13kW Solar System: Price, Output and Battery Options
For big power users, larger families, electric vehicles and three-phase homes. See the price with and without a battery, then get a free Energy Assessment.
From $10,990Estimate13.32kW installed, incl. GST and federal rebate
Rated 4.3 from 288 Google reviewsLocal consultants and crewsFree Energy Assessment
“Before installing solar, my electricity bills were through the roof ... around $1,500 per quarter. Since having the system installed, my bills have dropped to almost the minimum charge”Damien C., Emerald, 13.3kW solar with battery · Google review
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Tell us a little about your home. A local consultant will call to talk through your bill, then visit if it suits.
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What you get
What a 13kW system gives you
A 13kW system is built to cover a big bill: large homes, ducted air con, pools, workshops and electric vehicles, with plenty left to charge a large battery.
47 to 59kWhAverage output a day, depending on where you live (Clean Energy Council figures)
30 to 36 panelsAbout 60m² of usable roof
Often three-phaseWe check your connection and export limits
From $10,990 Estimate13.32kW installed, after the federal rebate
Sized to wipe out a big bill
Larger systems are about covering more of your use, including the evening once you add a battery. Our consultants will show you the trade-off between a smaller system for the fastest payback and a larger one that covers more of the bill.
Darrian explained in detail the options and what it meant in financial terms, whether to go smaller and reduce the bill to get the best payback or go a larger system to wipe out the bill altogether.
David T. ★★★★★13.2kW system · Google review
Pricing estimates
13kW solar system price
Every price here is an estimate to help you compare. Your free Energy Assessment gives you a written quote for your home before you decide anything.
Build your system
Pick what you're after and the size of your home
See a starting system, an estimated price and what it could save you. Your free Energy Assessment then designs it properly around your power bill and your roof.
What's included
Free. A call first, then a home visit if it suits.
EstimatePrices are conservative starting estimates for installs in 2026. They include GST and the federal solar and battery discounts, and are not a quote. Battery discounts change over time. Your quote may include extras such as switchboard upgrades, racking for tricky roofs, a new or upgraded inverter, optimisers for shading, blackout backup wiring or three-phase work. Your price is confirmed after your free Energy Assessment.
Estimates include GST and the federal solar rebate (STCs) and, with a battery, the federal Cheaper Home Batteries discount, for installs in 2026. Your written quote can change with your roof, switchboard, inverter choice, battery brand, backup wiring or three-phase power. Average output uses Clean Energy Council figures of 3.5 to 4.4kWh per kW a day.
Battery or no battery
When to consider a battery with 13kW solar
Solar makes power in the day. A battery stores what you don’t use so you can run the house at night instead of buying power back from the grid.
A battery is worth a look if
Most of your power is used after dark: cooking, air con, TV and hot water in the evening.
Your feed-in tariff is low. In regional Queensland the regulated rate is 6.006c per kWh from 1 July 2026 (Queensland Competition Authority), and buying power back at night costs several times that.
You want backup in an outage. This needs a backup-capable inverter and wiring, and what stays on depends on the equipment.
You want the federal battery rebate before it steps down on 1 January 2027.
It may not pay yet if
Someone is home using power through the day, so most of your solar is already used as it’s made.
Your bill is already small after solar.
Your roof can’t fit enough panels to fill the battery in winter.
Adding a battery does not make a home off-grid. Off-grid needs a larger system designed for it.
25kWhBattery size we pair with 13.32kW of panels
$25,990 Estimate13.32kW solar with a 25kWh battery
$16,990 EstimateAdd a 25kWh battery to solar you already have
Nexus Solar was not the cheapest option, but Peace of Mind during the process with Troy and the Professional Service and Product proved well worth it, especially the Back-Up.
Judi S. ★★★★★Solar with battery backup · Google review
... it has minimized my power bill by more then half ... Would say a battery would be great help due to using more power at night when people are home
Auzzie W. ★★★★★Solar customer · Google review
... we are very impressed that we have now ordered a battery as well to add to our solar set up ... Special thanks for being able to work in regional areas of WA as well.
Sean G. ★★★★★Regional Western Australia · Google review
Real Nexa installs
Systems over 10kW we’ve installed
Real jobs by our crews, with the town, street and system size. No stock photos.
