Just got back from a ten day break to France on Friday evening everything had been fine, went down to the van this morning no power, hab display flashing error SU 12 turned hab power off waited turned back on again still no power. Batteries at 97% but not on ehu, van is kept in our garage so no benefit from the main solar (700 watts) but have 1 x 100 watt panel on roof of garage just to keep them topped up. Everything dead no sat nav etc. in the end disconnect the hab circuit wire from the 12 volt positive buzz bar left it a minute reconnected everything ok. The van four years ago had a major power upgrade 700 watts of solar, 2 x 100 Transporter Lithium Batteries and a 12/2000/80 inverter//charger. All have worked faultless since then no issues professionally installed excellent standard of workmanship, system warranted for five years, batteries for ten, don’t think it is linked to that as system reset just by removing the original supply lead from the buzz bar and reconnecting, obviously with the next trip Portugal for90 days need to find out why. ??