Fronius Reserva PRO 24 kWh Battery Pack

Fronius Reserva PRO 24 kWh battery: complete, ready-to-install system

The Fronius Reserve PRO is Fronius’s new-generation storage range: a lithium battery from high voltage with DC coupling which works directly with the inverter, without double conversion, to store solar energy with minimal losses.

Compared with the Standard Reserve, the PRO uses higher-capacity modules — 3.98 kWh compared with 3.15 kWh, which allows for greater storage capacity with the same number of modules and takes up less space per kWh.

This pack includes everything needed to get the system up and running: You don’t have to order the parts separately or check that the quantities add up.

What’s included in the pack

• 6 × Fronius Reserva PRO 3.98 kWh battery module
• 1 × Fronius Reserva PRO BMS Unit and Base
• Total capacity: 23.88 kWh

The unit BMS and Base It is essential in any Reserva PRO configuration: it manages cell balancing, system safety and communication with the inverter. Without it, the modules will not work, and it is the component most often overlooked when buying parts separately.

Who is this feature for?

The 23.88 kWh system is designed for commercial premises and high-consumption homes seeking extended autonomy and backup power for significant loads during power cuts.

Compatibility with Fronius inverters

The PRO Reserve is designed for investors Fronius GEN24 Plus, both single-phase (Primo) and three-phase (Symo). The suffix Plus This indicates that the inverter features a battery input: a GEN24 without ‘Plus’ is mains-only and does not support battery storage.

• Fronius Primo GEN24 SC Plus — single-phase, high-current generation
• Fronius Primo GEN24 Plus — single-phase
• Fronius Symo GEN24 SC Plus — three-phase, high-current generation
• Fronius Symo GEN24 Plus — three-phase

If you’re not sure which inverter you have or are planning to install, please contact us before placing your order and we’ll check this with you.

Available configurations

The PRO Reserve is modular, and you can expand it at a later date whilst retaining the BMS and the base:

• Reserve PRO 8 — 2 modules — 7.96 kWh
• PRO 12 Reserve — 3 modules — 11.94 kWh
• PRO 16 Reserve — 4 modules — 15.92 kWh

Backup in the event of power cuts

When used in conjunction with a GEN24 Plus inverter and the corresponding backup accessory, the Reserva PRO keeps your home running during a power cut:

• PV Point — basic power supply via a separate mains socket
• Backup Switch — full backing of the property

Without one of these two accessories, the system stores energy but does not operate in stand-alone mode.

Monitoring

The entire system — solar generation, battery charging and discharging, and household consumption — is monitored from Fronius Solar.web, both via the browser and the mobile app.

Purchased from an official Fronius System Partner

FVComponentes is Fronius System Partner and Official Service Partner in Spain, the highest tier in the Fronius partner network. For you, this means:

• Official warranty processed directly, with no intermediaries
• Direct access to Fronius technical support in the event of any issues
• Preliminary advice on sizing and compatibility
• Genuine product with traceability back to the manufacturer

Frequently asked questions

What is the difference between Fronius Reserva and Reserva PRO?
The main difference is the capacity of each module: the PRO uses 3.98 kWh modules compared with the 3.15 kWh of the Standard booking. With the same number of modules, you get more storage capacity and take up less space per kWh. If you’re unsure which one is best suited to your installation, please get in touch.

Which inverters are compatible with the Fronius Reserva PRO battery?
Fronius GEN24 inverters Plus, both single-phase (Primo) and three-phase (Symo), including the SC versions. The «Plus» suffix indicates that the inverter has a battery input.

Can I upgrade the battery at a later date?
Yes. The system is modular: you can add modules whilst retaining the BMS and the base unit of this pack. Please get in touch and we’ll work with you to plan the expansion.

Does it work during a power cut?
Yes, provided the installation is fitted with the backup accessory: PV Point for a single socket, or Backup Switch for full home backup. The battery itself stores energy, but off-grid operation is enabled by the accessory.