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Residential Install

11.4kW Solar + 24.2kWh Battery in Mount Ommaney, Brisbane

This Mount Ommaney home generates 133% of its annual electricity use with a new 11.4kW solar and 24.2kWh battery system.

The Story

This Mount Ommaney property now generates 133% of the energy it needs. We ripped out an old system and installed 11.4kW of fresh solar. We paired it with a massive 24.2kWh battery setup.

The owners bought the place six months ago. They are doing a lot of property upgrades. Getting their Energex bills sorted was a top priority. Summer aircon bills are brutal in Brisbane. Now they make 17,245 kWh of power every single year.

They claimed over $7,951.50 in government rebates upfront. The system pays for itself in under six years. Over the lifespan of the gear they are looking at $78,508 in total savings. That is serious money staying in their pocket.

“I was not even home when the boys finished the job. Really happy with the new solar and batteries. Sent Brett a message straight away to say thanks.”

BF
Brett Fisher
Director, Connect Energy

The client bought this house six months ago and started renovating. He asked us to strip out an old solar setup. We upgraded the roof with a modern system and added heavy battery storage. Mount Ommaney is just up the road from our Darra office. We always enjoy looking after locals in our own backyard.

The Solution

Connect Energy installed a complete solarand battery solution for this Mount Ommaney home, selecting premium equipment suited to the site’s generation profile.

Solar Panels
24 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 8kWh
24.2kWh total storage
10yr warranty

System Performance

The system generates 17,245 kWh per year, with the battery storing excess daytime generation for evening and overnight use. This covers 133% of the household’s annual energy consumption.

Monthly Generation (kWh/day)

57
Jan
55
Feb
51
Mar
44
Apr
34
May
33
Jun
33
Jul
38
Aug
49
Sep
52
Oct
57
Nov
63
Dec

Financial Impact

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

$78,508+
Estimated Lifetime Bill Savings (20 years)
$7,951.50+
Government Rebates Applied

133%
Annual Generation vs Household Use

Government incentives applied to this project included Small-scale Technology Certificates (STCs) and the Queensland Cheaper Home Batteries Program, which together reduced the upfront cost by over $7,951.50.

Environmental Impact

14 tonnes
CO₂ reduced per year

2,664
Trees planted equivalent

311
Long-haul flights avoided

Frequently Asked Questions

Can I replace an old solar system and add a battery?
Yes you absolutely can. We regularly remove outdated panels and install a completely fresh system with battery storage. This ensures all your gear communicates perfectly and handles Brisbane summer loads.

How much solar do I need to cover my aircon in summer?
It depends on your daily usage. A large 11.4kW system makes over 17,000 kWh a year. This easily covers heavy aircon use and charges a big battery for the evening.

Do solar rebates apply if I am upgrading an old system?
Yes they do. As long as you install approved new equipment you can still claim government rebates. This Mount Ommaney job received over $7,951.50 in upfront discounts.

Related Services

Interested in a similar setup for your own home or business? Explore our Solar Battery Storage and Solar Panel Installation service, 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.