In this video, I try to estimate "accurately" how many amp hours these heaters consume under various usage conditions.
Many people have been asking what heater I use. It's a really cheap heater and after 3 years and frequent use it still works perfectly, so I thought I would share a link to the exact same unit I have:
https://www.amazon.co.uk/gp/product/B07N63XV4S/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B07N63XV4S&linkCode=as2&tag=dsohan-21&linkId=06f096064c96e9dd99c2735d865de9da
If you are running any diesel or gas-powered heater in your van I'd also highly recommend using a Carbon monoxide sensor. This one that shows parts per million seems to work really well! They're pretty cheap, and could save a life!
https://www.amazon.co.uk/gp/product/B00ON5LYJY/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B00ON5LYJY&linkCode=as2&tag=dsohan-21&linkId=41cebe2f67802ba846d3ada23243e3e6
People have also asked what power meter do I use for these tests. It's this exact same meter, and it seems fairly accurate. You can get better ones, but they cost a whole lot more.
https://www.amazon.co.uk/gp/product/B07M5XD4G9/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=B07M5XD4G9&linkCode=as2&tag=dsohan-21&linkId=7cc1ff5284de233564811fe27f0d9e9e