Solar Panels Perth

What a solar system costs in Perth in 2026

On this page: what you could save · what our customers say · how many panels you need · the panels and the inverter · rebates · which way they face · installation · Synergy tariffs · already have solar · choosing a company · where we install · your questions.

Every system we install is SunPower Performance 7 panels with a hybrid inverter and, on almost every job, a home battery, designed on your roof by our own consultants and priced in writing. Positive Energy is a SunPower Elite Partner; the panel and the inverter are further down this page.

Start with your Synergy bill and find your daily usage in units. Then read across.

These are the same units Synergy bills you in, so the generation column and your bill line up. A household using 40 units a day is looking at the 10kW row. Both prices are after the rebates and are a guide; the solar-and-battery price is the package most people take. Every size, every battery pairing and the full price list are on our solar system prices page.

All prices on this page are a guide only. They are after the WA and Federal rebates. They assume a single-storey home with a tin roof, suitable switchboard space and a 2026 install date. Systems installed in 2026 carry this year's rebate level. It steps down on 1 January 2027. The full package list, with every battery pairing, is on our solar system prices page, and the packages are also in our shop.

Almost every customer now takes a battery with their solar panels. In 2026, 98 per cent of the systems we installed had one (measured from our own 2026 sales), and every package above includes one. The reason is simple arithmetic. A system sized to carry your whole day makes more at midday than a house can use at midday. Synergy's feed-in tariff is only available to systems with an inverter of 5 kW or less. The battery keeps that midday power for your evening. The batteries we pair with these panels, and how to size one, are on our solar batteries Perth page.

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How much could solar and a battery save you in Perth?

Move the slider to your Synergy bill and see an estimate for each size. The figure is the same model our consultants use in your quote, so what you see here is what your proposal will say. Your daytime use follows a typical Perth household pattern; the exact figures come from your bill.

Estimate for a north-facing Perth roof on the Synergy Home Plan (A1, $0.3326 a unit, 1 July 2026). Savings reflect the solar you use during the day and the battery you use at night, in line with how systems above 5 kW are sized to power your home. Single-phase pricing shown; three-phase is an additional cost, detailed in your quote. Prices are fully installed, inc GST, after the WA and Federal battery rebates plus solar STCs; a tile or double-storey install may add cost. Your final price and savings are detailed in your quote.

Want your exact numbers? Send us your latest Synergy bill. We read it line by line, apply every WA and Federal rebate you are entitled to, and show you what you would save at your home.

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What our customers say

We hold a 4.9 rating on SolarQuotes and 4.9 on Google across 449 reviews. Three things come up in those reviews again and again. Being kept informed from the first call to switch-on. A tidy install by a crew who turned up when they said they would. The paperwork done for them. A good number of our battery customers are people we installed solar for years ago.

Reviews sourced from Google and shown with attribution. A live selection of recent reviews; ratings update over time. Read all reviews on Google. Snapshot 3 August 2026.

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What happens after you send the form

One of our consultants calls you to go through your last bill and your roof. Then we visit your home, look at the roof, the switchboard and the meter, and design the system on your roof. You get a written proposal with the price, the number of panels, where they sit and what the system should generate.

We complete the Western Power and Synergy applications for you. There is nothing for you to lodge.

From signing to switch-on is about six to eight weeks. In busy periods it can be three to four months. We tell you which one applies to your home before you sign.

Prefer to see the equipment first? Visit our Osborne Park showroom, Monday to Friday 8am to 4pm, and bring your latest power bill.

How many solar panels does your home need?

Your Synergy bill prints your average daily usage in units. That number is where every design we do starts. Find it, then find the row in the table above that covers it. The panel count in that row is the starting point for your home.

Reading your bill

A unit is one kilowatt hour. Synergy bills you in units, and our table is in units, so the two line up with no conversion. If you would rather send the bill than read it, text a photo of it to the consultant on the call. Our guide to reading your Synergy bill after solar shows what changes once the system is on.

What moves you up a row

Two things move you up a row. An electric vehicle adds about the daily consumption of a small household on its own. A system sized only to today has you buying power again the first time something changes. A pool, a heat pump, someone moving home to work.

The consultant asks about all of them on the first call. A car that is coming next year is designed in now. It costs far less to add the panels while the crew is on the roof than to send them back later.

Is 6.6kW still enough?

