Fast read
Australia’s residential battery market is crowded, but five names keep rising to the top in 2025: Sigenergy, Sungrow, Tesla, FranklinWH, and Enphase. Sigenergy’s integrated SigenStor promises future-proof flexibility; Sungrow’s modular SBR HV remains an installer favourite for value; Tesla’s Powerwall 3 delivers high capacity with a slick app; FranklinWH targets whole-home backup; and Enphase’s IQ Battery 5P offers rock-solid reliability with a 15-year warranty. All five use safe lithium-iron-phosphate (LFP) chemistry and sit on the Clean Energy Council (CEC) approved products list, but each suits slightly different homes, budgets ,and performance goals.
What are the top 5 solar battery brands in Australia?
Every battery decision should start with a simple audit: How much electricity do I use after sunset, how often do I lose grid power, and what is my budget? Australia’s generous sunshine, time-of-use tariffs, and shrinking feed-in credits make “self-consumption” storage attractive, yet needs vary by state (e.g., South Australia’s 30-minute wholesale pricing vs. Queensland’s flat tariffs). All five brands below are available nationwide and backed by local warranty agents, giving Australian homeowners strong choices no matter the roof size or climate zone.
Sigenergy: An integrated, future-proof all-rounder
Sigenergy burst onto the scene in late 2023 with the SigenStor—a stackable tower combining a hybrid inverter, 5 kWh or 8 kWh battery modules, and an optional 25 kW DC EV charger in one IP-65 cabinet. Its AI-driven energy management predicts load and weather, shifting solar into the
battery when tariffs rise and switching to backup in <20 ms during blackouts. The system allows bidirectional EV charging (V2H/V2G)—still awaiting widespread DNSP approval but ready when regulations catch up.
Why choose it?
- All-in-one design cuts install time and wall clutter.
- Modules mix and match, so adding capacity later doesn’t waste older packs.
- Suit homeowners planning an electric vehicle or full-home backup in the future.
Watch-outs: As a 2022 start-up, Sigenergy lacks Tesla-length track records and commands a premium price. Always verify the local service agent’s response times.
Sungrow: Modular value with proven local support
Chinese-engineered Sungrow SBR HV batteries (9.6–25.6 kWh per stack) pair neatly with Sungrow hybrid inverters that many Australian installers already know inside out. Round-trip efficiency tops 96 % in DC-coupled mode, and you can oversize the PV array to 150 % of the inverter rating—handy for winter charging in Melbourne or Hobart.
Why choose it?
- Competitive $/kWh without sacrificing quality.
- 10-year warranty backed by an Australian office and spare-parts hub.
- LFP chemistry and passive cooling for bushfire-prone regions.
Watch-outs: The app has improved, but still feels utilitarian beside Tesla’s. Aesthetic-minded owners may prefer a sleeker enclosure.
Tesla: High-capacity icon with polished user experience
The Tesla Powerwall 3 (13.5 kWh usable) folds a 20 kW, three-MPPT solar inverter into its slim casing, making it an elegant single-brand package for new builds. Its celebrated mobile app shows real-time flows with addictive animations, and over-the-air firmware has steadily added modes like Storm Watch and dynamic tariff shifting.
Why choose it?
- Big single-unit capacity covers most four-bedroom homes.
- Market-leading app and active community support.
- Proven longevity: Powerwall 2 installations from 2017 still deliver ~90 % of original capacity.
Watch-outs: Pricey, and the Powerwall 3 backs up only one phase unless extra wiring is added on three-phase sites. For retrofits, the AC-coupled Powerwall 2 may still be simpler.
FranklinWH: Whole-home backup for demanding loads
US-designed FranklinWH aPower (13.6 kWh) plus aGate controller is built around the idea that Aussies don’t just want the fridge on during an outage—they want the whole home humming. The aGate’s automatic transfer switch isolates the property inside 15 ms and can blend battery power with a generator for multi-day storms. Up to 15a Power units stack to 204 kWh, making it a left-field option for farms or off-grid holiday houses.
Why choose it?
- True whole-home backup, not just essentials.
- AC-coupled, so it bolts onto any existing PV inverter.
- Smart reserve function keeps a buffer for unexpected blackouts.
Watch-outs: Newer arrival (first AU installs in 2023) and higher upfront cost. Commissioning is more complex, so a CEC-accredited installer experienced with FranklinWH is a must.
Enphase: Ultra-reliable, long-warranty modular storage
If you already have Enphase microinverters—or just want bulletproof reliability—the Enphase IQ Battery 5P is hard to beat. Each 5 kWh pack has its own microinverter, eliminating a single point of failure and letting you start small. The 15-year / 6,000-cycle warranty is among the longest on the market, and performance data from thousands of Aussie rooftops shows degradation under 2 % per year.
Why choose it?
- Simple plug-and-play retrofit to any inverter brand.
- Exceptional warranty and proven LFP safety.
- Distributed architecture keeps the lights on even if one module goes offline.
Watch-outs: Higher cost per kWh at small sizes, and a five-unit 25 kWh system occupies more wall space than one large battery.
How to pick the best solar battery for your home
- Match capacity to load: Review at least 12 months of bills—aim to cover 70–90 % of nightly usage. Oversizing adds cost with diminishing returns.
- Check backup needs: If blackouts are rare, a simpler battery without a gateway can save thousands. For frequent outages, confirm whole-home vs. essential-circuit capability.
- Confirm compatibility: For retrofits, AC-coupled batteries (Tesla 2, FranklinWH, Enphase), avoid replacing the existing inverter. New builds may lean toward DC-coupled all-in-ones (Sigenergy, Sungrow, Tesla 3).
- Scrutinise warranties: Look for 10–15 years, ≥60 % retained capacity, and an Australian-based service team.
- Factor in incentives: Small-scale Technology Certificates (STCs) reduce upfront solar costs nationwide; several states add battery rebates—always check current programs.
- Choose the right installer: A CEC-accredited designer/installer will size the system, lodge DNSP approvals, and wire backup circuits to AS/NZS 5139 safety standards.
The bottom line
Australia’s sunny climate and evolving tariffs make 2025 an excellent time to add a battery—if you choose wisely. Sigenergy leads on integration and EV readiness, Sungrow on value, Tesla on capacity and polish, FranklinWH on whole-home resilience, and Enphase on modular reliability. Balance capacity, warranty, backup needs, and budget, then engage a trusted CEC-accredited installer to unlock years of lower bills and greater energy independence.
For tailored advice and quotes from vetted local experts, Your Energy Answers can connect you, free of charge, to installers who know their way around these top brands.
