Yes1 | Yes2 |
| Wi-Fi / monitoring | Yes1 | Yes2 |
| Dimensions & weight | ||
| IP rating | IP661 | – |
| Width | 520 mm1 | 409 mm2 |
| Height | 660 mm1 | 561 mm2 |
| Depth | 220 mm1 | 237 mm2 |
| Weight | 54 kg1 | 24.3 kg✓2 |
| Warranty & lifespan | ||
| Warranty | – | 10 years2 |
Frequently asked questions
Which is better: the GoodWe GW25K-ET or the KOSTAL PLENTICORE G3 20?
AC power: GoodWe GW25K-ET 25 kW, KOSTAL PLENTICORE G3 20 20 kW. Both models win equally often (4 of 13 points).
What is the AC power of the GoodWe GW25K-ET and the KOSTAL PLENTICORE G3 20?
GoodWe GW25K-ET: 25 kW. KOSTAL PLENTICORE G3 20: 20 kW.
Which is better on weight: the GoodWe GW25K-ET or the KOSTAL PLENTICORE G3 20?
KOSTAL PLENTICORE G3 20: 24.3 kg. GoodWe GW25K-ET: 54 kg.
Which is better on max. PV array power: the GoodWe GW25K-ET or the KOSTAL PLENTICORE G3 20?
GoodWe GW25K-ET: 37.5 kWp. KOSTAL PLENTICORE G3 20: 30 kWp.
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How we collect and check this data →
Sources
- GoodWe ET Series 15-30kW Datasheet, 20241203-EN-V2.1 — GoodWe · accessed 14 Nov 2026
- PLENTICORE Hybrid inverter - G3 4.0-20 kW, 09 / 2025 — KOSTAL Industrie Elektrik GmbH · accessed 29 Sept 2026