Batteries

Fronius Reserva Pro

£ 1,679.01GBP · price may vary

Model: FR-4.240.390
Specifications: 1

Full Pallet Quantity12 (2x 6)

Overview

The Fronius Reserva Pro is a scalable, high-performance storage solution for energy-intensive applications in commercial buildings, agricultural operations, and larger residential homes. Developed and manufactured in Europe, it combines safety, efficiency, and long-term reliability. Cell and module production in Europe Safe and durable LFP battery cells DC-coupled high-voltage system for maximum efficiency Modular scalability up to 32 kWh, 128 kWh in parallel operation of up to four towers Seamless integration with Fronius hybrid inverters and digital tools

Specifications

Full Pallet Quantity	12 (2x 6)

How to read this datasheet

Fronius Reserva Pro is listed with 1 published specification from Fronius, including full pallet quantity of 12 (2x 6). Those figures are what decide whether this unit fits your system, so read them against the equipment it will connect to before comparing price.

For a battery, the figures that matter most are cycle life at a stated depth of discharge, commonly 3,000–6,000 cycles for LiFePO4, round-trip efficiency, around 90–95% for lithium and 75–85% for lead-acid, communication protocol (CAN or RS485) for talking to the inverter and nominal capacity in ampere-hours (Ah) or kilowatt-hours (kWh). Storage is what turns a solar array from a daytime bill-reducer into a system that covers evening loads and rides through outages. It is normally the single most expensive component, so sizing it correctly matters more than with any other part.

What to check before ordering

The checks below apply to any battery. Run them against the specification table above — most disappointing solar purchases are compatible-on-paper units that fail one of these in practice.

Size from your evening consumption. Add up what actually runs after sunset for the hours you want covered, then divide by the usable capacity per unit — that number, not the array size, sets how many batteries you need.
Check the continuous discharge rating against your inverter. A battery that stores plenty of energy but can only deliver 50 A cannot support a large inverter at full output.
Match voltage to the inverter, and confirm the battery appears on the inverter maker's supported list. Closed-loop communication lets the inverter respect the battery's real charge limits instead of guessing.
Read the warranty in full: lithium warranties are stated as a term plus either a cycle count or a total energy throughput, and whichever limit arrives first ends the cover.

Common mistakes

Mixing old and new batteries, or different chemistries, in one bank. The weakest unit drags the whole bank down and can be damaged by the others.
Sizing the bank for total daily consumption rather than after-dark consumption, which typically doubles the cost for no benefit.
Installing lithium packs in an unventilated, hot enclosure. Sustained high temperature is the fastest way to lose cycle life.

Price and availability in United Kingdom

Fronius Reserva Pro is listed at £ 1,679 (GBP) for United Kingdom. Solar pricing moves with supply, import duties and exchange rates, and distributors set their own margins, so treat this as a comparison reference and confirm the current figure before you order.

SolarBazaar compares equipment rather than selling it. Shortlist here on specification and price, then buy from an authorised distributor or installer in United Kingdom: warranty cover on solar hardware is normally honoured through the channel you bought from, so confirm who supports Fronius locally before ordering.

Fronius Reserva Pro — frequently asked questions

How much does Fronius Reserva Pro cost?

Fronius Reserva Pro is listed at £ 1,679 (GBP) for United Kingdom. The figure is indicative — solar prices move with supply, duties and exchange rates, and each distributor sets its own margin — so confirm the current price with a supplier before ordering.

What are the specifications of Fronius Reserva Pro?

We hold 1 published specification for this battery, including full pallet quantity 12 (2x 6). The full table is on this page, listed under model FR-4.240.390.

Who makes Fronius Reserva Pro?

Fronius Reserva Pro is a Fronius product, listed under batteries with model reference FR-4.240.390. The Fronius brand page lists the rest of its range so you can compare across the catalogue.

Is Fronius Reserva Pro right for my system?

That depends on what it has to connect to. For a battery, check nominal capacity in ampere-hours (Ah) or kilowatt-hours (kWh), usable capacity after depth of discharge — LiFePO4 typically allows 80–100%, lead-acid closer to 50% and system voltage: 12 V, 24 V and 48 V for low-voltage packs, or a high-voltage stack against the rest of your equipment before price enters the decision. Compare usable kilowatt-hours, not nameplate capacity. A 100 Ah lead-acid battery at 12 V is nominally 1.2 kWh but only about 0.6 kWh is safely usable, while a 100 Ah LiFePO4 pack gives you roughly 1.0–1.2 kWh.

Where can I buy Fronius Reserva Pro in United Kingdom?

SolarBazaar lists and compares equipment rather than selling it. Use the specifications and price here to shortlist, then buy through an authorised distributor or installer in United Kingdom — buying in-channel is what keeps the manufacturer's warranty valid.

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