My top two contenders for an Electric Hot Water Heater with tank would be:
1) Ecotemp 7 gal. http://www.homedepot.com/p/Eccotemp-7-Gal-Capacity-Electric-Mini-Tank-Water-Heater-EM-7-0/302962987?cm_mmc=Shopping%7cTHD%7cG%7c0%7cG-BASE-PLA-D26P-WaterHeaters%7c&gclid=EAIaIQobChMIo42J_O7f1gIVEDFpCh28PwxXEAQYASABEgLFw_D_BwE&gclsrc=aw.ds&dclid=CI3EqZDv39YCFVYvaQodoLAGzg
2) Bosch 7 gal. http://www.homedepot.com/p/Bosch-7-Gal-2-Year-Electric-Point-of-Use-Water-Heater-ES-8/206428468
The size(s) should work fine, but my concerns on the tanked water heaters would be how they would hold up while traveling. I've noticed that they appear to have a glass lining. Does anyone have any experience with either of the units? With all the bumps and jars we all experience going down the road, are these Hot Water Heaters Road Worthy?