Guides

Short pieces that explain the reasoning behind the calculator, without the padding.

How to size a solar generator

The difference between watts and watt-hours, why panel wattage is not the same as charge rate, and how to work out what you need.

The humidifier question, why a camping battery is not a medical device, and which verified models cover the estimated dry and heated loads.

A 12V fridge, laptop, light, and phone, matched against the verified catalog. Smallest adequate model first.

Which peak figures are inverter surge, and which are resistive boost ratings that do not clear a motor start.