SMASunny Boy 4.0
The SMA Sunny Boy 4.0 is a solar inverter with AC power 4 kW, MPP trackers 2 and european efficiency 96.5 %.1
Key figures
Technical specifications
| Performance | |
|---|---|
| AC power | 4 kW1 |
| Max. PV array power | 7.5 kWp1 |
| MPP trackers | 21 |
| Strings per MPPT | 21 |
| Efficiency | |
| Max. efficiency | 97 %1 |
| European efficiency | 96.5 %1 |
| Noise | |
| Noise | 25 dB(A)1 |
| Electrical | |
| MPPT voltage min. | 140 V1 |
| MPPT voltage max. | 500 V1 |
| Max. input current per MPPT | 15 A1 |
| Phases | 11 |
| Connectivity & smart | |
| Wi-Fi / monitoring | Yes1 |
| Dimensions & weight | |
| IP rating | IP651 |
| Width | 435 mm1 |
| Height | 470 mm1 |
| Depth | 176 mm1 |
| Weight | 17.5 kg1 |
| Warranty & lifespan | |
| Warranty | 5 years1 |
Manufacturer documentation
- Product page
- Datasheet / specifications — Sunny Boy 3.0 / 3.6 / 4.0 / 5.0 / 6.0 – datasheet – SB30-60-DS-en-61 (status 10/2023)
External links to SMA's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.
Compare with
Frequently asked questions
What is the AC power of the SMA Sunny Boy 4.0?
The AC power of the SMA Sunny Boy 4.0 is 4 kW.1
What is the MPP trackers of the SMA Sunny Boy 4.0?
The MPP trackers of the SMA Sunny Boy 4.0 is 2.1
What is the european efficiency of the SMA Sunny Boy 4.0?
The european efficiency of the SMA Sunny Boy 4.0 is 96.5 %.1
What is the max. PV array power of the SMA Sunny Boy 4.0?
The max. PV array power of the SMA Sunny Boy 4.0 is 7.5 kWp.1
Sources
- Sunny Boy 3.0 / 3.6 / 4.0 / 5.0 / 6.0 – datasheet, SB30-60-DS-en-61 (status 10/2023) — SMA Solar Technology AG · accessed 27 Sept 2026