If you've already got solar panels on your roof, you know the story—plenty of energy while the sun's up, but once it dips below the horizon, you're drawing power from the grid again. That’s where home batteries come into play. The Fronius Reserva is one of the latest entrants in this space, designed to help you get more out of the solar energy you produce.
A Flexible Way to Store Solar Energy
The Reserva is a high-voltage, DC-coupled battery designed to store excess solar energy for use later—at night, during overcast days, or when the grid goes down (depending on your system configuration). Because it connects on the DC side of your solar system, energy transfer is more efficient than AC-coupled systems, meaning you lose less power during the charging process.
It’s also modular, which makes it suitable for a range of household energy needs. Here’s a breakdown of the available sizes:
Source: fronius.com/en-au
- Reserva 6.3 – 6.31 kWh (2 modules)
- Reserva 9.5 – 9.47 kWh (3 modules)
- Reserva 12.6 – 12.63 kWh (4 modules)
- Reserva 15.8 – 15.79 kWh (5 modules)
Need more storage? Up to four towers can be connected in parallel, providing a combined capacity of up to 63 kWh—enough to power larger homes or even small commercial setups.
Backed by a New Government Rebate
With a new federal rebate now in effect, households could see around 30% shaved off the cost of a new battery. That makes options like the Fronius Reserva far more financially accessible, especially when paired with an existing or planned solar setup.
Read more about the new Cheaper Home Batteries ProgramDesigned with Security and Longevity in Mind
The Reserva uses lithium iron phosphate cells, known for their safety, thermal stability, and long lifespan. It’s built to be installed indoors or in protected outdoor areas, and every model comes with a 10-year warranty.
Your system data is stored securely on European servers, in line with international security standards ISO27001. Fronius also conducts regular audits and requires its developers to undergo secure coding training—details that many battery providers often don’t make transparent.
For monitoring, Fronius offers the Solar.web platform, which gives you an at-a-glance view of your battery, solar inverter, and other connected devices—all from one app, without needing third-party tools.
A Complete System, One Point of Contact
For those already using Fronius gear—or planning to—it’s worth noting that the Reserva works seamlessly with other Fronius products like the GEN24 Plus hybrid inverter and the Wattpilot EV charger. It’s part of an all-in-one solar solution that covers generation, storage, EV charging, and monitoring.
And because it’s all under the same brand, service and support tend to be more straightforward. Fronius offers remote troubleshooting, 24/7 self-service tools for installers, and technical support across different time zones.
Launching in October
The Fronius Reserva is set to hit the Australian market in October and is now available for pre-order through authorised partners. It’s not necessarily the cheapest battery out there, but for households looking for quality, smart integration, and strong after-sales support, it’s a serious option to consider.
Who Is Fronius?
Founded in Austria in 1945, Fronius began as a small repair shop and has since grown into a global technology company. Today, they specialise in solar energy, welding technology, and battery charging systems. Known in the solar world for their inverters and system monitoring tools, Fronius has a solid reputation for innovation and reliability, with a strong footprint in Australia. Their focus is on building energy solutions that are efficient, durable, and easy to manage.
Read Australian Fronius Battery Customer Reviews
Article information source: Fronius Reserva Energy Storage
