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 Backup Switch 1P/3P-63A is a manual backup changeover switch for Fronius GEN24 Plus (Primo & Symo) and Verto Plus hybrid inverters, providing emergency power during a grid outage. On grid failure, it manually switches the home over to inverter/battery supply. The 1P/3P version is a 1- or 3-pole switch (phases only), rated 63A at 3~ 230/400V — 63A (AC21), 45A (AC23), 37A (AC3). DIN-rail mounted, rated IP20, −40 to +60 °C, 1–25 mm² phase/neutral conductors, certified IEC 60947-6-1. Installs quickly in the switchboard. 125.4 × 70 × 91 mm, 383 g.