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The best home battery in Australia, judged properly

“Best” lists are usually a sales catalogue wearing a lab coat. Here's ours, with the two disclosures that change how you should read it: we don't sell batteries, so no brand bought its position — and we're based in Perth, which turns out to be an advantage, because a battery that thrives through a 45°C West Australian summer has passed the hardest residential test this country offers.

Last updated: 2 September 2026

How we judge

Five things decide a battery you'll live with for fifteen years — none of them is the spec-sheet headline:

1. Rebate reality

National lists ignore that eligibility is state-by-state and, in WA, decided by the inverter pairing, not the badge. A battery that's “best” but locked out of your state's scheme isn't best for you.

2. Heat behaviour

LFP chemistry and a wide operating range aren't nice-to-haves north of the 35th parallel — they're the difference between rated output and thermal throttling on the days you need storage most.

3. Backup honesty

“Backup capable” spans everything from one circuit to whole-home with sub-second switchover. We say which.

4. The company behind the warranty

A 10-year warranty is an actuarial bet on the issuer. Manufacturing scale and bankability matter more than brochure adjectives.

5. Who can actually install and support it

Ecosystem lock-in, installer network depth, parts distribution — the quiet variables that decide year-nine ownership.

The shortlist

SungrowThe arithmetic winner — rebate-efficient value at scale, from a manufacturer with real staying power.BYDThe compatibility champion — its own Blade LFP cells, pairing across twenty-plus inverter brands.GoodWeThe honest budget pick — value with its eyes open.Tesla Powerwall 3Brilliant hardware and the category's benchmark backup — not WA-rebate-eligible, so price that in.SigenergyThe newcomer moving fastest — integration ahead of track record.

Each page above carries the current models, capacities and per-model eligibility, kept live from our catalogue — the verdicts here are the editorial layer; the numbers live where they can't go stale. For the Perth-specific ranked list, see the best solar batteries in Perth; for the full brand map, battery brands mapped.

The state-scheme footnote that outranks the ranking

Whatever tops a national list, your state's scheme can reorder it overnight. In WA, the scheme pays on usable capacity through approved inverters, and some integrated-inverter batteries — the Powerwall 3 among them — can never qualify. Our eligibility guide names them plainly. Check eligibility before you fall for a ranking. Ours included.

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