How big a battery your household needs, payback arithmetic with the numbers shown, retrofitting to existing solar, backup options and how to compare installer quotes.
A battery earns its keep by storing solar energy you would otherwise export for a few cents and using it in the evening instead of buying power at peak rates. Whether that adds up depends on your evening usage, your solar system's spare output, your tariff and feed-in rate, and the price you pay after the discount.
The guides in this section walk through the decision with illustrative numbers you can replace with your own: sizing from your interval data, a payback calculation step by step, adding a battery to an existing solar system, pricing a new solar-and-battery package, choosing between essential-circuit and whole-home backup, financing options, and a line-by-line method for comparing quotes.
Use the calculators alongside them. The discount estimator turns the STC factor into dollars for your battery size, the installed cost estimator gives a price range to test quotes against, and the payback calculator shows how long the net cost takes to recover. None of them replaces a site inspection by an accredited installer, who must size the system to your actual use.
Sizing, Worked Examples and Quote Checklists
How to add a home battery to an existing rooftop solar system in Australia — VPP-capable inverter rule, AC- vs DC-coupled options, export limits, old systems and quote questions.
Sizing, Worked Examples and Quote Checklists
Does a home battery work in a power outage? How backup works in Australia, essential-circuit vs whole-home options, power limits, sizing for outages and quote questions.
Sizing, Worked Examples and Quote Checklists
Compare home battery quotes in Australia on net price per usable kWh, itemised extras, the STC discount shown, warranties, payment terms and installer accreditation.
Sizing, Worked Examples and Quote Checklists
The ways to pay for a home battery in Australia — cash, green and home loans, interest-free retail finance, WA and ACT loans — with the total cost of each worked out.
Sizing, Worked Examples and Quote Checklists
A step-by-step battery payback calculation for an Australian home with illustrative numbers — net price after STCs, daily saving, losses, tariff changes and sensitivity tests.
Sizing, Worked Examples and Quote Checklists
Size a home battery in Australia from your smart-meter data — evening and overnight use, spare solar, power in kW, seasons — and why the 14 kWh discount tier matters.
Sizing, Worked Examples and Quote Checklists
A worked example pricing a new rooftop solar and home battery package in Australia with both solar and battery STCs, compared with solar alone, using illustrative numbers.
