Fronius Symo GEN24 4.0 Plus vs SMA Sunny Boy Smart Energy 4.0
AC power: Fronius Symo GEN24 4.0 Plus 4 kW, SMA Sunny Boy Smart Energy 4.0 4 kW. The SMA Sunny Boy Smart Energy 4.0 is better on 5 of 13 comparable points.
Who wins where
- Fronius Symo GEN24 4.0 Plus
- SMA Sunny Boy Smart Energy 4.0
Biggest differences
| Fact | Symo GEN24 4.0 Plus | Sunny Boy Smart Energy 4.0 |
|---|---|---|
| MPPT voltage min. | 170 V | 60 V |
| MPPT voltage max. | 800 V | 480 V |
| MPP trackers | 2 | 3 |
| Max. PV array power | 6 kWp | 8 kWp |
| Max. input current per MPPT | 12.5 A | 15 A |
| Weight | 15.6 kg | 17.5 kg |
Score per area = position (0–100) relative to all 238 models in this category; higher is better.
| Technical specifications | FroniusSymo GEN24 4.0 Plus | SMASunny Boy Smart Energy 4.0 |
|---|---|---|
| Performance | ||
| AC power | 4 kW 1 | 4 kW 2 |
| Max. PV array power | 6 kWp 1 | 8 kWp ✓ 2 |
| MPP trackers | 2 1 | 3 ✓ 2 |
| Efficiency | ||
| Max. efficiency | 98.2 % ✓ 1 | 97.8 % 2 |
| European efficiency | 97.2 % ✓ 1 | 96.8 % 2 |
| Noise | ||
| Noise | 36 dB(A) 1 | 35 dB(A) ✓ 2 |
| Electrical | ||
| MPPT voltage min. | 170 V 1 | 60 V ✓ 2 |
| MPPT voltage max. | 800 V ✓ 1 | 480 V 2 |
| Max. input current per MPPT | 12.5 A 1 | 15 A ✓ 2 |
| Phases | 3 1 | 1 2 |
| Connectivity & smart | ||
| Hybrid (battery-ready) | Yes 1 | Yes 2 |
| Backup power | Yes 1 | Yes 2 |
| Wi-Fi / monitoring | Yes 1 | Yes 2 |
| Dimensions & weight | ||
| IP rating | IP66 1 | IP65 2 |
| Width | 474 mm 1 | 500 mm 2 |
| Height | 530 mm 1 | 586 mm 2 |
| Depth | 165 mm 1 | 236 mm 2 |
| Weight | 15.6 kg ✓ 1 | 17.5 kg 2 |
| Warranty & lifespan | ||
| Warranty | – | 5 years 2 |
Sources
- Fronius Symo GEN24 & GEN24 Plus 3.0 - 10.0 kW – datasheet, EN V05 (May 2025) — Fronius International GmbH · accessed 27 Sept 2026
- Sunny Boy Smart Energy 3.6 / 4.0 / 5.0 / 6.0 – datasheet, SBSE36-60-DS-en-18 (status 04/2026) — SMA Solar Technology AG · accessed 27 Sept 2026