Fronius GEN24 inverter Perth review: hybrid, warranty, and BYD compatibility

The Fronius GEN24 is an Austrian-made hybrid inverter, and for a Perth home adding solar and a battery it is one of the main alternatives to the Sungrow SH series. It comes in two forms: the Primo GEN24 for single-phase homes (3-10kW) and the Symo GEN24 Plus for three-phase homes (6-10kW). Each unit runs solar, battery, grid, and household load from one box, so you skip the separate battery inverter that older setups needed. It pairs on the DC side with BYD's Battery-Box Premium, backs up selected circuits during an outage, and carries a 5+5 year warranty (five years of full cover, then five more parts-only after you register).

That is the short version. Here is the detail, and the couple of places where a Fronius quote is worth a second look before you sign.

---

What does GEN24 actually mean?

GEN24 is Fronius's fourth generation of home inverters. The change that matters is built-in battery management: the inverter talks to the battery directly, so there is no second box on the wall.

The range splits by phase:

• Primo GEN24 Plus (single-phase, 3-10kW): the fit for most Perth homes, which run on a standard single-phase connection.
• Symo GEN24 Plus (three-phase, 6-10kW): for three-phase homes, or systems around 10kW and up. Larger three-phase jobs move to Fronius's separate Verto Plus family, not the Symo GEN24.

Both are true hybrids. One unit manages solar, battery, grid, and load together, which is why they replaced the older two-box approach of a string inverter plus a separate battery inverter. If you are still weighing where the battery should connect, our guide to DC-coupled versus AC-coupled batteries in Perth walks through why it changes efficiency and cost.

---

Which battery pairs with the Fronius GEN24 in Perth?

The GEN24 pairs with BYD's Battery-Box Premium HVS and HVM, on a DC-coupled connection. The battery sits on the inverter's DC bus rather than hanging off the grid side as a separate AC unit, which is the more efficient way to charge from your own panels.

BYD Battery-Box Premium HVS is the common pairing for a typical Perth home:

• Built from 2.56kWh modules. The smallest configuration is two modules (5.12kWh), and you can stack up to five for 12.8kWh usable.
• High-voltage system, so it needs a certified installer and the correct isolation hardware.
• Round-trip efficiency around 96%, meaning roughly 96% of what you put in comes back out.

Need more than 12.8kWh? That is where the HVM steps in: it uses 2.76kWh modules, three to eight of them, for 8.3-22.1kWh usable. The two are easy to mix up in a quote, so check which one you are actually being priced for. Our Sungrow versus BYD battery comparison for Perth sizes both against the main rival.

One WA-specific check: the WA Battery Scheme (Synergy customers, $130/kWh, capped at $1,300) requires the battery to be paired with an inverter approved for DER Storage on Synergy's Supported Solutions List (SSL), and requires you to be enrolled in an approved VPP or Battery Rewards program. The SSL is an inverter approval list, so eligibility follows the inverter pairing, not the battery badge. It is updated periodically, so confirm the Fronius Symo GEN24 is currently SSL-approved for DER Storage, and your exact battery and inverter combination, at synergy.net.au/Global/SSL before you commit.

---

Can the Fronius GEN24 keep the lights on in a blackout?

Yes, with the right setup. In a battery-paired system the GEN24 Plus offers backup power through the Backup Interface. To get it you need three things:

1. A Fronius Smart Meter, so the inverter can read your grid connection.
2. A battery with enough charge in it to carry your loads.
3. Wiring by a licensed electrician to a dedicated backup circuit (or whole-home backup on smaller systems).

When the grid drops, the GEN24 Plus and BYD battery keep a chosen set of circuits alive: usually the essentials like lights, the fridge, and phone charging. It is a question we hear a lot from Perth households after recent Synergy outages.

