Tankless propane hot water heaters

Mixing 130 degree water from your water heater with say 60 degree water from your fresh water tank you'll be at about a 60/40 mixture to obtain normal shower temperatures. So, to run out of hot water you would be using about 10 gallons of fresh water taking a shower. That's 1/3 of your fresh and gray water tank capacity before you'd need to think about having a tankless system. No one is going to do that boondocking or even in cases when you have partial hookups. For myself, if I use more than gallon of water taking a shower while camping I'd be surprised. 

If you have full hookups you could do it, but I would think you could also just as easily go use a campground shower in that case. If you only camp with full hookups and you really wanted an infinite supply of hot water you could consider removing your gas water heater and installing an electric tankless one. They're really small, only weigh a few pounds, give you very precise temp control, are faster to turn on than the gas ones, and have minimal clearance requirements and no flue and ventilation requirements. You would need a 50A service to run one. I use an electric tankless at home and I can control the water temp to 1 degree of accuracy, which is why I love it so much. 

 

I'm pretty sure in roughly 6 years if camping with the Pod I've only had hookups that included sewer twice.  (That's my style and I understand others' experience may be a lot different.)  Anyway, the point is, why have unlimited hot water if you only have a 30 gallon gray tank to put it in?

We leave the water heater on when we camp for a week.  I hear it come on very occasionally -- unless we're taking showers (actually using the hot water) -- I don't think there can be much savings of propane with a tankless heater, especially as others have mentioned, since a lot of people only use it at all a few weeks out of the year.  The WH in the Pod just doesn't use all that much propane in the first place.