Perth Solar & Battery Specialists
Solar Batteries Perth
Positive Energy Solutions is Perth’s local solar and battery specialist, WA owned and operated. We are based in Osborne Park, where you can visit our showroom and meet the team. We handle the whole job, from design and supply to installation and aftercare.
SolarQuotes rates us Legendary, its highest tier for customer reviews. We were Perth’s number one rated solar company in 2023 and 2024, and a top-rated finalist in 2025. SunWiz has ranked us a top-3 battery company in WA by volume, two years running.
This page is your complete guide to adding a battery in Perth. Compare the leading battery brands, size the right system for your home, see real prices after the WA and Federal rebates, and estimate your savings.
When you are ready, request your quote and we will prepare a personalised proposal for you to consider, outlining your price and savings.
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Positive Energy
Solar Battery installs Perth
Perth homes are adding solar batteries at a record pace. Renewable energy keeps growing, and the solar battery rebates push demand higher.
Independent solar analyst SunWiz has ranked Positive Energy a top-3 solar battery installer by volume in WA for two years running. We reached that volume while staying focused on the premium end of the market.
Positive Energy are your local, premium solar and battery experts. We analyse your usage and match you to the right battery and technology for your home.
Have a question, or ready for your quote? Request Your Quote.
BENEFITS OF SOLAR BATTERIES
- Get more value from your solar — store your daytime surplus and use it yourself after the sun goes down.
- Build a bigger solar system — the battery captures the extra power those panels make during the day.
- Power your home day and night — solar covers the daytime, the battery covers the evening and overnight.
- Keep your home running in a blackout — back up the essentials like the fridge, lights and internet, or your whole home.
- Lower your power bills — your stored solar runs the home through the evening and overnight, so you buy less from the grid.
We size the right battery to your home and the way you use power. Our premium systems are built to last and matched to how you live. If you already have solar, we add a battery to it. If you are starting fresh, we install a complete solar-and-battery system with premium SunPower panels. Either way, we tailor it to your home.
SigEnergy SigenStor
One of our most-installed batteries in Perth. An all-in-one hybrid inverter and battery — single- or three-phase (5–30 kW), scalable in 9 kWh modules up to 54 kWh, with built-in DC EV charging (V2X).
Explore SigEnergy →Sungrow
2025 Installers' Choice "Best Battery". Modular DC-coupled storage — SBR to 25.6 kWh, SBH to 40 kWh — with whole-home backup on the 10 kW single-phase / 15 kW three-phase hybrid.
Explore Sungrow →BYD
Premium DC-coupled Battery-Box HVM, scalable from 11 to 22 kWh, paired with the award-winning Fronius GEN24 inverter for single- or three-phase homes.
Explore BYD →Tesla Powerwall 3
All-in-one 13.5 kWh with a built-in 10 kW inverter and whole-home backup (single-phase), expandable with 13.5 kWh packs. LFP chemistry, 10-year warranty.
Explore Tesla →Fronius Reserva
Austrian-engineered, slim DC-coupled storage, scalable from 6.5 to 15.8 kWh, paired with the 2025 Installers' Choice Fronius GEN24 inverter.
Explore Fronius →iStore
Australian-owned with WA-based support. Scalable from 5 to 30 kWh DC-coupled storage, with a fire extinguisher in every module and an optional backup box.
Explore iStore →Specifications per the Positive Energy Product Guide 2026; exact capacity, power and warranty are confirmed for your system in your quote. Every system carries our 10-year installation workmanship warranty.
A quick guide to the batteries we install in Perth. The right choice depends on your home, your power use and your budget — we will confirm the best fit in your quote.
| Battery | Typical capacity | Phases | Backup | Expandable | Best for |
|---|---|---|---|---|---|
| SigEnergy SigenStor | 9 kWh modules, to 54 kWh | Single & 3-phase | Yes | Yes — 9 kWh modules | Most homes — flexible, premium |
| Sungrow SBH / SBR | Up to 40 kWh | Single & 3-phase | Yes | Yes | Value & high capacity |
| BYD HVM | 11–22 kWh | Single & 3-phase | Yes | Yes | Premium, Fronius-paired |
| Tesla Powerwall 3 | 13.5 kWh, to ~54 kWh | Single-phase | Yes | Yes — 13.5 kWh packs | Simple all-in-one |
| Fronius Reserva | 6.5–15.8 kWh | Single & 3-phase | Yes | Yes | Fronius-paired |
| iStore | 5–30 kWh | Single & 3-phase | Yes | Yes | Smart value |
Capacities are typical per-home ranges; exact capacity, power and component warranties are confirmed for your system in your quote. Every Positive Energy system carries our 10-year installation workmanship warranty. Panels are SunPower.
