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20.9kW Solar + 48.4kWh Battery in Wakerley, Brisbane

This Wakerley home will save over $186,411 with a massive new 20.9kW solar array and 48.4kWh battery system.

20.9kW
System Size
48.4kWh
Battery Storage
213%
Energy Self-Sufficiency
46
Panels

The Story

This Wakerley household now generates 213 percent of their own power. They produce roughly 32,014 kWh of electricity every year. That is enough to run the aircon all summer long.

Hail storms ruined their old roof and panels. We pulled the old gear down so the roofers could work. Then we came back to install a massive 20.9kW solar array. We used Longi panels and ran brand new cables.

We paired the new panels with a 48.4kWh battery setup. The whole system will pay for itself in under five years. They claimed over $22,230 in government rebates for this upgrade. Now they are looking at $186,411 in lifetime savings.

“Brett and the team go out of their way to fully explain the product and product performance in detail. They take pride in their work and delivery a very high end quality job. Topping it off with competitive pricing. You can’t go wrong using Brett and his team for your Solar panel, battery and gateway requirements.”

Verified Google review

BF
Brett Fisher
Director, Connect Energy

We started by installing a 48.4kWh Sigenergy setup with whole home backup. Recent hail storms wrecked the old roof and panels. We removed the old gear so the roof could be replaced. Once the roof was finished we returned to install 20.9kW of Longi panels. We ran all new cabling and connected the arrays to the new battery system.

Installation Photos

The Solution

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

Solar Panels
46 x LONGi 475W
LONGi Hi-MO X10 475W
25yr product / 30yr performance warranty

Inverter
Sigenergy 20.0kW
SigenStor EC 20.0TP (Sigenergy)
10yr warranty

Battery
6 x Sigenergy 8kWh
48.4kWh total storage
10yr warranty

System Performance

The system generates 32,014 kWh per year, with the battery storing excess daytime generation for evening and overnight use. This covers 213% of the household’s annual energy consumption.

Monthly Generation (kWh/day)

110
Jan
104
Feb
100
Mar
78
Apr
58
May
58
Jun
70
Jul
78
Aug
94
Sep
98
Oct
98
Nov
106
Dec

Financial Impact

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

$186,411+
Estimated Lifetime Bill Savings (20 years)
$22,230+
Government Rebates Applied

213%
Energy Self-Sufficiency

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 $22,230.

Environmental Impact

26 tonnes
CO₂ reduced per year

4,946
Trees planted equivalent

578
Long-haul flights avoided

Frequently Asked Questions

Can I upgrade my solar panels after a hail storm?
Yes you can. We often remove old damaged panels so your roofers can do their job. Then we come back and install brand new panels with modern cabling.

Will a home battery run my house during a blackout?
Yes it will if it is wired for whole home backup. A large system like this runs the house perfectly when the Energex grid fails.

How long does it take for a large solar system to pay off?
This Wakerley setup will pay for itself in under five years. Government rebates combined with massive power generation keep the payback period short.

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.