Guides

Figures-first answers to the questions you ask yourself before buying: what a unit actually does, what it does not do, and how to size it for the use you have in mind.
How many Wh does a van fridge need to run all night?
A compressor fridge does not run continuously. The exact calculation, the factor everyone forgets, and the figures worth remembering. Read more...
Camper air conditioner with no exhaust: does it really exist?
Short answer: no. What is sold under that name rarely cools, and in a camper it often makes things worse. Here is why, and what does work. Read more...
Portable power for a camper: how to size it properly
A four-step method to work out how many watt-hours you need, with a worked example and the losses nobody counts. Read more...
Generator or portable power station: which one?
Two machines that answer the same need by opposite means. What really separates them: noise, indoor use, runtime and maintenance. Read more...