Fronius is an Austrian solar technology company known for its high-quality inverters and battery storage systems. The Reserva battery range is designed for seamless integration with Fronius GEN24 Plus hybrid inverters, delivering high efficiency, reliability, and long-term performance for Australian homes.
The Fronius Reserva battery range offers high-efficiency energy storage that integrates seamlessly with Fronius hybrid inverters such as the GEN24 Plus. With over 80 years of engineering experience, Fronius positions the Reserva as a premium storage option designed for maximum efficiency and long-term reliability, especially when paired with a complete PV system.
Fronius systems in Australia are installed by Axial’s expert team, with local support available through the Melbourne office and technical teams across the country.
Why Choose Fronius Reserva for Melbourne Homes?
Fronius offers a complete solar solution with the Reserva battery at its core:
- Fully matched system from PV generation to energy storage and monitoring
- Single point of contact for service and technical support
- Full integration with system components, reducing setup time and complexity
- Backed by manufacturer warranty and decades of industry experience
The optimal interaction between the GEN24 Plus hybrid inverter, the Reserva battery, and Solar.web ensures efficient and reliable operation without relying on third-party tools.
Which Battery Size Suits Your Home?
Choosing the right battery size depends on home size, energy usage patterns, and backup requirements.
| Household Size | Usage Pattern | Recommended Capacity | Best For |
| 1–2 people | Mostly daytime | 6.3–9.5 kWh | Apartments, small homes, daytime solar use |
| 1–2 people | Heavy evening use | 9.5–12.6 kWh | Evening loads, partial EV charging |
| 3–4 people | Balanced day and night | 12.6–15.8 kWh | Standard family homes |
| 4–5 people | High evening demand | 15.8 kWh and above | Larger homes, EV ready |
| 5+ people / small business | High and continuous load | 15.8 kWh and above | Large homes, workshops, small commercial sites |
Think of this table as a starting point give Axial a call for a free, tailored quote for your home.
Price and Value Considerations
Battery pricing for Fronius systems depends on capacity, installation complexity, and site conditions.
Indicative Installed Price Guide (AU, 2026)
| Model | Usable Capacity | Indicative Installed Price |
| Reserva 6.3 | 6.31 kWh | 9000 – 10500 AUD |
| Reserva 9.5 | 9.47 kWh | 10000 – 12000 AUD |
| Reserva 12.6 | 12.63 kWh | 12000 – 14000 AUD |
| Reserva 15.8 | 15.79 kWh | 14000 – 17000 AUD |
Final pricing varies based on system size, electrical requirements, and installer rates. A site consultation is recommended for an accurate quote.
How Fronius Reserva Benefits Your Home
- Store excess solar energy for use at night or during peak tariff periods
- Reduce reliance on the grid and lower electricity bills
- Provide backup power to designated circuits during outages
- High efficiency thanks to DC-coupled charging with minimal losses
- Optimised charge and discharge performance with GEN24 Plus
- LiFePO4 battery chemistry for safety and durability
Contact us today for a free consultation and personalised quote we’ll help you find the right solar and battery solution for your home.
How Fronius Reserva Works?
DC Coupling for Maximum Efficiency
- Solar energy flows directly into the battery with minimal conversion losses
- Charging and discharging efficiency is higher than typical AC-coupled systems
- High-voltage architecture enhances cost-effectiveness
Optimised Charge and Discharge
- The GEN24 Plus hybrid inverter ensures fast charging and stable discharging
- Even short periods of sunlight are efficiently used
- Battery can supply energy to the home during peak periods or outages
Monitoring and Solar.web App
Fronius provides a comprehensive monitoring and energy management experience accessible via mobile or desktop.
Real-Time Monitoring:
- View live PV generation, battery charge and discharge, total household consumption
- Track grid import and export patterns
Historical Insights and Analysis:
- Daily, weekly, and monthly performance graphs
- Exportable reports for optimisation and energy tracking
- Performance insights for cost-saving opportunities
Alerts and Support:
- Instant notifications for system faults or unusual behaviour
- Remote access for Fronius technicians for troubleshooting
- No need for multiple third-party tools
Smart Features:
- The energy cost assistant automatically optimises storage strategy based on expected solar production, household usage, and electricity prices
- Intelligent management reduces costs and improves energy efficiency
- Control via mobile app and browser dashboard
Smart Considerations Before Choosing Fronius
- Inverter compatibility: Best performance with Fronius hybrid inverters
- Usage pattern: Homes with high evening consumption may require larger capacity
- Expansion flexibility: Parallel operation up to 4 batteries
- Warranty and support: Ensure full coverage by following installation and service requirements
- AI energy optimisation: Helps households reduce electricity costs
- Check government rebates for extra savings
Technical Specifications
| Feature | Reserva 6.3 | Reserva 9.5 | Reserva 12.6 | Reserva 15.8 |
| Usable Capacity | 6.31 kWh | 9.47 | 12.63 | 15.79 |
| Battery Modules | 2 | 3 | 4 | 5 |
| Rated Voltage | 204.8 V | 307.2 | 409.6 | 512 |
| Voltage Range | 185.6–227.2 V | 278.4–340.8 | 371.2–454.4 | 464–568 |
| Chemistry | Lithium Iron Phosphate | LFP | LFP | LFP |
| Parallel Operation | Up to 4 batteries | Up to 4 | Up to 4 | Up to 4 |
| Protection Class | IP65 | IP65 | IP65 | IP65 |
| Temperature Range | -20 to +55°C | Same | Same | Same |
| Weight | 86.6 kg | 120 | 153.5 | 187 |
| Compatible Inverters | Fronius hybrid only | Fronius hybrid | Fronius hybrid | Fronius hybrid |
| Installation Altitude | Up to 2000 m | Same | Same | Same |
Find Your Exact Price
Contact the Axial team today to find the right Fronius Reserva system for your home, compare battery options, and check your rebate eligibility with expert guidance.
FAQs
How Long Does a Fronius Reserva Battery Last?
The lithium iron phosphate chemistry ensures a long lifespan, typically over 10 years depending on usage and environment.
What warranty comes with the battery?
The battery includes a 10-year warranty when installed by a certified Axial installer, covering both performance and manufacturing defects.
How Much Space Does a Fronius Reserva Battery Take?
Depending on the model, the battery footprint ranges from 860 x 780 x 176 mm to 1610 x 780 x 176 mm. It is designed for wall or floor installation with a compact, slim design.
What is the maximum power output of the battery؟
Output depends on the system size and inverter configuration. Paired with GEN24 Plus, the battery delivers high charge/discharge performance suitable for typical household loads.
Do Fronius Reserva Batteries Require Maintenance?
No routine maintenance is needed. The battery and inverter system are monitored via Solar.web, allowing remote diagnostics and firmware updates.
Can the Fronius Reserva Provide Backup Power During Outages?
Yes, it can supply power to selected circuits in your home during grid outages, depending on system configuration.
Which Fronius Inverters Are Compatible With the Reserva?
The Reserva is designed to work seamlessly with Fronius GEN24 Plus hybrid inverters, ensuring efficient and reliable system integration.
What Are the Typical Installed Costs in Melbourne?
Indicative prices range from AUD 9,000 for the Reserva 6.3 to AUD 17,000 for the Reserva 15.8, depending on system size, site conditions, and installation complexity.
Can multiple batteries be connected together?
Yes, up to four batteries can operate in parallel, offering scalable storage for larger households or higher energy needs.
How Is the Fronius Reserva Monitored?
Monitoring is via the Solar.web platform and mobile app, showing real-time solar generation, battery charge/discharge, household consumption, alerts, and historical performance data for smarter energy management.