How much could a solar and battery system save you in Perth?
An honest estimate based on real Perth installs and current rebates. Move the sliders to suit your home — your figures are detailed in your quote.
Three popular packages, sized for Perth homes
8.8 kW solar & 15 kWh battery
13.2 kW solar & 16 kWh battery
13.8 kW solar & 54 kWh battery
Every price already has your WA & Federal battery rebate deducted, plus solar STCs. See how the WA & Federal rebates work » · See full solar system prices »
Estimate for a north-facing Perth roof on the Synergy Home Plan (A1, $0.3237/kWh). 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 WA & Federal battery rebates plus solar STCs; tile or double-storey installs may add cost. Your final price and savings are detailed in your quote.
Three complete systems our Perth team installs most — premium SunPower solar paired with the modular SigEnergy battery, sized to how your home uses power. Every price is after WA & Federal rebates; we confirm your exact system in your quote.
9.2 kW solar & 27 kWh battery
11.5 kW solar & 36 kWh battery
13.8 kW solar & 54 kWh battery
Not sure which fits your home? Request Your Quote — we size every system to your roof, usage and phase.
Two government rebates can take thousands of dollars off a SigEnergy SigenStor battery in Perth, and you can claim both together. As a New Energy Tech Approved Seller (NETCC), we are authorised to claim them on your behalf. We make the whole process simple — here is how each rebate works.
1. WA Government rebate (Synergy)
Synergy customers can claim $130 per kWh of battery storage, capped at $1,300.
To qualify, you join a Virtual Power Plant (VPP): you let the grid use a small amount of your stored energy during peak demand, and you are paid for it. Synergy can do this up to 30 times a year (up to six hours each time), and you can opt out after two years.
A $10,000 no-interest loan is also available through the WA scheme to spread the upfront cost.
2. Federal Government rebate
The federal Cheaper Home Batteries Program cuts roughly 30% off the upfront price of your battery. The rebate is largest on the first portion of capacity and gets smaller as the battery grows, and it steps down every six months, so acting sooner means more savings. Use the slider to estimate yours.
As Perth’s #1-rated solar and battery team, we handle the rebate paperwork for you and make sure you claim every dollar you are entitled to.
Request Your QuoteEstimate only, based on a $38 STC price and May–Dec 2026 rates. Rebate amounts and rules can change, and your final savings depend on your home and system. We confirm the latest figures before you buy. Your battery must be installed after 1 July 2025 and meet the WA Residential Battery Scheme and Cheaper Home Batteries Program rules. Sources: WA Government (Energy Policy WA) and DCCEEW, 2026.
Two easy ways to see what solar & battery does to your Synergy bill — a quick estimate now, or your exact numbers from your real bill. Move at your own pace.
Get an instant estimate
Use the calculator above — move the sliders for your bill and how you use power, and see your system, savings and payback straight away.
Try the calculator ↑Get your exact numbers
Send us your latest Synergy bill. Our team reads it line by line and applies every WA & Federal rebate you are entitled to. Then we show you exactly what you would save — tailored to your home.
Send my bill & get my savings →From your bill to switched on
The right size depends on how your home uses power today and where it is heading — not a one-size box. Here is how our Perth experts get it right.
Match it to your usage
We look at your day-versus-night split. Solar covers what you use through the day; the battery earns its keep by shifting your evening and overnight use off the grid.
Perth sun does the heavy lifting
A north-facing Perth roof yields around 4.4 kWh per kW of panels a day, so we size the SunPower array to fill your battery and still cover your daytime use.
Size for the bill you have
Most Perth homes land on a 27 to 36 kWh battery. Bigger bills, ducted air-con, a pool or an EV push you higher — the calculator above shows where you sit.
Size up now, or expand later?
It depends on your home and how it is changing. The battery rebates are largely a one-off and step down over time, so there can be a real case to size up now and lock them in. The SigEnergy battery is also modular, so you can start smaller and add capacity later. We weigh that trade-off with you — factoring a growing family, a future EV or going all-electric — to land on the right call for your home.
See your numbers in the calculator above, or Request Your Quote and we will size it exactly to your roof, usage and phase.
