Best Fronius Inverters to Replace Your SMA in Australia (2026)

SMA has exited the Australian residential market, leaving thousands of homeowners searching for a worthy replacement. Fronius stands out as the closest match in philosophy, build quality, and monitoring capability. Both brands were born in Europe, both earned strong reputations among Australian installers, and both prioritise engineering over price competition. The transition from SMA to Fronius is as close to a like-for-like swap as the market offers.

Fronius now sells several inverter ranges across its residential lineup. Choosing the right model depends on your phase type, battery plans, and budget. This guide covers each option, compares pricing, and explains which Fronius inverter fits each SMA replacement scenario.

Why is Fronius the best like-for-like SMA replacement?

Fronius is the best SMA replacement because both brands share the same European engineering DNA, premium build standards, and installer trust. Fronius has been ranked Australia’s number one solar inverter in installer surveys for 5 consecutive years, making it the most recommended brand in the country.

The key difference is that Fronius has adapted where SMA did not. SMA never released a residential battery solution for the Australian market. Fronius invested heavily in hybrid technology with the Gen24 Plus range, which pairs with batteries from BYD and Fronius’s own Reserva line. That forward-thinking approach is a major reason SMA lost ground while Fronius gained it.

Here are the main reasons former SMA owners choose Fronius:

• Austrian-manufactured with active cooling and an IP66 weather rating, built to handle Australian conditions like extreme heat, coastal humidity, and dust storms
• Fronius Solar.web delivers detailed real-time monitoring, system analytics, and remote diagnostics that rival or surpass SMA’s Sunny Portal
• Fronius maintains a full Australian operation with local warranty support, training centres in cities like Sydney, Melbourne, and Brisbane, and dedicated technical staff
• The Gen24 Plus hybrid range fills the exact gap SMA left, offering battery compatibility and backup power in a single unit
• According to SunWiz’s 2025 Australian Solar Market Report, Fronius held approximately 18% of the residential inverter market, making it the top-selling premium brand

What makes the Fronius Gen24 Plus the standout hybrid upgrade?

The Fronius Gen24 Plus is the standout hybrid upgrade because it manages solar generation and battery storage in one unit while offering backup power options no SMA inverter ever provided. It comes in single-phase (Primo, 3-10kW) and three-phase (Symo, 6-12kW) variants.

The Gen24 Plus offers two backup modes. PV Point provides emergency power up to 3kW from solar panels alone during a grid outage, even without a battery. Full Backup requires a compatible battery but keeps your entire home running during blackouts. Few inverters at this price point offer both options.

Key Specifications

Who It’s Best For

• SMA Sunny Boy owners who want to add battery storage during their inverter replacement
• Homeowners in blackout-prone areas like regional Queensland, parts of Victoria, and South Australia who need backup power
• Anyone planning a solar-plus-storage system and wanting a single integrated solution rather than separate inverter and battery inverter units

Approximate Pricing (2026)

• Primo Gen24 Plus 5kW: ~$3,900
• Primo Gen24 Plus 6kW: ~$4,350
• Symo Gen24 Plus 8kW: ~$5,700

Which batteries pair with the Gen24 Plus?

The Gen24 Plus pairs natively with BYD’s HVS and HVM high-voltage battery modules. BYD is one of the most field-tested battery brands in Australian residential solar, with over 1 million systems deployed globally by 2025. This pairing gives SMA upgraders a proven, reliable storage path that SMA never offered.

Fronius has also released the Reserva battery as their own storage product. It is newer to the Australian market and has less field data than BYD options, but it benefits from tighter integration with the Gen24 Plus platform.

Is the Fronius Primo still the right choice for a simple string inverter replacement?

Yes. The Fronius Primo remains the most popular single-phase string inverter in Australia for homeowners who do not need battery storage right now. It has been the backbone of residential solar installations across the country for years.

The Primo suits SMA Sunny Boy replacements where the priority is proven reliability over hybrid features. It is efficient. It is well-supported by virtually every solar installer in Australia. And it costs less than the Gen24 Plus range, making it the right pick for budget-conscious upgrades.

