Specialty calculators

Off-grid power

Planning figures for a van, a boat or a cabin. The installation itself belongs to an electrician.

Daily consumption

Daily watt-hours and amp-hours from a list of appliances.

Battery bank sizing

Bank capacity in amp-hours and kilowatt-hours, and the modules it takes.

Solar yield

Daily yield, amp-hours and the array a daily load would need.

Charge time

Bulk and absorption time, amp-hours and energy to reach full.

Inverter sizing

Inverter rating, surge, DC current and fuse size.

Cable size from voltage drop

Cross-section and AWG for a run within an allowed voltage drop.

These are planning figures, not a substitute for a standard, a specification or a professional. Check anything that matters against the source your trade actually works to.