Fixed-price solar and battery packages in Perth

Packaged solar and battery bundles arrived in metro Perth on 5 August. One price on the page, four battery sizes, installation included.

If you are weighing one up, start here: a package can be a perfectly good buy. Plenty of Perth homes want exactly what these bundles contain and would be worse off paying for a bespoke design they do not need. The question is not whether packages are legitimate. It is whether the five things below have been answered before you pay a deposit, because in Western Australia four of them move the number a long way.

The state rebate stops paying at 10kWh

The WA Residential Battery Scheme pays Synergy customers on the SWIS $130 per usable kWh, capped at $1,300. The cap lands at 10kWh. A 20kWh battery collects the same $1,300 as a 10kWh one, so the second half of that battery arrives with no state support behind it at all.

Two conditions come attached. Virtual Power Plant (VPP) participation is mandatory, not optional, so you are agreeing to let the battery be dispatched. And the rebate is claimed through an approved vendor, which means the question to ask is whether whoever is selling you the package is on that list. If they are not, the $1,300 does not appear.

Horizon Power customers get a much better deal at $380 per usable kWh capped at $3,800, but that is regional Western Australia. If you are in the metro area, you are on the Synergy number.

Here is the part worth saying plainly, because it costs us work to say it. Most Perth homes we quote do not need 20kWh. If your evening load is a couple of appliance cycles and a ducted system running until nine, 10kWh covers it, the rebate is fully used, and you keep the difference. Buy the top of the menu only if you can point at the evening consumption that justifies it.

Choosing an export pathway

Since 1 May 2026, Western Power offers two ways to connect. Flexible exports, which requires Emergency Solar Management (ESM) and VPP-capable equipment. Or a fixed export limit of 1.5kW. Total inverter capacity across the site, solar and battery combined, is capped at 30kVA either way.

That choice is not a detail. Land on the 1.5kW fixed pathway and almost all of the export side of the deal disappears. Ask which pathway the package is being connected under, and get the answer before deposit rather than at commissioning.

Perth pays 10 cents between 3pm and 9pm, and 2 cents the rest of the day

Those are the current Distributed Energy Buyback Scheme (DEBS) rates, and they are the reason a Perth system is judged differently from an east coast one. Exporting hard at midday earns 2 cents. The money sits in what the battery puts back into the house after three in the afternoon.

So the useful test on any package is not how many panels it has. It is whether the battery covers your evening, and whether the array is oriented to fill it. A large array facing the wrong way with a small battery is a worse outcome in Perth than a modest array with a battery sized to the evening. Feed-in rates are reviewed annually and can change.

Roof and switchboard assessment

A packaged quote is built from a postcode and a bill. That works until it meets an actual Perth house.

The things it misses here are consistent. Tile roofs need different mounting hardware and more labour than the tin the price was probably modelled on. Two-storey access changes the job. A switchboard that is full, or has no main switch space, has to be upgraded before anything gets connected, and that is a separate trade and a separate cost. Older stock through the inner suburbs can have asbestos eaves, which changes how the cable gets in. None of that is exotic. All of it is normal in this city, and none of it is visible from a postcode.

Ask for a site inspection before you sign rather than after. A seller who will not look at the roof before quoting it is asking you to carry the risk that the roof is ordinary.

Get the add-ons itemised before the deposit

Packaged offers across this market carry supplementary charges, and they are not hidden if you ask: two-storey access, longer cable runs between the array and the inverter, three-phase, and fire-rated panels where the property sits in a bushfire-prone area. Any of those can move a fixed price by several hundred dollars.

Installer and retailer credentials

This one is worth understanding because the language gets used loosely across the industry.

Solar Accreditation Australia (SAA) accredits individual designers and installers, not businesses, in classes including grid-connected photovoltaic (GCPV) and grid-connected battery storage (GCBS). So "SAA accredited installers" describes the people who turn up, and it is a fair claim, but it tells you nothing about who holds your contract. The retailer credential is separate: New Energy Tech Consumer Code (NETCC) Approved Seller, administered by the Clean Energy Council.

Three questions cover it:

• which entity is named on the contract;
• who honours the warranty in year six if the brand behind the panels has changed hands; and
• whether you can choose your installer or get assigned one.

Compare the complete packages

If a package covers your evening consumption, the seller is an approved vendor for the state rebate, and somebody has looked at your roof before quoting it, buy it with confidence. That is a good outcome and you should not pay more for the privilege of a custom design.

If any of those three is missing, get one comparison quote that includes a site inspection and put the two side by side with the add-ons filled in. Half an hour of comparing beats ten years of living with the wrong size.

A package is fine. A package nobody has matched to your roof is a guess with a price on it.

Compare a packaged bundle against a system designed for your address.