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Fronius Reserva

Store solar energy and reduce costs

Unlock the full potential of your PV system: With the Fronius Reserva, the solar energy you generate is stored for when you need it most — in the evening or on cloudy days. This means less reliance on the grid, lower energy costs, and greater energy independence.

Fronius Reserva – your solution for efficient energy storage 

The Fronius Reserva is a DC-coupled high-voltage battery that stores excess solar energy with outstanding efficiency. Available in capacities from 6.3 to 15.8 kWh (two to five modules), it scales to match your individual energy needs. It integrates seamlessly into your existing Fronius system and pairs perfectly with your Fronius hybrid inverter. Thanks to DC coupling, energy conversion losses are minimized — for maximum efficiency and higher self-consumption. This helps you cut energy costs significantly and boosts your independence from the grid. 

Built with durable, safe lithium iron phosphate cells and designed for flexible expansion, the Fronius Reserva is your reliable and future-ready energy storage solution.

Your advantages with the Fronius Reserva

Everything from a single source

All Fronius devices work together perfectly. With the Solar.web app, you can keep an eye on everything without additional tools from third-party providers. One contact person is all you need for the best service and support.

Maximum efficiency, maximum independence

The Reserva's DC coupling ensures virtually loss-free storage. High-voltage technology and lithium iron phosphate cells offer high efficiency and a long service life.

European data security

Your data is secure – it is stored on European servers and protected by the highest security standards.

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Buy the Fronius Reserva now and get 3 months of Solar.web Premium for free

Solar.web is Fronius' online monitoring portal, which allows you to conveniently monitor and analyze your PV system—anytime, anywhere. The Premium version offers advanced features such as customized reports, profitability analyses and weather forecasts. This allows you to keep an even closer eye on your energy flows and optimize your self-consumption in a targeted manner.

The video below shows you step by step how to redeem the voucher code and enjoy the benefits of Solar.web Premium with your Reserva.

Fronius Reserva

Discover the highlights of the smart high-voltage battery

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