John Dixon

Actually measured this last summer in mine—ran a thermocouple logger on the battery box whilst doing a full charge cycle in July heat.

I've got a boat conversion running parallel to the main off-grid setup, and honestly microhydro's been the revelation for me too.

Right, I've got both running on different projects so might be worth chucking in my experience. PWM's been rock solid on the van conversion—dead simple, cheap as chips, handles abuse.

The narrowboat angle is interesting because you're fighting geometry as much as budget. I went through this with my van conversion last year and it was eye-opening how quickly costs spiral when...