Fronius Reserva Pro Module 3.98 kWh Battery

The Fronius Reserva Pro Module is a scalable high-voltage lithium iron phosphate (LFP) battery module designed for residential and commercial PV installations. With a usable capacity of 3.98 kWh per module, it can be stacked with other modules to build custom energy storage systems up to 32 kWh total.

The module operates at a nominal voltage of 70.84 V with an operating range of 55–80.3 V. It features IP65 protection, operates in ambient temperatures from –20 to +50 °C, and is compatible with Fronius Primo GEN24 Plus, Symo GEN24 Plus, and Verto Plus hybrid inverters. Communication is via ISO-SPI interface to the battery management system.

Weighing 36 kg with dimensions of 160 × 570 × 440 mm, this module is part of a modular European-manufactured system offering short supply chains and reliable availability. It carries a 10-year warranty at 80% state of health (SOH).