SMA Sunny Boy SB3.8-1SP-US-41 3.8kW 208/240VAC String Inverter
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The SMA Sunny Boy SB3.8-1SP-US-41 is a 3.8kW single-phase residential string inverter — the reference transformerless platform with SMA reliability and ShadeFix optimization.
Key Features
- 3.8kW single-phase output, 208/240VAC
- Transformerless design with up to 3 MPPTs (model dependent) for multi-face roofs
- Secure Power Supply (SPS) outlet — daytime power during outages without batteries
- Integrated DC disconnect and arc-fault protection
- SMA ShadeFix shade management
- Sunny Portal / Sunny Places monitoring via Speedwire
- SunSpec rapid-shutdown certified for NEC 690.12 compliance
Specifications
| Model | SB3.8-1SP-US-41 |
| Rated Output | 3.8kW |
| Grid | 208/240VAC single-phase |
| Safety | AFCI, integrated DC disconnect, SunSpec RSD certified |
| Monitoring | Sunny Portal via Speedwire |
| Warranty | 10-year SMA warranty (extendable) |
Authorized SMA distribution — full manufacturer warranty (10-year standard US inverter warranty, extendable). Ships via ground; PEAK3/CORE1 commercial inverters ship LTL freight.
| SKU | USS-SMAA-SMASUNBOY |
|---|---|
| Manufacturer | SMA |
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