Emerald QLDSelma Rd · 13.2kW solarHealy, Mount Isa QLDHart Cr · 13.3kW solarGracemere, Rockhampton QLDGoodwin Rd · 13.3kW solarLongreach QLDWonga St · 13.3kW solarRural View, Mackay QLDMorgan Ct · 13.28kW solarGilgandra NSWNewell Hwy · 13.2kW solarNorwood, Launceston TASBettina Av · 13.32kW solarWarwick QLDSchoch St · 10.79kW solar
I got a 13.2 kW system, it’s been in for a week and i have already seen it produce in excess of this. Warranted output based on panels and daylight hours was approx 57 kWh per day, I’m seeing between 70 and 90 in actual operation.
David T. ★★★★★13.2kW system, first week · Google review
Before installing solar, my electricity bills were through the roof ... around $1,500 per quarter. Since having the system installed, my bills have dropped to almost the minimum charge
Damien C. ★★★★★Emerald, 13.3kW solar with battery · Google review
How it works
Free Energy Assessment, then a written quote
We come to you. No pressure, no obligation.
A quick call
We look at your power bill, how you use power and any solar you already have.
A home visit if it suits
A local consultant checks your roof, shading and switchboard.
Your tailored recommendation
The right size for your bill, with or without a battery, and a written quote.
Install, usually in a day
Our crew installs, tests and sets up the monitoring app with you.
Fast service from enquiry to quote and sales to fitting within 2 weeks.
Robyn K. ★★★★★Google review
It was only about 2 weeks from the 1st phone call to the panels being put onto the house, very quick and easy process. I should have done it years ago.
Caterina M. ★★★★★Google review
... the team and Nexa worked with us and we had our Solar up in running 1 week from our initial appointment.
Danielle S. ★★★★★Google review
What Nexa customers say
Rated 4.3 from 288 Google reviews. Every review below is a real Google review.
Tonia Kleinhans
Next employees were both knowledgable and highly professional. They arrived on time and completed all work on schedule.
damien cook
I had a 13.3kW solar system with a 32kW GoodWe battery installed in Emerald a few years ago, and I’ve been extremely happy with the results. I was born in Mount Isa and later moved to Emerald, so I understand how important it is to have a reliable and efficient energy setup in regional Queensland. Before installing solar, my electricity bills were through the roof — around $1,500 per quarter. Since having the system installed, my bills have dropped to almost the minimum charge, which has made a huge difference. From the initial consultation through to installation, everything was handled professionally, efficiently and with great attention to detail. The team were knowledgeable, friendly and easy to deal with, and the workmanship was excellent. A great investment, a great result, and one of the best decisions I’ve made for my home. I’d happily recommend this company to anyone considering solar and battery storage.
suzie
We recently had our solar system installed by Nexa Solar at our home and couldn't be happier with the experience. The whole team was highly professional, friendly and easy to deal with from start to finish. The installation was very neat and everything was explained clearly. Great communication and excellent service throughout. Would definitely recommend Nexa Solar to anyone considering solar.
Susanne Pritchard
I would recommend this firm to anyone. They made getting my Solar Battery so easy. Mike was very in-depth with his knowledge of Solar. Kelly from the office couldn't have been more helpful and the installers guided is through how to use it. We are very happy with Nexa Solar
Helen Murdoch
Very happy with the recent installation of both panels & battery. Ellie was great organising the actual installation and nothing was ever too much trouble. The actual Install team were terrific. Once again nothing was too much trouble and he answered all my questions and showed me the app. Thank you. Regards Helen Murdoch
Harry Blackman
The tradies that installed my system they were respectful and polite. On completion they left the site clean and tidy. They worked like trohans all day.
Robyn Kildey
Fast service from enquiry to quote and sales to fitting within 2 weeks. Very knowledgeable both fitters and sales. Price even with rebate was a lot but good quality can't be cheap and great customer support, constant phone calls with updates and fitting times and even refund for panels they couldn't fit. Eventually it will pay for itself so I'm happy
Justin Thursby
Nexa Solar are the only way to go. Friendly staff. Best equipment. Value for money and no ongoing hidden costs
tom Walton
Very happy with the install, very fast and friendly service.
