backchannel: timeshifting opportunity loads with solar in the UK

factor in that you can use the pc during daylight, and with sufficient solar panels recharge the battery some before sundown. So you might be able to get by with a little less if you’re using it during the day {emphasis added}

I agree timeshifting loads to periods of excess power is a useful technique. Unfortunately, OP has no periods of excess power; he’s running a chronic (and in winter months a massive) power deficit.

He cannot mount enough panel on his van to meet his stated power needs in the UK. Because of tragic winter harvest levels I estimate it would take 9,914w of panel to meet his stated power requirements with solar. Needless to say, that won’t fit on a van.