Battery Size Calculator
South West Tech — size your off-grid or backup battery bank
Not sure of your daily kWh? Use our Load Calculator first, or check your power bill (daily average).
— kWh battery bank
| Usable energy required (1.5 days) | — |
| Nominal capacity (after DoD, efficiency & margin) | — |
| Capacity at 48 V | — |
| Solar to recharge in a day (at 5.5 sun hrs) | — |
Guide only. Assumes even daily usage; generator-backed systems can run less autonomy. Battery life depends on temperature and cycling — we design for western QLD heat. South West Tech — admin@southwesttech.com.au · 0488 224 284.