David Greentree
Great communication, very friendly and answered questions in a way that didn't confuse us. Product is working exceptionally well
Rosemary jenkinson
Great work by the Nexa Solar team. My solar panels were installed promptly and on time, and the support team is readily accessible for team. Thanks again.
Ben Greaves
Great customer service and staff.
Areas we service
Local consultants and crews across four states
Regional Queensland is home, and we install across New South Wales, Western Australia and Tasmania too. Outside these towns? We can often help with a phone consultation.
Tony explained how solar works and best ways to maximise usage during our face-to-face meeting.
Jodie M. ★★★★★Coffs Harbour, NSW · Google review
Good communication, no fuss process.. Installers were ahead of schedule, super quick and friendly.. No complaints.. Very easy short process even living rurally.
Julie P. ★★★★Rural customer · Google review
I have not owed any money only hade credits from Ergon since it was activated by Ergon
Peter F. ★★★★★Regional Queensland · Google review
Rebates step down on 1 January 2027
The federal solar rebate drops by about a fifth and the battery rebate by about 16% from 1 January 2027. Your install date is what counts, not the date you sign.
Our estimate starts from $10,990 Estimate for a 13.32kW system, including GST and the federal solar rebate (STCs), on a standard install. Three-phase work, a switchboard upgrade, tilt frames or a complex roof add to it. Your Energy Assessment gives you a written quote first.
How much is a 13kW solar system with a battery?
13.32kW of solar with a 25kWh battery is estimated from $25,990 Estimate, including the federal solar and battery rebates. With a home EV charger, from $27,490 Estimate.
How many panels are in a 13kW system?
Usually 30 to 36. Our 13.32kW package comes to 36 panels at 370W; with 440W panels it’s about 30. Plan on roughly 60m² of usable roof.
How much power does a 13kW system produce?
Averaged over a year, roughly 47 to 59kWh a day. The Clean Energy Council puts average daily output at 3.5kWh per kW installed in Hobart, 4.2 in Brisbane and Cairns and 4.4 in Perth. Sunny days can be well above average.
Do I need three-phase power for a 13kW system?
Not always, but it helps. 13kW of panels needs a larger inverter, and on single-phase power networks limit inverter size and exports, with rules that vary by area. Many 13kW systems go on three-phase homes. We check what your network allows in the Energy Assessment.
What size battery suits a 13kW system?
Around 25kWh is a common match, because 13kW of panels has the spare daytime power to fill it. Adding a battery does not make a home off-grid; going off-grid needs a system designed for it.
Is 13kW worth it over 10kW?
It can be if your bill is high, you run air con for long hours, have a pool or an EV, or want a large battery. If not, a 10kW system may give a faster payback. Our consultants walk you through both.
How much does a 13kW system cost per kW?
Our 13.32kW estimate works out at about $825 per kW installed, after the federal rebate, similar to our other sizes.
What rebates apply to a 13kW system?
The federal solar rebate (STCs) is already taken off our estimates. Batteries also get the federal Cheaper Home Batteries discount. Both step down on 1 January 2027 and the install date is what counts. Check what you can claim.
Will a 13kW system keep my power on in a blackout?
Not on its own. Grid-connected solar switches off in an outage so line workers stay safe. For backup you need a battery with a backup-capable inverter and the right wiring, and what stays on depends on that equipment.
Can a 13kW system take my home off-grid?
Not on its own, and adding a battery doesn’t make a home off-grid either. Going fully off-grid needs a system designed for it, with more storage and usually a generator. Talk to us about batteries and off-grid.
How long does installation take?
Most home installs are done in a day. Several of our customers were installed within one to three weeks of their first call. Network approval times vary by area, and we handle the paperwork with your network for you.
Do you install in my area?
We have local consultants and crews across regional Queensland and in New South Wales, Western Australia and Tasmania, and we can often help other areas with a phone consultation. See every area we service.
What is the free Energy Assessment?
It starts with a call to go through your power bill and any existing solar. If it suits, a local consultant visits to check your roof, shading and switchboard. You get a tailored recommendation and a written quote, with no obligation.
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