Reference material
Sizing worksheets
Battery: daily Wh x autonomy days / planned usable fraction = nominal Wh before reserve. Then verify discharge current and BMS limits.
| Item | Value |
|---|---|
| Daily energy (Wh) | |
| Autonomy days | |
| Usable fraction | |
| Conversion/loss factor | |
| Required nominal Wh | |
| Nominal voltage | |
| Required Ah | |
| Peak battery current | |
| BMS continuous/surge |
Solar: daily target / (peak sun hours x system factor) = array watts. Then verify roof area, shading, cold Voc, Isc and MPPT output.
| Item | Value |
|---|---|
| Daily recharge target (Wh) | |
| Worst-season peak sun hours | |
| System factor | |
| Calculated array watts | |
| Cold-corrected string Voc | |
| Parallel array Isc | |
| MPPT input/output limits |