Fronius Verto 33.3 Plus Hybrid Inverter

The Fronius Verto 33.3 Plus is a three-phase hybrid inverter with a rated AC output of 33.3 kW and integrated Full Backup capability. It features three independent MPPT trackers with six DC inputs and a wide DC voltage range (150–1,000 V), enabling flexible system design and optimal performance even in partially shaded conditions, thanks to integrated Dynamic Peak Manager technology.

Equipped with comprehensive safety features, including an Arc Fault Circuit Interrupter (Arc Guard), integrated DC surge protection (Type 1+2), and DC insulation monitoring, the inverter achieves a maximum efficiency of 98.15% and a European efficiency (ηEU) of 97.95%. When combined with an external battery storage system and grid switchover components, it provides a fully-fledged three-phase backup power supply with a peak output of 50 kVA.

The inverter offers open connectivity via the integrated Fronius Solar.web portal, Modbus TCP SunSpec, Ethernet LAN (RJ45), and WLAN (802.11b/g), enabling seamless integration with energy management systems, EV chargers (Fronius Wattpilot Flex), and load controllers (Fronius Ohmpilot). Rated for indoor and outdoor installation, with IP66 protection and regulated air cooling, it operates at ambient temperatures from −25 °C to +60 °C.