Off-Grid Solar Calculator: Panel, Battery & Inverter Sizing (2026)
Add your appliances and state; get the solar array, battery, inverter and charge controller size with the math shown.
Solar and stored power is the backbone of an off-grid property — get it wrong and every other system stops working. These guides cover the whole chain: the panels that harvest energy, the charge controllers and inverters that condition it, the batteries that hold it, and the transfer switches and generators that cover the days the sun doesn't show up. We size recommendations against real household loads rather than headline wattage, weight safety listings like UL1973 and UL9540 for anything permanently installed, and say plainly when the best equipment in a category is sold direct rather than on Amazon.
Add your appliances and state; get the solar array, battery, inverter and charge controller size with the math shown.
Running, starting and daily watt-hours for 58 appliances, each row linked to its manufacturer or government source. CSV download.
Rainwater, greywater, composting toilet and electrical code rules for all 50 states, with the official source for each.