The Fronius Reserva is a premium high‑voltage battery system designed to seamlessly integrate with Fronius GEN24 Plus and Verto Plus hybrid inverters. Built using lithium‑iron phosphate (LFP) cells, it features DC coupling for near-lossless charging and discharging, maximizing overall system efficiency and safety.

Available in modular towers from 6.3 kWh to 15.8 kWh (via stacking two to five 3.15 kWh modules), the Reserva can be scaled up to 63 kWh by paralleling four towers. It's backup‑power and black‑start capable, meaning it can continue to charge and discharge even during a grid outage—keeping you energy‑independent and reliable.