Keep your existing panels to add storage and claim the rebates. Around one in four batteries we install is a retrofit to an existing solar system — premium storage added to the setup you already own.
We work with your existing system
Your options depend on your inverter and wiring. We can add a matching battery to your current hybrid, upgrade you to a DC-coupled hybrid package, or AC-couple a SigEnergy battery. AC-coupling suits almost any existing inverter.
We make sure it is compliant
Adding a battery triggers whole-of-site rules with Western Power and Synergy — export limits and the new flexible-export (CSIP-AUS) requirements. We check your inverter and your cabling against AS/NZS 4777, and handle the approvals.
You still get the rebates
Retrofits qualify for the WA and Federal battery rebates, the same as a new system — we confirm your exact eligibility and entitlement.
Send us your existing system details and we will tell you the best retrofit path and price — Request Your Quote.
Two ways to add a battery in Perth — both premium, both fully installed and supported by Positive Energy. Here is how they differ, and how we match the right one to your home.
DC-Coupled Batteries
A DC-coupled battery shares one hybrid inverter with your solar — the most efficient setup, and the usual choice for a new solar-and-battery system.
- ✓Single energy conversion for maximum efficiency
- ✓Lets you supersize the solar array for more total yield
- ✓Works on single-phase and three-phase
- ✓Strong battery backup and black-start capability
AC-Coupled Batteries
An AC-coupled battery brings its own inverter, so it pairs with the panels you already have — the flexible choice for a retrofit. SigEnergy is our main AC-couple option, and we also retrofit Tesla, Sungrow and iStore.
- ✓Works with almost any existing solar system
- ✓Flexible installation locations
- ✓Keeps your current panels in place
- ✓SigEnergy, Tesla, Sungrow or iStore retrofits
Battery Backup
When you choose a battery for backup, think about which appliances you want to keep running in an outage. We most often back up lights, fridges and freezers, and the NBN — and almost every battery handles that easily.
Larger loads need more thought. The inverter has to supply enough power, and the battery has to hold enough charge. A ducted air conditioner with a 32A startup, for example, will not run on a battery that outputs only 16A. And a 10 kWh battery powering a 4-5 kW load lasts only about two hours.
So choose what you back up carefully, and size the system to match — our consultants help you design it the right way. To back up large three-phase appliances, install a 15 kW inverter or larger. We recommend SigEnergy or Sungrow, or the Fronius Verto 30 kW for maximum capability.
Battery Black Start
Black start lets your system wake itself up after a grid outage. When the sun comes up, the panels restart the battery and power your backed-up circuits — no grid required.
Almost all DC-coupled batteries can black start, regardless of size. Not every battery offers the feature, so if black start matters to you, request your quote before you buy.
One caveat: a single-phase battery cannot black start a three-phase inverter, and it backs up only the appliances on its own phase.
A premium system deserves premium backing. Here is what protects your investment with Positive Energy — and how to judge a battery warranty when you compare.
Our warranty
Every Positive Energy system carries a 10-year installation workmanship warranty, on top of the manufacturer warranties on your battery, inverter and panels. We are your single point of contact and handle any manufacturer claim for you.
What makes a good battery warranty
Battery warranties vary. Look past the headline number at total throughput (the kWh guaranteed over its life), output retention (quality batteries guarantee 70 to 80% of capacity at 10 years), and how cycles are counted (full cycles, not partial). Sonnen, for example, is built for 10,000 full cycles — a useful benchmark when you compare.
Positive Energy Protection, Powered by Omnidian
A warranty is only as good as the team behind it. Every system includes Positive Energy Protection: our in-house service manager and engineers, backed by Omnidian — an award-winning after-sales partner (Global Cleantech 100, 2022–24) providing 24/7 monitoring, first-line support and a local Perth field-service team. Many issues are caught and fixed before you even notice.
Want the detail on what is covered? Request Your Quote and ask us about Positive Energy Protection.
FAQs
Frequently asked questions
There are many benefits of having a solar battery system on your home, lets explore some of the FAQs.
Positive Energy Solutions is rated 4.9 out of 5 from 417 Google reviews. Read all reviews on Google →
Reviews sourced from Google and shown with attribution. A live selection of recent reviews; ratings update over time. Snapshot 3 August 2026.
Ready to take control of your power bill?
From the right system design to install and ongoing support, Perth’s award-winning solar and battery team looks after every step. Request your quote today.