Are solar batteries worth it in Perth?

For most Perth homes with existing or planned solar, yes. With the WA Residential Battery Scheme stacked on top of the federal Cheaper Home Battery Program, total rebates on a 10kWh battery can reach around $5,000. Typical battery payback in Perth is now 5 to 6 years, well inside the 10-year warranty most quality batteries carry.

Solar Panel Installation Perth: A Local’s Guide

By The Solar Guide.

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Perth Solar & Battery Guide: Everything You Need To Know Written By Local Experts.

Perth is one of the best places in the country for solar, but how you set it up matters more here than almost anywhere else. You’ve got long, clear sunny days and strong generation, but most of that solar is produced before 3pm, when export rates are at their lowest. At the same time, electricity in the evening can cost four or five times as much. That gap is where the real value is. It’s why more Perth homeowners are focusing on using their own solar or storing it in a battery, especially now with generous WA battery rebates helping bring the cost down.

That’s where the local detail comes in. Between Western Power and Synergy rules, strong afternoon sun, and that 3pm pricing structure, system design in Perth is very different to the east coast. A good local installer won’t just default to a standard north-facing layout. They’ll often lean into west-facing panels to capture higher-value afternoon generation and design around how your household actually uses power. With system size limits set to open up from 2026, these design decisions are only becoming more important.

On top of that, systems in Perth need to be built for the conditions. High heat, strong UV, and coastal salt air in many suburbs will quickly show up any weaknesses in cheaper gear. It’s also common to run into older switchboards that need upgrading before solar can be installed.

That’s why going local matters. A Perth-based installer understands how all of these pieces fit together and can design a system that performs properly in the real world, not just on paper. This guide is here to walk you through it all in plain English, so you can make the right call and end up with a system that delivers consistent savings over the long term.

If you’re ready to chat with a local installer who knows Perth solar from real world experience, see our top 3 rated installers in Perth.

What are the key differences for Perth solar?

Five things set Perth apart from the rest of the country. If you take nothing else from this page, take these.

1. The 3pm feed-in cliff shapes every decision

Synergy (Perth’s main electricity retailer) pays two very different rates for the solar power you export to the grid:

2 cents per kWh for power exported before 3pm
10 cents per kWh for power exported between 3pm and 9pm

Your panels make most of their power before 3pm. Which means most of what you could export is worth almost nothing.

Why this is the biggest deal on this page: the gap between 2 cents (the midday export rate) and 32 to 45 cents (what Synergy charges you in the evening) is where every good Perth solar decision is made. Self-consumption beats export. West facing panels often beat north facing panels here. Batteries make better sense in Perth than almost anywhere else in Australia, because the gap is so wide.

2. Perth has the best battery rebate in the country

As of July 2025, the WA Residential Battery Scheme gives Synergy customers up to $1,300 off a battery (calculated at $130 per kWh of capacity). Horizon Power customers get up to $3,800.

Stacked on top of the federal Cheaper Home Battery Program, total discounts on a 10 kWh battery can reach around $5,000. No-interest loans of up to $10,000 are also available for households with joint income under $210,000.

The practical impact: five years ago a Perth battery was a long conversation about whether it paid off. Today, with the stacked rebates and Perth’s tariff structure, typical battery payback is 5 to 6 years. That’s well inside the 10 year warranty most quality batteries carry. For most homes with existing or planned solar, the answer is now clearly ‘yes, add a battery’.

3. The May 2026 rule change opens up the opportunity for larger solar systems

Western Power (the state owned company that owns the poles and wires) has historically capped how much solar you can send back to the grid. Single phase connections are limited to 5kW. Three phase connections to 15kW.

From 1 May 2026, you can install up to 30kVA of inverter capacity (more than enough for any home), provided the system either:

Supports Emergency Solar Management, a remote switch Western Power can use in rare grid emergencies, or
Accepts a fixed 1.5kW export cap

What to ask your installer: whether they’re quoting you a system that supports Emergency Solar Management. For almost every Perth home, this is the right choice. You barely notice it running, and you get to install a much larger and more productive system. If an installer isn’t walking you through this option, they’re not on top of their own industry.

