Solar & battery · Noosa to Caloundra

Solar and battery, done properly.

Starting from scratch? Panels, hybrid inverter and storage fitted together in one visit, with both rebates already off. It is the fastest payback we quote — and on a free-power plan it is under four years for most homes.

Already have panels? We retrofit a battery alongside them. It takes longer to pay for itself than doing the lot at once, and we will show you the difference rather than talk around it.

Solar + battery from $15,850
Battery retrofit from $9,850
$251.60/kWh rebate, first 14 kWh

Running a business? Commercial solar is sized to your daytime load, not your evenings →

Why doing the lot at once pays quickest

Dead simple

One visit, one inverter, one application

Fitting the panels and the battery together means one hybrid inverter instead of a string inverter you replace later, one trip, and one lot of paperwork. That is why doing the lot at once comes back in about four years while a retrofit takes seven to nine.

A number before anyone visits

Four photos from your phone — switchboard, meter, inverter, roof — plus your last bill. That is enough for an indicative price that afternoon, or next morning if it lands late. We come and look before it becomes a firm one.

Already have panels? Still worth doing

A battery goes in alongside the system you already own. It costs less up front than starting over — it just takes longer to pay for itself, and we show you both numbers rather than only the flattering one.

Rebate comes off the top

$251.60 per kWh on the first 14 kWh until 31 December 2026. We claim it — you never pay it and wait.

How it runs

Three steps, no showroom

01
Send four photos and a bill
Switchboard, meter, inverter, roof. An indicative price back that afternoon, or next morning if it is late in the day.
02
We come and look
Every place is different. We check the board, the roof and the run before we commit to a number.
03
Firm price, named week
Fixed quote with the rebate already off. Accept it and we book you in. One day on site.

Both ways in

Starting from scratch, or adding to what you have

Doing the lot at once is the quickest payback we quote — one visit, one inverter, one application. Retrofitting onto panels you already own costs less up front but takes longer to come back.

$7,622 off

No solar yet

Solar and battery together

Panels, hybrid inverter and storage, fitted and commissioned in one visit.

13–13.2 kW solar + 20.4 kWh battery

~~$30,172~~ − $7,622 rebates

$22,550

2-day install · or about $72/week interest-free

13–13.2 kW of panels — double what most installers quote at this price
20.4 kWh storage — 19.2 usable, whole-home backup
Rebates claimed by us and already off — you never pay them and wait

Smaller option — 6.6 kW solar + 15.3 kWh battery $15,850

$6,700 more buys double the panels and another 5.1 kWh.

⏳ Rebate steps down 1 January 2027 — about $704 more to wait

Get this price in writing or size it yourself in 30 seconds →

You already have solar

Battery retrofit

Your panels are already paid for. We add storage alongside what you have.

All prices after the federal rebate — claimed by us and already off, same as the package.

10.2 kWh 9.6 usable $9,850 $32/wk
15.3 kWh 14.4 usable $12,050 $39/wk
20.4 kWh 19.2 usableMost fitted $14,250 $46/wk
30.6 kWh 28.8 usableBest for acreage $18,650 $60/wk
40.8 kWh 38.4 usable $23,050 $74/wk

Prices are after rebate, single phase. Three phase is quoted at the site visit — different inverter, different job.

Before you pick a size

What size actually suits you

A battery has two ceilings and both have to be open. Your roof has to make enough spare power to fill it, and the house has to use enough after dark to empty it. Miss either one and the extra modules sit there earning nothing.

Solar you already have	$400 a month	$600 a month	$800 a month	$1,000 a month
6.6 kW	15.3 kWh 9.1 yr payback	20.4 kWh 7.7 yr · free-power plan needed	15.3 kWh 7.9 yr · free-power plan needed	15.3 kWh 7.9 yr · free-power plan needed
10 kW	20.4 kWh 7.2 yr payback	20.4 kWh 7.4 yr payback	15.3 kWh 9.4 yr payback	20.4 kWh 7.5 yr · free-power plan needed
13.2 kW	20.4 kWh 7.2 yr payback	30.6 kWh 6.3 yr payback	30.6 kWh 6.6 yr payback	20.4 kWh 7.7 yr payback
20 kW	20.4 kWh 7.2 yr payback	30.6 kWh 6.3 yr payback	40.8 kWh 5.8 yr payback	40.8 kWh 5.8 yr payback

