Fronius Primo GEN24 4.0 vs Solis S6-GR1P4K-S
AC power: Fronius Primo GEN24 4.0 4 kW, Solis S6-GR1P4K-S 4 kW. The Solis S6-GR1P4K-S is better on 4 of 11 comparable points.
Who wins where
- Fronius Primo GEN24 4.0
- Solis S6-GR1P4K-S
Biggest differences
| Fact | Primo GEN24 4.0 | S6-GR1P4K-S |
|---|---|---|
| MPPT voltage min. | 210 V | 90 V |
| Noise | 42 dB(A) | 20 dB(A) |
| Weight | 15.4 kg | 8.3 kg |
| Max. input current per MPPT | 22 A | 16 A |
| MPPT voltage max. | 530 V | 550 V |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | FroniusPrimo GEN24 4.0 | SolisS6-GR1P4K-S |
|---|---|---|
| Performance | ||
| AC power | 4 kW 1 | 4 kW 1 |
| Max. PV array power | 6 kWp 2 | 6 kWp 3 |
| MPP trackers | 2 2 | 2 3 |
| Efficiency | ||
| Max. efficiency | 97.6 % ✓ 2 | 97.3 % 3 |
| European efficiency | 97.1 % ✓ 2 | 96.6 % 3 |
| Noise | ||
| Noise | 42 dB(A) 2 | 20 dB(A) ✓ 3 |
| Electrical | ||
| MPPT voltage min. | 210 V 2 | 90 V ✓ 3 |
| MPPT voltage max. | 530 V 2 | 550 V ✓ 3 |
| Max. input current per MPPT | 22 A ✓ 2 | 16 A 3 |
| Phases | 1 1 | 1 1 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | No 1 | No 1 |
| Backup power | Yes 2 | – |
| Wi-Fi / monitoring | Yes 2 | – |
| Dimensions & weight | ||
| IP rating | IP66 2 | IP66 3 |
| Width | 474 mm 2 | 330 mm 3 |
| Height | 530 mm 2 | 371 mm 3 |
| Depth | 165 mm 2 | 161 mm 3 |
| Weight | 15.4 kg 2 | 8.3 kg ✓ 3 |
Sources
- ENA Type Test Register (inverters) — Energy Networks Association (ENA) · accessed 27 Sept 2026
- Fronius Primo GEN24 & GEN24 Plus 3.0 - 6.0 kW – datasheet, EN V04 (June 2025) — Fronius International GmbH · accessed 27 Sept 2026
- Solis Single Phase Grid-Tied Inverters S6-GR1P(2.5-6)K-S Datasheet, 1.0 — GINLONG TECHNOLOGIES CO.,LTD. · accessed 29 Sept 2026