4. Perth heat and coastal salt are tougher on solar panels than most markets

From 1 May 2026, you can install up to 30kVA of inverter capacity (more than enough for any home), provided the system either:

Supports Emergency Solar Management, a remote switch Western Power can use in rare grid emergencies, or
Accepts a fixed 1.5kW export cap

5. Two companies handle your solar, not one

In most states, one retailer handles both your bill and your network connection. In Perth, those jobs are split:

From 1 May 2026, you can install up to 30kVA of inverter capacity (more than enough for any home), provided the system either:

Synergy: state owned retailer. Sends your bill, pays your feed-in credits, offers tariff plans like DEBS and Midday Saver. Almost every Perth home uses Synergy. Regional WA uses Horizon Power.
Western Power: separate state owned company. Owns the poles and wires. Decides whether you can connect solar, how much you can export, and what equipment is approved.

You can’t shop retailers the way you can in Sydney or Melbourne. Synergy is effectively your only option. A good installer handles both Synergy and Western Power approvals for you without you needing to think about it.

How much does a solar system cost in Perth?

Rough 2026 pricing, after the STC rebate, for a quality install:

- 6.6kW system: $4,200 to $6,800
- 10kW system: $8,000 to $11,000
- 13.3kW system: $11,500 to $15,000
- 10 kWh battery (after state and federal rebates): $8,000 to $12,000 on top

Prices well below these usually mean compromises on panel quality, inverter brand, workmanship, or all three. The cheapest Perth quote is almost never the best value over twenty years. The most expensive fixes we see are always on the cheapest installs.

What size solar system do you need in Perth?

Everything starts with your electricity usage.

Most Perth households use somewhere between 15 and 30 kilowatt-hours (kWh) per day, but that range is wide for a reason. A couple working full-time with gas hot water will look very different to a family with ducted air conditioning, a pool, and someone working from home.

To get an accurate picture, look at:

your total annual usage on your power bill
divide that by 365 to get a daily average

That daily number is far more useful than guessing or using national averages. From an installer’s point of view, this step is critical. Without it, any system recommendation is just educated guesswork.

A big change we’ve seen in Perth in recent years is that 6.6 kW has effectively become the minimum practical system size. Smaller systems are still possible, but they rarely make sense once more affordable installation costs, rising electricity prices, and future energy needs are taken into account.

For most family homes in Perth with gas cooking and a couple of split systems, that lands on 6.6kW to 12kW. Homes with ducted air conditioning, a pool, or an EV usually suit 12kW to 20kW.

Our standard advice: size for the next five years, not today. Planning a pool pump, a heat pump hot water system, or an EV charger? Put the bigger system up now. It costs about half as much per kilowatt to oversize on day one as it does to add panels in three years time.

“In Adelaide a battery used to be a long conversation about whether it made sense. In Perth, with the 3pm cliff and the state rebate stacked on top of the federal one, it’s close to a no brainer for anyone staying in their house more than five years.”

Reefe Eleftheriou, co-founder of The Solar Guide

What direction should my solar panels face in Perth?

Generic advice says face them north. That’s correct in most of Australia.

Perth is the exception because of the 3pm cliff. West facing panels generate more in the late afternoon, when your air con is running hardest and the feed-in rate is five times higher. You either save more by self-consuming that power, or earn more by exporting it.

Simple rule: if you have a clean north face, use it, but also consider splitting your array across west and east. It’s not just about which angle generates the most energy, it’s about which angle generates the energy when you need it most. On a typical Perth hip roof with multiple faces, we’ll often recommend a west-heavy split rather than loading everything on the north face.

What are the best solar panels for Perth homes?

Perth is one of the sunniest capital cities on the planet, which means your panels will be working hard — and they need to hold up in serious heat over many years. The good news is that more sun means a faster return on your investment, so it’s worth getting the panel choice right.

For most Perth homeowners, Trina Solar, Canadian Solar, Suntech, or Aiko cover the range of what we’d recommend. Trina is one of the most established brands in Australia and has a strong track record performing well in the kind of extended heat Perth dishes out regularly. Canadian Solar is hard to beat on durability and value, and they’re one of the few affordable Tier 1 brands that also offer 30-year performance warranties. Suntech is worth serious consideration in Perth given the climate: their bifacial, dual-glass panels are rated significantly stronger than many standard options and handle both heat and storm conditions well. Aiko is a step-up panel that performs closer to premium territory without the premium price, with a temperature coefficient that means less output loss on 40°C-plus days.

For homeowners who want the best panel available and have limited roof space to work with, REC Alpha Pure panels are the top pick at the premium end. High efficiency, strong heat performance, and a 25-year product, performance, and labour warranty when installed by a certified REC installer.

For a detailed breakdown of each brand and what to ask your installer, read our complete guide to the best solar panels for Australian homes.

Is a solar battery worth it in Perth?