For years 6.6kW was the standard size in Perth, because a 5 kW inverter kept the feed-in tariff. The value has moved. It now sits in the power you use yourself, and a battery needs a system large enough to fill it and run the house at the same time. That is why 10kW is the most common size we install today. The 6.6kW row still fits a smaller household with a daytime load. The fuller answer is in our guide, is 6.6kW solar still enough in Perth.

How many panels fit on the roof

We lay the panels out on your roof in the proposal, so you see the count and where each one sits before you sign. Most Perth roofs give us two to four faces to work with. A roof that is short of space is designed around, panel by panel. Where you would like the panels off the street face of the house, tell us, and most roofs give us a way to do it.

Solar alone, or solar with a battery?

Every package on this page includes a battery, because that is what 98 per cent of our customers chose in 2026. If you are starting with solar alone, ask for a hybrid inverter so a battery can be added later. How big the battery should be follows your evening use, and the sizing guide is on our solar batteries Perth page.

What makes solar panels perform on a Perth roof

Five things decide what you get out of a system over twenty years, and only one of them is the panel.

The panel: SunPower Performance 7

We install SunPower Performance 7 panels on every new solar system. Positive Energy is a SunPower Elite Partner. One panel, chosen on its warranty and its record, means every system we design, install and look after is built the same way.

The Performance 7 carries a 30-year warranty that covers the product, its power output and the service. Maximum degradation is 0.4 per cent a year, with a minimum warranted output of 99.0 per cent in the first year. On top of the panel warranty, our own installation workmanship is covered for 10 years.

Read the warranty document of any panel you are quoted. Look for one thing in particular: whether the cost of removing and reinstalling a panel is included, or left with the homeowner. It is the difference between a claim that costs you nothing and one that costs you a scaffold and a day of labour. It is written into the document, so read the document. Your rights under Australian Consumer Law sit alongside any manufacturer warranty and cannot be excluded. More on the panel is on our SunPower page, and the story of the partnership is in why we are a SunPower Elite Partner.

Over the years we have installed other panels too. Their reference pages stay on the site for the people who own them: Canadian Solar, Jinko Solar and Trina Solar. Every new system we design today is SunPower Performance 7.

The inverter

The inverter turns the panels' DC power into the AC power your home runs on. On a solar and battery system it also manages the battery, so the two are chosen together. We pair the panels with Fronius, Sungrow, SigEnergy and iStore inverters, with the inverter built into the Tesla Powerwall 3, and with a Fronius inverter on a BYD battery. The consultant recommends one for your home, your phase and the battery you choose. The range is on our solar inverters page.

The brands we install, and why

One panel, and a short list of inverters and batteries, each chosen for a reason. SunPower Performance 7 on every roof, for the 30-year warranty and the record behind it. SigEnergy SigenStor when you want the inverter, the battery, backup and an EV charger in one modular system that grows in 9 kWh steps. Sungrow SH hybrid inverters with the SBH battery for a strong system at a keen price. Fronius GEN24 and Verto inverters, made in Europe at Sattledt, Austria, with the Reserva battery for whole-home backup. Tesla Powerwall 3 when you want the inverter built into the battery. BYD on a Fronius inverter, and iStore for a well-priced battery with backup. The consultant recommends one for your home, your phase and how you use power, and the reasons are in the proposal.

Shade

Shade matters more than most people expect, because the loss is bigger than the shaded area. A shadow across the corner of one panel can pull that panel's output down by about a third. On a system wired through a single string inverter, every panel in that string works down to the level of the weakest one. A television aerial, a chimney, a neighbour's jacaranda in fifteen years.

There are three ways to deal with it, and we choose between them on your roof. Microinverters put an inverter on each panel, so each panel works on its own. Power optimisers keep the central inverter and clear the mismatch between panels; SolarEdge and Huawei have their own, and we use Tigo with everything else. SunPower panels also carry a bypass diode on each cell, so current keeps flowing through the cells still in full sun.

Your roof and your switchboard

Most Perth homes are single phase. Three phase changes the inverter we choose and the sizes open to you, so we check your meter box on the home visit. If you would like the panels off the street face of the house, tell us. Most roofs give us a way to do it. A switchboard that needs upgrading is priced in your written proposal, so there are no surprises on the day.

We install on tin and tile roofs across Perth, including terracotta. Each roof type takes its own mounting, which is one reason we visit before we design. If your roof is near the end of its life, say so early. It is usually cheaper to deal with the roof first than to take an array off and put it back.

