Toolbox
Solar and EV calculators
Panels, batteries, inverters, DC cable and home EV charging, with every assumption editable.
Solar panel size
How many panels for your daily energy use.
Battery bank
Capacity in Ah and kWh, or runtime of a battery.
Off-grid system
Panels, battery, inverter and controller together.
Inverter size
Continuous and surge rating, including motor starts.
DC cable size
Smallest cable for a voltage-drop limit.
NECEV charger circuit
Breaker, ampacity and cable for a home charger.