A 6.6 kW array tops out around 15–20 kWh — however big the bill gets. At $1,000 a month it still only wants 15.3 kWh, because the roof cannot make the surplus to fill anything larger. Fitting 40.8 kWh to that house is about $11,000 for nothing. It is the most expensive mistake on this page and we will not sell it to you.
Small array, big bill? You need the plan, not a bigger battery. The shaded cells do not pay back on an ordinary tariff at all — the roof has no surplus left to store. A free-power plan fixes exactly those, because the battery fills from the grid at no cost. That is the figure shown in those cells.
Shifting load and a battery do the same job, so don’t pay for both. Putting hot water and the pool on timers inside a free window avoids buying at 33c — which is what the battery was going to do. Do the timers first: they cost a fraction of a battery, and you may well need a smaller one afterwards.
These are a guide, not your quote. Every figure comes from our own calculator on an ordinary tariff. Put your numbers in, or we will do it in front of you at the site visit.

Standard retrofit

What the price covers, and what it doesn’t

Included

In every retrofit price

SolaX hybrid inverter and T51 battery modules, supplied and installed
Battery isolation, DC cabling and switchboard work at the existing board
Backup wired to an essential-circuits sub-board — fridge, lights, power, internet
Federal battery rebate claimed by us and already off the price you see
Energex application and grid connection lodged for you
Commissioning, and SolaX Cloud set up on your phone before we leave
Certificate of electrical safety on completion

Not included

What gets quoted separately

Three phase. These prices are single phase. A three-phase hybrid is different hardware and a different job.
Sheds, granny flats and outbuildings. Mains or a submain to a second building is its own quote — the last one was a 16 mm² three-phase run.
Whole-home backup. The price covers an essential-circuits board. Backing up the whole house means a bigger changeover and usually a new board.
Switchboard replacement, where the board is full, pre-1990, or has no room for the backup sub-board.
Long runs between the board, the inverter and wherever the battery has to sit.
A battery your solar can’t fill. If your array is too small to charge the size you’re pricing, we’ll tell you before you buy it — not after.

We look before we quote and tell you if any of these apply — never after.

Already been quoted a generator?

A generator sits there. A battery works every night.

Plenty of people on acreage weigh these against each other, and it is a fair question. Here is the comparison as honestly as we can put it, including the part where the generator wins.

	Three-phase standby generator	40.8 kWh battery
Installed	$8,000–$18,000	$23,050
Servicing and exercise runs	around $450 a year, forever	nothing
Fuel	about $143 a day, but only while it runs	nothing
Saves on your power bill	nothing	$3,950 a year
How long it runs	as long as you keep feeding it	about 2 days, or 4 on essentials
After ten years	roughly $20,000 spent	roughly $14,000 ahead

Where a generator genuinely wins: long outages. Ours runs about two days, four on essentials, then it needs sun. A generator runs as long as there is fuel in it. If you are on a spur line that drops for a week after a cyclone, nothing else will do the job.
The cost isn’t the diesel, it’s the keeping. It only burns fuel when it runs, which is not often. What it wants is a service every year, an exercise run every month, a starter battery and fuel that has not gone stale. The entire point of standby is that it fires on the one morning you need it — and that only happens if somebody has been looking after it.
You can see exactly what a battery is doing. We fit CT clamps on your mains, so the app shows what the house is drawing, what the roof is making and what is left in the battery, live. You will know more about your own power in the first week than most people learn in a decade. A generator tells you nothing until you flick it on.
Usually the honest answer is both. A battery sized to your roof for the daily earnings and the first couple of days, plus a generator changeover wired in for the rare long one. That comes to about $25,000 together and is still tens of thousands ahead of a generator on its own over ten years — because only one of the two ever pays you back.

The bit you’ll actually use

You’ll know where every kilowatt-hour goes

Every system we fit gets CT clamps on your mains and SolaXCloud set up on your phone before we leave. It is not a gimmick. It is how you find out what your house actually does, and how you check that the numbers on this page were true.