The installation

Every system is installed by our accredited installers and signed off to Positive Energy's completion standards. Most installs take one to three days, and the crew walks you through the monitoring app before they leave.

What happens afterwards

Every system includes Positive Energy Protection, Powered by Omnidian. Our own engineers here in Perth look after your system from the day it is switched on, with 24/7 monitoring behind them. A problem shows up in the monitoring and gets fixed before it shows up on a bill. You call us, and we handle it.

Solar rebates in WA, and what comes off your price

Eligible solar panels earn small-scale technology certificates. You get one for each megawatt hour of power generated or displaced. We take the value off your price upfront, so there is nothing to claim back later. Battery systems also attract the WA and Federal battery rebates. The certificates reduce every January and end in 2030. A system installed this year carries a larger discount than the same system next year.

As a New Energy Tech Approved Seller, we claim your WA and Federal battery rebates for you. We also help you apply for a WA no-interest loan up to $10,000, powered by Plenti, if you want to use it. Every price on this page is shown after the rebates. Your exact entitlement is confirmed in writing on your quote. The three rebates, the eligibility rules and the loan are explained on our WA solar and battery rebates page. The scheme rules are published by Energy Policy WA and the Clean Energy Regulator.

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Which way should solar panels face on a Perth roof?

Most Perth roofs pitch at about 24 degrees and give you two to four faces to work with, so this is a real decision.

North gives you the most total generation across the year. A north-facing array in Perth produces about 4.4 units per kilowatt per day, averaged over a year (Global Solar Atlas). Nothing beats it for the raw total.

West gives you less over the year and more when it is worth the most. A west-facing array is still producing at four and five in the afternoon. That is inside the 3pm to 9pm window. There, a unit of Synergy power costs 55.3253c on the Midday Saver tariff, against 8.8520c for the same unit between 9am and 3pm. That is more than six times the price for the same kilowatt hour. It lands on the half of the day when a west roof is working and a north roof is winding down.

East is worth having when the household runs in the morning, and it pairs well with west across a ridge line.

In practice we split the array. A house with a battery, an electric vehicle or a pool pump is a different problem from a house that is empty until six. The split follows the household. We size for the whole day and the whole year. That means your daytime consumption, your evening load, how the roof performs in winter against summer, the shading, and the roof faces you have. The evening peak is one input among several.

How solar panel installation works in Perth, step by step

1. The call. A consultant goes through your last bill and your roof. We also ask what you expect to change: an electric vehicle, a pool, someone moving home to work.
2. The home visit. We assess the shading on site, and check the roof, the switchboard and the meter. Shade is the single most common reason a design changes, and it is the thing a desktop quote gets wrong.
3. The design. You get a written proposal with the panel count, the layout on your roof, the expected generation and the price. Two houses on the same street usually get two different designs, because the roof faces and the household differ.
4. Accepting the quote. You pay a deposit when you accept, and the balance is due on delivery of your system.
5. The applications. We complete the Western Power and Synergy applications for you. There is nothing for you to lodge and nothing for you to chase.
6. The install. Most systems go on in one to three days, depending on the size of the system and the roof.
7. Sign-off. The system is signed off to Positive Energy's completion standards before the job is closed.
8. Switch-on and monitoring. Positive Energy Protection starts the day the system is switched on.

From signing to switch-on is about six to eight weeks. In busy periods it stretches to three or four months. We tell you which one applies to your home when you sign.

What happens on install day

The crew arrives in the morning. They mount the rails and the panels, run the cabling, fit the inverter and the battery, and connect the switchboard. Then they test the system and set up the monitoring app with you. Most homes lose power for a short time while the switchboard is connected, and the crew tells you when. The proposal shows where the panels, the inverter and the battery go, so there are no decisions to make on the day.

Where the inverter and the battery go

The inverter and the battery go on a wall, usually in the garage or on an outside wall out of direct sun, close to the switchboard. Australian standards set clearances from doors, windows and habitable rooms, and we check them on the home visit. A battery needs a solid wall and clear space around it. If you would like the equipment out of sight, say so on the call and we design around it.

What your solar is worth on each Synergy tariff, including Midday Saver

Solar is worth what the power it makes would otherwise have cost you. That figure changes with your tariff and with the time of day, so it is worth seeing the actual rates.

Home Plan A1: the standard tariff. One flat rate of 33.2621c a unit at any hour, with a daily supply charge of 119.2419c. Every unit your solar covers is worth the same as any other.