Who It’s Best For

• Direct SMA Sunny Boy replacements on single-phase homes
• Homeowners who want proven, no-fuss reliability without battery complexity
• Budget-conscious upgrades where hybrid features like backup power, battery management, and energy shifting are not needed

What Fronius option suits three-phase homes replacing an SMA Sunny Tripower?

Three-phase homes should consider either the Fronius Symo (standard) or Symo Gen24 Plus (hybrid), depending on whether battery storage is part of the plan. Both are designed for larger residential and small commercial systems requiring three-phase output across properties like large family homes, hobby farms, and workshop setups.

The standard Symo offers the same build quality and monitoring as the Primo but in a three-phase configuration. The Symo Gen24 Plus adds battery compatibility and backup power. In practice, this means three-phase SMA owners finally have an upgrade path that includes storage, something SMA never provided for the Australian three-phase residential market.

Which Fronius model should you choose for your SMA replacement?

Your best Fronius model depends on two factors: your electrical phase type (single or three) and whether you want battery storage now or in the future. Use the table below to match your situation.

The Gen24 Plus costs more upfront, but it eliminates the need for a second inverter swap later. A standard Primo or Symo costs $1,000-$1,800 less but cannot add batteries without a full inverter replacement down the track.

What other inverter brands should SMA owners consider besides Fronius?

Fronius is the closest like-for-like SMA replacement, but brands like Sungrow, GoodWe, and Enphase each offer advantages depending on your priorities around price, battery integration, or roof complexity. No single brand is perfect for every situation.

• Sungrow offers the best value with strong hybrid inverters and their own battery range at lower price points than Fronius. Read our Sungrow battery guide for a detailed breakdown.
• GoodWe provides a wide range of hybrid and battery-ready inverters at competitive prices, with models covering 1kW to 100kW.
• Enphase takes a completely different approach with microinverters that carry 25-year warranties. They suit complex roofs with multiple orientations, shading from trees or chimneys, and tight spaces where a string inverter struggles.

For a full comparison of brands, technologies, and sizing, see our guide to choosing solar panels and inverters.

Fronius still wins the SMA replacement conversation for one reason: it matches SMA’s engineering philosophy while offering the hybrid and battery technology SMA never delivered. Homeowners who valued their SMA for its build quality, monitoring, and longevity will find Fronius the most familiar transition. Those who prioritise budget savings may prefer Sungrow. Those with complex roofs may prefer Enphase. But for a direct, like-for-like premium replacement, Fronius remains the strongest pick available in Australia in 2026.

Frequently Asked Questions

Can you replace an SMA inverter with a Fronius without changing your solar panels?

Yes. Solar panels operate independently of inverter brand, so your existing panels from manufacturers like Trina, Jinko, or LONGi will work with a new Fronius inverter. A qualified SAA-accredited installer will check your panel string configuration and ensure voltage and current compatibility. In most cases, it is a straightforward swap completed in 2-4 hours.

Is the Fronius Gen24 Plus worth the extra cost over a standard Primo?

The Gen24 Plus is worth the premium if you plan to add battery storage within the next 3-5 years. It eliminates the need for a future inverter swap, which would cost $1,500-$3,000 in labour and equipment. The standard Primo offers excellent value and proven reliability for homeowners with no battery plans.

How long does a Fronius inverter last?

Fronius inverters typically last 15-20 years, comparable to SMA’s track record. They come with a standard 5-year warranty, extendable up to 20 years through Fronius’s warranty extension program. Many early Fronius installations across Australia are still running well after 10+ years of service.

Will Fronius leave Australia like SMA did?

No company can guarantee its future decisions, but Fronius appears better positioned than SMA was. Fronius maintains a full Australian operation with offices, training centres, and technical staff. They have invested in hybrid and battery technology, which was the exact area where SMA fell behind. Their consistent market share growth in Australia over the past 5 years suggests continued commitment.

How much does it cost to replace an SMA inverter with a Fronius?

The inverter itself ranges from approximately $2,500 for a basic Primo to $5,700 for a Symo Gen24 Plus 8kW. Installation typically costs $500-$1,500 depending on factors like your switchboard condition, cable run length, and location. Contact Solar Galaxy for a personalised quote based on your existing system.

Ready to upgrade your SMA inverter to Fronius?