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19.95kW Solar + 45.2kWh Battery in Sherwood, Brisbane

This Sherwood family will save over $131,345 with a massive 19.95kW solar and 45.2kWh battery setup.

The Story

This Sherwood home is now generating 227% of its annual household electricity use. We installed a huge 19.95kW solar system. We paired it with a massive 45.2kWh battery bank. The family will save an estimated $131,345 over the life of the setup.

They have lived here for 15 years. Rising Energex rates and a growing family sent their bills through the roof. Running the summer aircon was getting too expensive. The owner did plenty of research before calling us. He wanted a custom setup with whole home backup.

We secured $11,543.50 in government rebates for the job. The system will generate 29,407 kWh every year. It will pay for itself in under seven years. They are completely sorted for heavy summer energy use.

The Solution

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

Solar Panels
42 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
5 x Sigenergy 9kWh
45.2kWh total storage
10yr warranty

System Performance

The system generates 29,407 kWh per year, with the battery storing excess daytime generation for evening and overnight use. This covers 227% of the household’s annual energy consumption.

Monthly Generation (kWh/day)

105
Jan
92
Feb
83
Mar
69
Apr
51
May
49
Jun
56
Jul
71
Aug
88
Sep
92
Oct
103
Nov
108
Dec

Financial Impact

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

$131,345+
Estimated Lifetime Bill Savings (20 years)
$11,543.50+
Government Rebates Applied

227%
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 $11,543.50.

Environmental Impact

24 tonnes
CO₂ reduced per year

4,543
Trees planted equivalent

533
Long-haul flights avoided

Frequently Asked Questions

Can a solar battery run my whole house during a blackout?
Yes it can. We install systems with whole home backup. This means your fridge and lights stay on when the Energex grid goes down. You just need a battery big enough to handle your load.

How much solar do I need for a 45kWh battery?
You need a very large solar array to charge a battery that size. We installed almost 20kW of panels for this Sherwood property. The subtropical Brisbane sun easily tops up the battery every day.

Are there government rebates for solar in Brisbane?
Yes. We claimed over $11,544 in government rebates for this Sherwood installation. The exact amount depends on the size of your new solar system. We handle all the paperwork for you.

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.