Midday Saver: three rates in a day.

Daily supply charge 132.7806c.

EV Add-On: Midday Saver with an overnight window for charging a car, at 19.9172c between 11pm and 6am. Daily supply charge 132.7806c.

The number that does the work here is the gap between 8.8520c and 55.3253c on Midday Saver. That is the same kilowatt hour at more than six times the price, six hours apart, and it is the whole case for storage. A 10kW system generating 40 units a day makes most of them inside the 8.8520c window. A battery holds those units until the 55.3253c window and runs your evening on them. The batteries we pair with these systems are on our solar batteries page. Current rates are on Synergy's energy plans page.

One thing worth being straight about. Synergy's feed-in tariff is available to systems with an inverter of 5 kW or less. The systems on this page are larger than that, because that is what a Perth household needs to cover a whole day. So think about your solar panels in terms of what they save you. Every unit you generate and use yourself is a unit you do not buy at 33.2621c, or at 55.3253c in the evening. That is where the value sits, and it is why the size of the system and the battery behind it matter more than the export rate.

Which tariff suits a home with solar is a question on its own. Our guides Synergy A1 vs Midday Saver vs EV Add-On and the Synergy DEBS feed-in tariff go through it.

Rates shown are Synergy's SWIS residential rates including GST, current at 1 July 2026.

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Already have solar, or building new?

Adding a battery to the panels you have

About a third of the people who write to us already have solar on the roof. A battery can usually be added to it. Some inverters take a battery directly. Others need a hybrid inverter added. That is why we ask for a photo of your inverter and switchboard first. Around one in four batteries we install is a retrofit to an existing solar system. Retrofits qualify for the WA and Federal battery rebates, the same as a new system.

We retrofit SigEnergy, Sungrow, Tesla, BYD, Fronius and iStore batteries. Sizes, brands and prices are on our solar batteries page.

An EV charger and blackout backup can both be added later, and the systems on this page are designed with that in mind. If you know a car is coming, tell the consultant on the call.

Upgrading an old system

A system from the early years of solar in Perth is usually small, and its inverter is often near the end of its life. The old panels come down and a new system goes up, sized to the way the house runs now, with a battery and a hybrid inverter. A system from 2019 onwards can often keep its panels and take a battery. Which path fits your roof is in our guide to upgrading an old solar system in Perth.

Building a new home

Tell us before the walls are lined. Cables for the panels, the battery and an EV charger run inside the walls while they are open, so there is no conduit on the outside of a new home. The inverter goes in a cool spot near the switchboard, and the switchboard is sized with room for what comes later. The system goes on once the roof is on and power is connected. Our page on planning solar when building covers the block, the roof and single or three phase, and the guide new build solar in Perth covers the timing.

How to choose a solar company in Perth

Perth has many solar companies, and the quotes look alike on paper. Five things separate them, and each one can be checked before you sign.

1. Who designs it. A design drawn from a satellite image and a design drawn on your roof are different things. Shade is the single most common reason a design changes, and it is the thing a desktop quote gets wrong. Ask whether someone will visit before the price is fixed.
2. The warranty document. Ask for it and read it. Check who pays for removing and reinstalling a panel under a claim, and how long the workmanship on the install itself is covered. Ours is on our warranties page.
3. Who does the paperwork. Every system needs a Western Power application and a Synergy application. Ask who lodges them and who chases them. We do both, and there is nothing for you to lodge.
4. Who you call afterwards. Ask who answers the phone in year six. Every one of our systems includes Positive Energy Protection, Powered by Omnidian, with our own engineers in Perth and 24/7 monitoring behind them. You call us, and we handle it.
5. What the reviews say about the years after. Read past the install day. Being kept informed, the paperwork done, and a person who answers the phone are the three things our reviews come back to.

Positive Energy is a New Energy Tech Approved Seller and a SunPower Elite Partner. Every system is installed by our accredited installers and signed off to Positive Energy's completion standards. The awards and ratings in the pills at the top of this page are earned on installation and review data. Two of our guides go deeper: how to choose a solar installer in Perth and how to read a solar quote.

Where we install across Perth

We install solar panels from Yanchep in the north to Mandurah in the south, and inland as far as Northam. That covers the whole Perth metropolitan area and the Peel and Avon regions around it.

Our recent installs, with photos, are in the installs gallery.

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Your solar panel questions, answered