Batteries · Maintenance
Looking after a battery
Very little to do: keep it clear, within its temperature range and online. What the app should show, when capacity loss matters, and what a warranty actually needs from you.
Size your battery →4 answers · checked 24 September 2026
01
How long do home batteries last?
Most warranties promise a minimum share of the original capacity, not a like-new battery. Documents we read range from 60% (SigEnergy, Huawei,…
Read the answer →02Do home batteries work in the cold?
Lithium cells must not be charged hard when cold, so the battery management system slows or blocks charging. Tesla's Powerwall 3 limits charging…
Read the answer →03Does my battery need the internet?
Yes for basic operation: schedules, self-use and backup run on the inverter. What stops without internet is app monitoring, remote changes,…
Read the answer →04What should I set my backup reserve to?
The reserve is the charge kept back for power cuts; the battery stops normal daily discharge when it reaches it. Many owners use 10-20%, raising…
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