Useful links to related resources...

Will Prowse - the motherlode of solar battery knowledge

Explorist - pro van electrical advice from a pro

Everlanders - the overlander's holy grail laced with some magic maker tips

Technomadia - mobile comms

Humble Road - Sprinter van builds

Andreas Speiss - the guy with the Swiss accent - raspberry pi and home automation

The Hook Up - Home Automation ground zero