Enter your PV array size, sun hours and daily use — see the right battery capacity in kWh, your self-sufficiency %, and a recommended LiFePO4 model. No email required to use it.
Daily generation = array kW x sun hours, derated ~10% for system losses. Recommended capacity targets your evening/overnight load so the battery cycles daily. Figures are indicative; a tailored quote confirms exact sizing.
| Metric | Value |
|---|---|
| Daily solar generation | — |
| Usable solar energy | — |
| Self-sufficiency (solar + stored) | — |
| Excess exported to grid | — |
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A practical rule of thumb is 1–2 kWh of battery per kW of PV for self-consumption. A 5 kW array on a typical home pairs well with a 5–10 kWh battery; the exact size depends on your evening use and how much solar you want to capture instead of exporting.
No. Storing 100% of midday peak generation is usually wasteful — you would rarely fill it. Size to your evening/overnight load (roughly 40–60% of daily use) so the battery cycles fully every day, which is better for payback and battery life.
Yes. LiFePO4 supports 80–100% depth of discharge versus ~50% for lead-acid, and lasts 5,000+ cycles versus ~500. That means you need a smaller nameplate to get the same usable kWh, and it is far cheaper per kWh delivered over its life.
Yes. Modular systems such as NovaBESS HomeStack parallel from 5 kWh up to 60 kWh, so you can start with what your array and budget allow and expand as your use grows.
Tell us your array size, country and daily use — we'll respond with a configured LiFePO4 solution and distributor or OEM pricing.
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