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Residential Install

15.0kW Solar + 36.2kWh Battery in Ashgrove, Brisbane

Over $84,134 in lifetime savings for this Ashgrove home with a 15.0kW solar and 36.2kWh battery setup.

15.0kW
System Size
36.2kWh
Battery Storage

The Story

This Ashgrove household is looking at over $84,134 in lifetime savings. They needed a highly reliable setup to drop their growing electricity costs. Summer aircon bills in Brisbane can get out of hand. We designed a massive system to stop that.

We installed 15.0kW of new solar alongside a huge 36.2kWh Sigenergy battery setup. The roof gets plenty of subtropical sun to charge the batteries daily. They generate around 5,000 kWh annually to cover heavy household usage. Energex tariffs are not a problem anymore.

We secured over $6,000 in government rebates for this job. The system pays for itself in under six years. It is a big upfront investment but the long term return is absolutely worth it.

Installation Photos

The Solution

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

Inverter
Sigenergy 15.0kW
SigenStor EC 15.0TP (Sigenergy)
10yr warranty

Battery
4 x Sigenergy 9kWh
36.2kWh total storage
10yr warranty

System Performance

The system generates 5,000 kWh per year, with the battery storing excess daytime generation for evening and overnight use.

Monthly Generation (kWh/day)

56
Jan
49
Feb
44
Mar
37
Apr
28
May
26
Jun
30
Jul
38
Aug
47
Sep
49
Oct
54
Nov
57
Dec

Financial Impact

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

$84,134+
Estimated Lifetime Bill Savings (20 years)
$6,000+
Government Rebates Applied

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 $6,000.

Environmental Impact

13 tonnes
CO₂ reduced per year

2,371
Trees planted equivalent

289
Long-haul flights avoided

Frequently Asked Questions

Do I need a large battery for a 15kW solar system in Brisbane?
It depends on your overnight usage. A large system needs a large battery to capture all that excess daytime power. We fitted a 36.2kWh battery here to store enough energy for heavy summer aircon use.

Are solar rebates still available in Queensland?
Yes. We secured over $6,000 in government rebates for this Ashgrove installation. The exact amount depends on your system size and eligibility. We handle all the paperwork for you.

How long does a solar and battery system take to pay off?
This specific system will pay for itself in under six years. Most residential systems in Brisbane hit payback between four and seven years. It all comes down to your daily usage and system size.

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.