I still have a problem understanding why I would want a tankless water heater. I like getting free hot water when hooked up to park power when I'm hosting which I do 7-8 month/year. Why should I burn my propane when I don't need to? My Suburban 10 or 12 gallon heater (I forget which) never runs out of hot water when on electric. I used to turn on both electric and propane at the same time when my exec was visiting and showering, but even with her love of hot water my Suburban keeps up fine on just electric.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof