Fronius is a well-established Austrian technology company known for its innovation and high-quality products. It operates in three core business sectors: Solar Energy, where they are a leading manufacturer of residential and commercial solar inverters; Perfect Welding, a division that develops advanced welding systems and solutions; and Perfect Charging, which specializes in intelligent battery charging technology for industrial and automotive applications. The company is committed to sustainable solutions and has a strong global presence, with its brand being synonymous with reliability and technological advancement in each of its markets.

The Fronius Verto is a three-phase string inverter for small commercial, agricultural and apartment-building PV, available as Verto 15.0, 20.0, 25.0 400, 30.0 and 33.3 — rated from 15 kW to 33.3 kW, for new systems and expansions alike. Depending on model it carries 3 or 4 high-current MPP trackers (28 A usable per MPPT) with a wide 150–870 V MPP range, 1000 V max input and up to 150% DC oversizing, so complex or multi-orientation roofs are easily handled; the integrated Dynamic Peak Manager recovers yield in partial shade. Grid output runs from 15 kW / 15 kVA up to 33.3 kW / 33.3 kVA at 3~ (N)PE 380–480 V, THDi <3%, power factor 0–1 ind./cap. Maximum efficiency reaches 98.56% (EU up to 98.35%) with >99.9% MPP adaptation efficiency. Safety is complete in the base configuration — integrated DC and AC surge protection, Arc Fault Circuit Interrupter (Fronius Arc Guard), DC insulation measurement, DC disconnector, RCMU and reverse-polarity protection — with no add-on components to buy (the 30.0 and 33.3 models are supplied in an SPD Type 1+2 DC and AC configuration). Rated IP66 with Active Cooling Technology for indoor or outdoor install (−40 °C to +60 °C, up to 4000 m), night-time draw <16 W. Open interfaces (2× RS485 Modbus RTU SunSpec, Modbus TCP, WLAN, 2× LAN, WSD, 6 digital I/O) integrate the Fronius Smart Meter, ripple-control receivers and consumption regulators such as Fronius Ohmpilot and Wattpilot Flex; monitoring via Solar.web, with data stored in Europe. Made in Austria. Certified to IEC 62109-1/-2, EN 50549-1/-2, VDE-AR-N 4105 & 4110 and G99.