Three practical tools
Start with the load, make the assumptions visible.
These calculators are meant to help you frame a system before choosing hardware. They are not code-compliance certificates or substitutes for equipment-specific design.
01
Battery Runtime Calculator
Estimate usable battery energy and runtime from voltage, capacity, depth of discharge, load and inverter losses.
RuntimeUsable WhDC current
Open calculator 02
Solar & Battery Sizing Calculator
Turn a daily energy budget into a planning estimate for solar array size, battery capacity and inverter demand.
Array wattsBattery AhInverter estimate
Open calculator 03
DC Voltage Drop Calculator
Estimate conductor voltage loss and delivered voltage from system voltage, current, cable length and wire gauge.
Drop %Delivered voltsPower loss
Open calculator Method
Transparent enough to check by hand.
Each tool exposes the inputs and assumptions that drive the result. Where a value is only a planning multiplier or typical default, the page says so.
Read our calculation methodology →