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Understanding warranty terms could save you thousands. Here's what matters for WA homeowners.
Good
10-15 years product warranty
Avoid
5 years or less
Batteries are designed to last 10-15 years. Shorter warranties suggest lower confidence in product longevity.
Good
70-80% capacity retention at warranty end
Avoid
No performance guarantee or <60%
Guarantees the battery will still be useful at end of warranty period, not just functional.
Good
Unlimited or >15 MWh total throughput
Avoid
Limited cycles or <10 MWh
Ensures you can actually use the battery without voiding warranty through normal cycling.
Good
Australian service network with parts stock
Avoid
Overseas-only support, no local parts
Quick claims processing and repairs. Some brands have left AU market, stranding customers.
Strong track record, direct manufacturer support
Good AU presence, responsive claims
Longest warranty in industry
Strong AU market presence
Most installers handle warranty claims on your behalf. They have existing relationships with manufacturers and can expedite the process.
Take photos, export monitoring data, and document when the issue started. Include error codes from the battery management system.
You'll need your original invoice, installation certificate, and warranty registration confirmation.
Claims can take 2-8 weeks. Keep records of all communications and follow up weekly if you haven't received updates.
Incorrect Installation
Must be installed by CEC-accredited installer following manufacturer specs
Environmental Damage
Flooding, lightning strikes, or extreme conditions beyond rated specifications
Unauthorized Modifications
Firmware hacks, physical modifications, or non-approved integrations
Normal Degradation Beyond Guarantee
If battery degrades to 65% at 8 years and warranty guarantees 70% at 10 years, you may have limited recourse
We only connect you with CEC-accredited installers who stock batteries with strong warranty support and established Australian track records. No obligation, free quotes.