For most Perth homes, the answer in 2026 is yes. A solar battery in Perth now stacks up better than almost anywhere else in the country, and the reason comes back to one number: the gap between what Synergy pays you for exported solar (2 cents per kWh before 3pm, 10 cents per kWh between 3pm and 9pm) and what they charge you to buy power back in the evening (32 to 45 cents per kWh). A battery captures that gap. Every kilowatt-hour you store and use yourself after sundown is worth three to twenty times more than the same kilowatt-hour exported during the day.

In plain terms: your solar battery doesn’t ‘make’ you money the way panels do. It saves you money by stopping you from selling cheap and buying expensive. Perth’s 3pm feed-in cliff makes that gap wider here than anywhere else in Australia, and once you frame it that way the case for adding a solar battery in Perth gets a lot clearer.

For a typical 10 kWh battery, payback now sits around 5 to 6 years, well inside the 10 year warranty most quality batteries carry. For most homes with existing or planned solar panels for your home in Perth, adding a battery is the single biggest move you can make on your power bill.

For our current top-rated battery brands, see our guide to the best home batteries in Australia.

Is there a battery rebate available in Perth?

Yes, and it’s the most generous combination available in Australia right now. Perth homeowners can stack two separate rebates on a new solar battery installation.

The federal Cheaper Home Batteries Program takes around $3,300 off a typical 10 kWh battery (roughly $330 per kWh of usable capacity, stepping down on 1 May 2026 and phasing out entirely on 1 January 2031). On top of that, the WA Residential Battery Scheme adds another $130 per kWh: capped at $1,300 for Synergy customers in metro Perth and up to $3,800 for Horizon Power customers in regional WA. Both rebates are applied at the point of sale by your installer, so there’s no paperwork or claim form for you to chase.

To qualify for the WA state rebate, you need to enrol your battery in a Virtual Power Plant. Think of that as renting your battery out to Synergy occasionally. On rare grid-stress days, Synergy draws a small amount of power from your battery to stabilise supply. In exchange, they pay you $130 to $350 per year ongoing. You barely notice it running. Whichever solar battery you choose, confirm it’s VPP-ready before signing the quote. A battery that can’t join a VPP can’t claim the state rebate, which is around $1,300 you’ve walked away from for no reason.

What is the best solar battery for Perth homes?

The right battery depends on what you need it to do. Here’s how the market breaks down.

Premium: for whole-home backup, EV integration, or a system you want to grow. Sigenergy is the standout, designed as a whole-home energy management platform rather than simple storage. Tesla Powerwall is the other name here, polished and reliable, though a more closed ecosystem.

Mid-premium: This is the category most Hobart homeowners will land in. Brands like BYD, Sungrow, Enphase, and Sonnen all sit here. They’re well-supported in Australia, built to a good standard, and backed by companies that have shown a genuine long-term commitment to the local market. For a homeowner whose main goal is to stop selling cheap solar and buying expensive evening power, any of these will do the job reliably.

Value tier: GoodWe and Alpha ESS. Both are standout products for a great price. GoodWe particularly recently launched their ESA model that is stackable like SigEnergy. Whilst it does not contain all the bells and whistle of SigEnergy it is a solid performer at a great price point.

An important note: There are a stack of budget brand batteries on the market. But a solar battery depends on software updates, warranty support, and a local team to back it up. If the company behind it exits the Australian market, the battery effectively becomes obsolete regardless of how well the hardware works. This is the most important filter to apply before anything else, and it’s one of the reasons we don’t recommend budget brands that haven’t yet demonstrated long-term commitment to Australia.

For the full breakdown, see our complete guide to the best home batteries in Australia.

How do you find the best solar panel installer in Perth?

A solar system that lasts 15 years takes two things: quality products and a quality installer. Cheap quotes usually cut one or both, and the cuts don’t show up on day one.

Solar in Australia has a cowboys problem, and Perth is no exception.

This is why we only feature local installers. A genuine local Perth solar panel installer knows Western Power’s connection rules, knows how to set up Emergency Solar Management correctly under the May 2026 grid changes, knows which panels and inverters hold up through a real Perth summer, knows your suburb’s quirks (whether that’s a salt-laden coastal site or a tree-shaded inner-suburb roof), and designs systems around how your home actually uses power rather than maximising the size of the sale. They’ll also still be picking up the phone in year seven if something needs attention.

We’ve been called out to assess systems where the panels and inverter looked fine on paper, but the original solar panel installation in Perth was clearly optimised for the sale rather than the home. Cables undersized. Inverters mounted in full afternoon sun. Roof penetrations sealed with the wrong sealant. None of it visible from the ground until something failed.

