The Fronius Primo 3.8-1 is a single-phase residential solar inverter manufactured by Austrian PV manufacturer Fronius, it is the 3.8kW power category variant of the Fronius Primo inverter series, the flagship Fronius inverter series for home solar systems.

This solar inverter has a maximum power output of 3.8kW and a maximum efficiency of 96.7%. That means that 96.7% of the power generated by your solar panels is usable in your home.

This inverter model has a recommended input power range of 3.0-6.0kW and a maximum input power of 6kW, or 15 solar panels if each solar panel has a power output of 400W. The Fronius Primo 3.8-1 can operate on 208V and 240V, providing a maximum continuous output current of 18.3 A (208 V) or 15.8 A (240V).

The inverter has a height of 627mm (24.6”) a width of 430mm (16.9”) and a depth of 205mm (8”). The inverter model weighs 21.45kg or 47.28 lb.

The inverter features Rapid DC Shutdown technology, keeping your system safe in an emergency. This model is not supportive of EV charging, or home battery compatible. The inverter is capable of operating at temperatures ranging from -40 - 131°F (-40 - 55°C), helped by a variable speed fan cooling system, and can safely operate at an altitude of 13,123 ft (4000m). The Primo 3.8-1 has an operating noise of < 65 dB, and a nighttime energy consumption of < 1 W.

Owners can interface with this Primo 3.8-1 via Wifi, USB, and ethernet, with system data accessible via the Solar.Web platform.

Fronius provides a 10-year manufacturer's warranty with the option to extend up to 15 or 20 years.