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12.3kW Solar + 27.1kWh Battery in Coopers Plains, Brisbane

This Coopers Plains home will save over $53,611 with a new 12.3kW solar and 27.1kWh battery system.

12.3kW
System Size
27.1kWh
Battery Storage
12
Panels

The Story

This Coopers Plains household is looking at more than $53,611 in lifetime savings. We installed a big 12.3kW solar setup. We paired it with a massive 27.1kWh battery. The system pays for itself in under six years.

The subtropical sun in Brisbane does the heavy lifting here. They will generate around 9,069 kWh every year. We also claimed over $7,012 in government rebates upfront. That brought the total cost right down.

The owners almost went with another installer. They cancelled when the communication dropped off. We stepped in and provided the exact same specs for thousands less. Now they have a massive system ready for summer aircon bills.

“We installed a 27.12kWh Sigenergy system and a 5.8 kW solar panel expansion to our existing array. The only word I can use to describe Connect Energy is perfect.

In summary, they’re prompt, responsive, knowledgeable, and respectful. Exceptional, really.

We were due to go with another provider when an issue arose, so I had to scramble to find alternatives. Brett, the owner, got in to see us before anyone else — literally 18 hours after I requested the visit, he was at our house. He even called to tell me he was going to be 3 minutes late because of the rail crossing!

When he arrived, he didn’t waste any time trying to sell me more than I wanted — he listened to what I was thinking, inspected the site, immediately decided a few things differently to our original contractor based on the environmental conditions (such as the fact that putting the gateway outside would put it in 6-9 hours of direct sunlight). In particular, he didn’t even blink when I mentioned I wanted the hot water system connected to the smart port — this was the sticking point with our previous contractor.

During the inspection, two other things really stood out to me:

First, they run almost two dozen solar panels on their office roof to test effectiveness. This told me I wasn’t dealing with a retailer — they were actually tradespeople in this space. (This has a second benefit: you’re not paying for a retailer and a contractor, you’re just going with a local tradesperson who does the lot).

Second, he showed me a photo of the entire team and a colleague they work with. They give second hand equipment (from solar panels upgrades, for example, which would otherwise be trashed) which still have use. He deploys them to communities in Africa, providing communities with power for water filtration and pumps and the like. That stuck with me more than the technical side of things — coordinating with someone to repurpose our waste to support entire communities elsewhere in the world is just a smart thing to do.

So, I was very pleased by this point. But I’d forgotten to ask about a surge protection device, since we didn’t have one. Our original contractor had simply nodded and gladly added it to our quote.

Brett didn’t — instead, he checked and advised that one was built into the gateway. He didn’t take the easy cash when he could have.

He’d come out on the Friday, and we had the quote on Saturday. I accepted the proposal within the hour! I had expected a comparable price to what I already had, maybe more since it was a local business.

They came in under. Better price + the work I wanted (actually, better panels and more of them) + a local, competent team + some corporate social responsibility? Yes please!

I’m happy to report that they did not disappoint.

When they came to install the system, the entire team was amazing — efficient, courteous, respectful to my elderly, non-English speaking parents. Brett was with the team all day working alongside them, much to my surprise. The install was done within about 6 hours from arrival, and he walked me through the app. We initially had some issues connecting to wifi, so he just threw in a cellular dongle even though it eventually worked.

The system works flawlessly, the house is self sustaining even on cloudy days. The only downside was how guilty I felt taking two weeks to write this review!

Connect Energy is worth more than the price they’ll quote you, frankly. I reached out to them initially because they’re a gold Sigen installer, and a well established company also (you know the horror stories about short-lived companies with appealing prices…)

So, if you need something? Go with them. This is the level of professionalism, expertise, and service you should expect and receive anywhere for anything. Truly brilliant.”

Verified Google review
BF
Brett Fisher
Director, Connect Energy

The client originally signed a contract with another Sigenergy provider. He cancelled the order because they stopped returning his calls. He came to us for a second quote. We supplied the exact same 12.3kW solar and 27.1kWh battery setup. Our final price was thousands of dollars cheaper than his first quote.

Installation Photos

The Solution

Connect Energy installed a complete solar and battery solution for this Coopers Plains home, selecting premium equipment suited to the site’s generation profile.

Solar Panels
12 x LONGi 475W
LONGi Hi-MO X10 475W
25yr product / 30yr performance warranty
Inverter
Sigenergy 10.0kW
SigenStor EC 10.0SP (Sigenergy)
10yr warranty
Battery
3 x Sigenergy 9kWh
27.1kWh total storage
10yr warranty

System Performance

The system generates 9,069 kWh per year, with the battery storing excess daytime generation for evening and overnight use.

Monthly Generation (kWh/day)

62
Jan
54
Feb
50
Mar
42
Apr
32
May
32
Jun
36
Jul
45
Aug
54
Sep
54
Oct
60
Nov
63
Dec

Financial Impact

This system significantly reduces the household’s electricity costs, with savings that grow as energy prices rise.

$53,611+
Estimated Lifetime Bill Savings (20 years)
$7,012+
Government Rebates Applied

Government incentives applied to this project included Small-scale Technology Certificates (STCs) and the federal Cheaper Home Batteries Program, which together reduced the upfront cost by over $7,012.

Environmental Impact

14 tonnes
CO₂ reduced per year
2,749
Trees planted equivalent
311
Long-haul flights avoided

Frequently Asked Questions

How much solar do I need to charge a 27kWh battery?
You need a large solar array to fill a battery this big. We installed 12.3kW of panels on this Coopers Plains roof. That generates plenty of power to charge the battery and run the house.
Do government rebates apply to solar and battery packages in Brisbane?
Yes. We applied over $7,012 in government rebates for this exact installation. We handle all the rebate paperwork for you. The discount comes straight off your final invoice.
What happens if my solar installer stops returning my calls?
You can cancel your contract if they fail to deliver. This client walked away from another company for that exact reason. We took over the job and saved him thousands on the exact same gear.

Related Services

Interested in a similar setup for your own home? Explore our Solar Battery Storage and Residential Solar services, or browse more Brisbane solar & battery case studies.

Connect Energy delivers comprehensive residential, commercial, and industrial solar solutions across Brisbane. From custom installation to ongoing maintenance, we empower communities with reliable, sustainable power.