What to look for:

Local experience in Perth.
Current SAA accreditation (formerly Clean Energy Council) on the person actually on your roof. This is the basic requirement every solar installer is supposed to have. It’s also better to have an SAA accredited installer designing and selling your system, not just installing it. Many companies use salespeople, which can cause issues on installation day if the salesperson didn’t pick something up. If you’re going through a salesperson, make sure an onsite inspection is carried out before installation day.
They listen to your current and future needs and design a system around them, rather than trying to sell you a package or something off the shelf.
They have specific brand recommendations with reasons, rather than whatever is on special this month.
Full documentation (compliance certificates, serial numbers, monitoring logins) handed over automatically after the install.
Be wary of larger national companies. They tend to use subcontractors they don’t have a personal relationship with for quick installs. Some local installers do use subcontractors too, but those subbies should be vetted and trained by the company you’re working with.

See our top 3 solar installers in Perth.

This is exactly why we built this directory.

Rather than giving you a list of 10 companies or selling your contact details to whoever pays for leads, we’ve done the research and kept it to three installers who know Perth, have a track record of quality work, use products that have proven themselves in local conditions, and focus on proper system design over quick turnarounds.

No spam. No sales calls chasing you down. Just three solid options, with their details available so you can reach out on your own terms.

Frequently asked questions about Perth solar

How much does a 6.6kW solar system cost in Perth in 2026?

$4,200 to $6,800 after the STC rebate for a quality install. Prices below about $4,000 usually mean compromises on panels, inverter, workmanship, or all three.

What is the best solar feed-in tariff in Perth?

All Synergy customers receive DEBS: 2 cents per kWh for exports before 3pm and 10 cents per kWh for exports between 3pm and 9pm. There is no higher residential feed-in tariff available.

Are solar batteries for a house in Perth worth it?

For most Perth homes with existing or planned solar, yes. With the WA Residential Battery Scheme, the federal Cheaper Home Battery Program, Midday Saver tariff and VPP income, typical payback on a solar battery in Perth is now 5 to 6 years, well inside the 10 year warranty most quality batteries carry.

What size solar system do I need in Perth?

Divide your average daily kWh usage by 5.3 for a minimum system size in kilowatts. Most family homes land on 6.6kW to 12kW. Homes with ducted air con, pools, or EVs usually suit 12kW to 20kW. Size for the next five years, not today, especially if you’re planning an EV, heat pump hot water or a pool pump.

Do I need north facing panels in Perth?

Not necessarily. North is still the best single orientation for total output, but a west bias usually produces more financial value, because it shifts generation into the 10 cent feed-in window after 3pm.

What’s changing on 1 May 2026?

From 1 May 2026, Perth homes can install up to 30kVA of inverter capacity, provided the system supports Emergency Solar Management (a remote switch Western Power uses in rare grid emergencies) or accepts a fixed 1.5kW export cap.

Can I install solar on a Colorbond roof in Perth?

Yes, and most Perth roofs are either Colorbond or tile. Colorbond is actually easier to install on than tile, provided the installer uses correctly sealed stainless screws at the right angle and cable glands at every penetration. Poor Colorbond installs are one of the most common callouts we see.

Is solar still worth it as the STC rebate reduces each year?

If you’ve read this far, you’re already better informed than most Perth homeowners who sign a solar contract. Pick up to three local installers from our directory, contact whichever feel right, and make the call on your own timeline.

What are the best solar panels for Perth homes?

Perth gets more sun than almost anywhere else in Australia, which means panels work harder for longer and heat tolerance is one of the most important things to look for. For most homes, Trina Solar, Canadian Solar, Suntech, and Aiko are the brands worth considering. Trina is one of the most established names in Australia with a strong track record in heat. Canadian Solar offers excellent durability and value, backed by 30-year performance warranties. Suntech’s bifacial dual-glass construction is noticeably stronger than most standard panels and holds up well in both heat and storm conditions. Aiko is the step-up option, with temperature performance that keeps output strong on Perth’s hottest days without the full premium price tag. For homeowners with limited roof space or who simply want the best available, REC Alpha Pure panels are the top pick at the premium end. For a full comparison, see our guide to the best solar panels for Australian homes.

What is the best solar battery for Perth homes?

The right battery depends on what you need it to do. Here’s how the market breaks down.

For the full breakdown, see our complete guide to the best home batteries in Australia.