SolaXCloud live view: 6.45 kW from the roof, 2.40 kW going into the house, battery at 100% — Live, at a glance

SolaXCloud daily totals: 23.50 kWh produced, 10.20 kWh used, 1.70 exported, 0.10 kWh imported — A whole day, and what it cost

Live power flow. Panels, inverter, battery, grid and the house, refreshing every five minutes — or every ten seconds on the current dongle. You can watch the battery fill at lunchtime and empty at dinner.
What the house really draws, not what the inverter guesses. The CT clamps read your mains directly. Without them you only ever see what the roof made. With them you see the pool pump kick in, the oven, the aircon — and what each one costs you.
Day, month and year. The screen on the right is a real day on one of ours: 23.50 kWh made, 10.20 used in the house, 16.90 put away in the battery — and 0.10 kWh bought off the grid. Ten cents worth. That is what a right-sized system looks like, and it is why we publish the numbers.
On your wrist, if you want it. SolaXCloud does Apple Watch and home-screen widgets, so the day's figures are a glance rather than an app you have to open. Small thing, but it is the difference between checking it once and actually watching it.
Faults come to me as well. With your permission the system reports to my installer account. If something trips I can usually see what it is before I get in the ute, and often sort it without coming out at all.

A different job

If you want to trade power, we’d fit you a Sigenergy

On a wholesale plan your battery buys when the market is cheap and sells into the evening peak. The retailer automates that themselves — but only for batteries on their supported list, and SolaX is not on it. Sigenergy is. So if trading is what you are after, that is what we would quote you.

Where it actually works

Three phase changes what you can move. Single phase is capped at 5 kW of export. Over a three-hour evening that is about 15 kWh — most of a 40 kWh battery’s spare, so it still works. What it can’t do is chase a short price spike: thirty minutes at 5 kW is 2.5 kWh. Three phase lifts the ceiling to the full 20 kWh and lets you hit the spikes as well as the shoulder.
Under 30 kWh there is nothing to sell. A house using 18 kWh after dark leaves a 20.4 kWh battery with about 1.2 kWh spare — the membership fee eats that and you go backwards by roughly $158 a year. At 40.8 kWh you have 20 kWh idle every night, and that is the part worth selling. It is why the disappointed reports almost all come from small systems.
It refills for next to nothing. Queensland wholesale prices now routinely go negative late morning to early afternoon. Charging the battery back up costs close to zero, and occasionally less than zero.
You keep the blackout cover. 38.4 kWh usable is roughly two days for a normal household, or four on essentials. Set up properly, selling the surplus never touches the reserve you actually wanted the battery for.

Before you switch

Read the numbers carefully. Amber say their battery customers earn over $1,000 a year on top of normal savings. On our own figures, 20 kWh of spare capacity sold nightly is around $1,300 — about a year off the payback on a 40.8 kWh system. Treat that as upside, never as part of the payback. When SolarQuotes ran wholesale themselves for six months in South Australia — a far more volatile market than ours — they reported virtually no difference in their bills.
Wholesale cuts both ways. You buy at the spot price as well as sell at it. If your battery is flat when a spike lands, you buy through it. And when midday prices go negative you can be charged to export your own solar.
You can’t do both. A wholesale plan and a free-power plan are different products, so it is one or the other. Queensland also swings less than South Australia, which is where most of the impressive numbers come from.
Priced at the site visit. Sigenergy is not on our standard price list, so we quote it properly rather than guess at it — and we check your connection before anyone promises you anything about exporting.

What we fit

19.2 kWh, whole-home backup

Single phase is our standard fit. We run the same gear on our own house. Want a different brand? We also fit Deye, GoodWe and Sigenergy.

Hybrid inverter: SolaX X1-VAST-10K, single phase
Battery: 4 × SolaX HS51 — 19.2 kWh usable
Chemistry: LiFePO4
Backup: Whole of home (EPS)
Monitoring: CT clamp on the mains measuring net consumption — live solar production, what the house is using and battery charge %, in the SolaX app
Scalable to: 40.8 kWh is our usual fit — the system takes up to 66.5 kWh per tower, and three towers with a TCBox-70
Charge rate: 30 A on a single stack, 50 A with the 2-in-1 splitter
Also fitted: Deye, GoodWe, Sigenergy — on request
Datasheets: X1-VAST inverter · TSYS-HS51 battery — straight from SolaX