Home batteries · Brisbane
Your roof starts earning at six.
A battery decides what happens to that energy once the sun is off the roof. That is the whole question, and it is a sizing question before it is a brand question.
By eleven, you're exporting.
Through the middle of the day a rooftop array generally makes more than the house is using. Without somewhere to put it, the surplus goes to the grid at whatever your retailer pays for exports, which for most households is well below what they charge to buy it back.
A battery is simply storage for that gap. Everything else about the decision follows from how big your gap actually is.
Home
Running on the grid
Battery
Empty
Grid
Supplying the house
Overnight and before sunrise, everything the house uses comes off the grid.
Generation follows daylight. Brisbane sunset runs from about 5pm in June to 6:45pm in December, with no daylight saving, so by early evening the roof has stopped. The shaded hours are the part of the day a battery is bought to cover.
By six, you're buying it back.
Evening is when a house draws hardest, and by then the roof has little left to give. That overlap of high demand and low generation is the window a battery is bought to cover.
How much of that window you cover is the sizing conversation. It depends on your own load shape, what your roof actually produces, and whether the property is single or three phase.
EV charging
There's already a battery in your garage.
An electric car is a large battery that happens to have wheels. Once one is parked at your place every night, charging stops being a fuel question and becomes a scheduling question: when it draws, and from what.
The charger you install is part of what decides how well that works. It is an electrical decision as much as a product one, covering circuit capacity, phase, switchboard position and the run to it.
EV chargingBefore you sign anything
What a battery quote should spell out.
Backup is a design choice
A battery does not automatically power the whole property during an outage. Backup depends on the selected inverter, battery, switching equipment and the circuits included in the design. Your written quote should identify what is backed up, the available power and any operating limits.
Federal battery discount
Eligible battery systems connected to new or existing solar may receive support under the federal Cheaper Home Batteries Program. Eligibility, approved-product status and discount value depend on the installation date, system design and current rules, so no fixed dollar amount applies.
Brands and system pathways
Some of the brands we work with include Sigenergy, GoodWe, Fronius, Sungrow, Tesla and Enphase. Exact models, compatibility, availability and current approved-product status are confirmed in the written quote. The right pathway may be a modular battery added to compatible solar, an integrated hybrid system, or a staged design that allows later expansion.
Warranty clarity
Manufacturer product warranties and installation workmanship are different. Warranty terms, registration requirements and exclusions are quote-specific. Australian Consumer Law rights apply in addition to manufacturer warranties.
Before we quote
Four things, and we can size it properly.
These are the inputs that change the answer:
- A recent electricity bill. It shows your real usage pattern, not an average of someone else's.
- Whether you already have solar, and roughly when it went on.
- Single phase or three phase. It is marked on the switchboard.
- Where the switchboard is, and what is between it and the garage.
What decides the design
- Existing solar and inverter compatibility
- Daytime generation and evening electricity use
- Switchboard and phase configuration
- Suitable battery location and clearances
- Essential circuits for any backup design
- Future EV charging or system expansion
Tell us about the job
Home batteries, solar and EV charging. Every quote is put in writing. Based at Coopers Plains.
ABJB Pty Ltd · QLD Electrical Contractor Licence 74825
Unit 6/49 Meadow Ave, Coopers Plains QLD 4108
Mon–Fri 7am–5pm · Sat–Sun closed
admin@beckaelectrical.com.au