How long the backup lasts comes down to how much battery you have and how much you draw. As a rough illustration, a 10kWh battery covering 5kWh of essential loads a day gives you around two days, before any solar recharge. Your real number depends on your loads and any reserve the system holds back. For a fuller breakdown, see how long a home battery runs your house in a Perth blackout.

---

Solar.web monitoring

Fronius runs Solar.web as its monitoring platform, in a browser or the Fronius Solar.web app.

It shows you:

• Real-time generation, consumption, battery state, and grid import and export
• Daily, monthly, and annual yield history
• Performance benchmarks against similar Fronius systems
• Fault and alert notifications

Solar.web has a solid reputation with Australian installers for reliability and depth of data. The Fronius Smart Meter (the same one the backup function needs) adds whole-home energy flow on top of solar generation, so you can see where your power is actually going.

---

How efficient is the Fronius Primo GEN24?

The Primo GEN24 Plus runs at:

• Peak efficiency: around 97.6%
• European (weighted) efficiency: around 97%
• MPPT inputs: 2

The weighted figure is the one that matters day to day, since peak only happens at one specific load point. If you want to understand which numbers on an inverter datasheet actually predict real output, our guide on how to read solar inverter specifications is the place to start.

Against the Sungrow SH series, the efficiency is close enough that it barely moves your annual generation. In Perth conditions the difference from inverter efficiency alone is negligible in practice. Where the two brands actually diverge is warranty, service, and price, so that is where to focus.

---

What is the Fronius GEN24 warranty in Australia?

This is the part most quotes get wrong, so it is worth pinning down.

The Fronius GEN24 warranty in Australia is 5 + 5, for 10 years total:

• Years 1-5: Fronius Warranty Plus, which covers parts, labour, and transport.
• Years 6-10: a free five-year extension, activated by registering the inverter online through Solar.web. This second period is parts only, so it does not include the labour or transport cover of the first five years.

The real differentiator is that the extension to 10 years is free and comes just from registering, where several competitors charge for the equivalent. Just read the fine print: the back half is parts-only, not the full cover you get in the first five years. Fronius also runs occasional promotions that add cover on top, so ask your installer what is current when you buy.

Fronius has sold solar inverters in Australia for over 15 years and keeps a strong local service network, with Perth-based, Fronius-trained technicians reachable through its certified installer network.

---

Fronius GEN24 versus Sungrow SH for a Perth home

Both are proven hybrid inverters with solid Australian track records. Here is how they line up:

For a head-to-head on this exact pairing, see our dedicated Fronius GEN24 versus Sungrow SH guide for Perth.

---

What does a Fronius GEN24 system cost in Perth?

Installed pricing swings a lot with roof complexity, system size, battery size, and which installer you use, so a single headline number would mislead more than it helps. As a rule, a Fronius GEN24 and BYD system carries a modest premium over an equivalent Sungrow SH system for the same solar and battery size.

The way to get a real figure is an itemised quote for your roof and your battery size, with the panels, inverter, battery, and install broken out separately so you can see where the premium sits. If a quote lumps everything into one number, ask for the breakdown. Before you compare quotes, it is worth checking your installer's credentials so you know the cheaper number is not coming from a cut corner.

---

When does the Fronius GEN24 make sense in Perth?

Lean towards Fronius when:

• You value the free 10-year cover (five years full, five years parts-only) over a paid extension elsewhere.
• You want Fronius's Australian service heritage and the depth of Solar.web monitoring.
• You are comfortable paying a little more upfront for the brand and its track record.

Sungrow SH is the better call when:

• Lowest cost per kW of hybrid capacity is your main driver.
• Your installer has more Sungrow commissioning experience.
• You want the widest Perth service network for future warranty claims.

Both are genuinely good inverters, and for most Perth homes either one will run a solar-plus-battery system well for its full life. In practice the deciding factors are your installer's experience with the brand and whether the free 10-year warranty is worth the small premium to you. Run the numbers on your own roof, get the quote itemised, and the right answer usually becomes clear.