Celtic Solar
Premium Solar Batteries that Maximise Your Savings
Smart Battery Storage Solutions for Homes and Businesses
Our Solar Batteries
Maximise your energy independence and reduce your reliance on the grid with a premium battery storage solution. By storing the excess energy your panels produce during the day, you can power your home through the night and provide essential backup during grid outages. Our curated range of batteries is chosen for their depth of discharge, long-term cycle life, and ability to integrate seamlessly with both new and existing solar arrays.
Sungrow SBR (High Voltage)
The SBR series is the standard residential workhorse, designed for typical Australian households. It utilises 3.2kWh modular units that stack together, allowing for a total capacity between 9.6kWh and 25.6kWh per tower. This high-voltage LFP system is highly efficient and perfectly matches Sungrow’s single-phase and smaller three-phase hybrid inverters.
Ideal for daily solar self-consumption, the SBR provides a steady 30A continuous current to power standard household loads like lights, entertainment, and kitchen appliances. Its compact footprint and “plug-and-play” design make it a cost-effective and reliable entry into the battery storage market for homeowners seeking to eliminate evening power bills.
Features a 10-year performance warranty (70% capacity retention). It remains a proven, value-driven choice for families who do not require industrial-grade discharge for high-power machinery.
Sungrow SBH (High Power)
The SBH is the “premium” high-performance evolution of the Sungrow range, engineered for larger homes and high-energy users. It utilises larger 5kWh modules, allowing for massive capacities of up to 40kWh per tower. The key difference lies in its power delivery: the SBH provides a massive 50A continuous current, allowing it to handle much heavier electrical loads than the SBR.
If you run multiple air conditioners, pool heat pumps, or rapid EV chargers, the SBH is the superior choice. Its higher voltage architecture is specifically designed to pair with the larger Sungrow three-phase inverters, offering significantly more “punch” during grid outages and peak demand periods.
Backed by a 10-year performance warranty, but with a higher energy throughput guarantee than the SBR. It is the definitive solution for high-demand properties requiring maximum backup strength and faster charging speeds
Sigenergy (SigenStor)
The SigenStor is a versatile, DC-coupled storage solution that forms part of an integrated energy ecosystem. Its unique modular stacks allow you to start with a smaller capacity and add modules seamlessly over time. This system is particularly noted for its sleek, space-saving tower design that eliminates wall clutter.
Beyond storage, Sigenergy offers industry-first safety features, including built-in fire suppression at the module level. Its AI-native management system optimises battery usage based on your habits and weather forecasts, while the system remains fully future-proofed for V2H/V2G electric vehicle integration.
Backed by a 10-year product and performance warranty, with an optional extension to 15 years. This provides long-term security for what is arguably the most advanced battery system on the market.
Franklin WH
The Franklin WH is a powerhouse of residential storage, featuring a massive 13.6kWh capacity per unit and 5kW of continuous power. It is designed for total home backup, capable of managing multiple energy sources—including solar, the grid, and even backup generators—via the intelligent aGate controller.
This system is ideal for larger households or those requiring “UPS-grade” backup performance. Its IP67-rated construction ensures it is one of the most durable batteries for outdoor Australian conditions. With its high-surge capacity, it can comfortably start and run heavy loads like air conditioners and pumps during a blackout.
Features a market-leading 12-year product and performance warranty, ensuring your investment is protected well beyond the industry standard 10-year period.
Tesla Powerwall
The Tesla Powerwall remains the global benchmark for smart, app-integrated energy storage. Its liquid-cooled LFP technology allows it to maintain peak performance even in extreme heat, while its sleek, minimalist design makes it suitable for both indoor and outdoor wall-mounting or floor-standing.
The Powerwall’s greatest strength is its seamless software integration. The Tesla app provides real-time visibility and control, allowing you to switch between self-powered mode, backup-only mode, or even participate in Virtual Power Plants (VPPs) to earn credits while supporting the grid.
Includes a 10-year warranty with an unlimited cycle guarantee for solar self-consumption and backup use, ensuring 70% capacity retention at the end of the decade.
BYD Battery Box Premium
The BYD Battery-Box Premium is a robust, high-capacity lithium storage system compatible with a wide range of leading hybrid inverters. Its modular design allows for significant scalability, making it a favorite for everything from standard residential setups to complex off-grid and commercial applications.
Utilising safe and long-lasting LFP chemistry, BYD batteries are designed for heavy-duty cycling. Their high-voltage series offers exceptional efficiency and high-power output, ensuring your home remains powered even during peak demand periods or extended grid outages.
Backed by a 10-year product and performance warranty, supported by BYD’s massive global presence and strong Australian service infrastructure.
Fronius Reserva
The Fronius Reserva is a premium, high-voltage modular storage solution purpose-built for seamless integration with Fronius GEN24 inverters. Available in towers ranging from 6.3kWh to 15.8kWh, it offers a compact, 170mm-deep profile that fits discreetly into modern homes and tight utility spaces.
Designed to high European standards, the Reserva provides reliable three-phase backup and “black-start” capability, ensuring you have power even if the grid fails while your battery is empty. It is the definitive choice for existing Fronius owners looking for a factory-matched, high-efficiency storage partner.
Comes with a 10-year Fronius Warranty Plus, covering the cost of materials, labour, and transport – providing complete peace of mind through a single, trusted service partner.
Our Services
Solar Systems
Customised residential and commercial solar systems built around your unique energy profile.
We manage the entire engineering and grid- connection process so you can simply sit back and save.
Ongoing repairs, health checks, and maintenance are available for all systems, regardless of who installed them.
Battery Systems
Premium battery storage options tailored to suit new or existing solar arrays.
These future-ready systems capture your surplus daytime generation to power your property cleanly through the night.
Rest easy with reliable backup power configurations designed to keep your home running smoothly during unexpected grid outages.
EV Charging
High-speed AC and DC charging solutions engineered for modern homes, workplaces, and commercial fleet depots.
Take complete command over your charging schedules, power sources, and delivery rates to match your lifestyle.
Seamlessly transition between rapid grid charging and 100% self- generated rooftop solar energy to reduce transport costs.
Home Electrification
Your comprehensive local solution for general electrical trade services, safety switch upgrades, and property rewiring.
Maximise your household savings by integrating smart and energy efficient appliances.
Transform your hot water system into a solar-powered battery using intelligent diversion hardware that runs on free daytime energy.
Why Choose Celtic Solar
For the Community
From sales to solar panel installation, everything at Celtic is done inhouse by local people. We’re proud to be one of Noosa’s longest standing solar businesses.
Industry Experience
We’ve been in the industry for around 20 years and have adapted as the industry has evolved. We offer solar panel, inverter, battery & EV charging installation and repairs for homes & businesses, including general electrical services.
Finding the Right System For You
We don’t believe in a ‘one size fits all’ solution. Instead, Celtic offers a complete personalised service that identifies the best ways to save you money on your energy bills.
Quality Products
Our team can source the best-in-class technology to suit your needs and budget. We work closely with local and interstate suppliers to make sure we give our customers the best products at the right price.
Empowering You to Make the Right Decision
We’re passionate about sharing our knowledge. We aim to educate our clients so they feel empowered to make the right decision and together, we can be confident that we’ve found the right solution to meet your needs.
Commitment to integrity of the Industry
We like to show our commitment to the industry by prioritising quality installations, adhering to evolving standards, and investing in ongoing training and accreditation. We support customers with transparent advice, reliable after-sales service, and long-term system performance. By staying engaged with industry developments and contributing to best practices, we build trust, improve outcomes, and strengthen the reputation of solar as a sustainable energy solution.
