Home battery sizing: how many kilowatt hours do you actually need?
Bigger is not better. The right battery is the one that fills on most days and empties on most nights.
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Battery Storage
A home battery moves solar power from noon into the evening and night. Size it too small and it is full by ten in the morning; size it too large and it never empties in winter. Here is how to get it right.
about 1 kWhusable capacity per 1,000 kWh of annual consumption, a common rule of thumb
6,000+full cycles in many LFP warranties, often over 10 years
85 to 92 %typical round-trip efficiency of a complete system
Guides in Battery Storage
LFP, NMC and sodium-ion: home battery chemistry explained
The chemistry inside the cabinet decides how long a battery lasts, how it behaves in heat and cold, and how much you should worry about it.
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