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Old 08-12-2014, 07:34 PM   #1
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Smile All Electric

I am redoing a 65 Mobile Scout and I want to go all electric using an electric tankless water heater. Is this something unusual. I realize that if I sell it, no one will be able to camp anywhere but a campground, but the existing hot water heater is huge and takes up too much room. I would like to take it out and use that area for my refrigerator. The hot water heater is vented out the side with a pretty large square cutout on the wall and a lot of metal stuff on the exterior (vent) of my trailer. I think that tankless models needs to be vented as well, but I don't believe such a large hole is necessary. I know nothing about this sort of thing and need help so I can move on to covering the walls. Help!

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Old 08-12-2014, 08:06 PM   #2
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Posts: 3,337
All Electric

Check these out... There is a typo in the chart....where it says rinse should say rise.
....example - the water coming into the water heater is 60 degrees F so a 45 degree rise would produce unlimited hot water at 105 degrees F. Still possible to take hot showers at lower temps.....just mix less cold water(or none) at the shower head.

If your motorhome has 50 amp service, it's possible to get 240vac for the water heater by wiring to L1 and L2 without a neutral.

Also this thread is helpful...
Tankless water heaters on sale today at woot!

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Old 08-18-2014, 09:13 PM   #3
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Location: Part-time out of Bass Lake Retirement Community
Posts: 328
The first problem with that idea is that most RVs of that age only have a 30a power cord and in order to keep up with demand, most electric units are of the 240V & 20/30a variety. I think that you will have a hard time finding one that you can operate with the power available to you which will also keep up with an extended shower.

The other thing that I would say is that converting to all electric may work but you probably should rewire to have a 50A cord and distribution box just to be able to use everything when needed. No matter what you choose to do you won't get anywhere close to what you are spending if you sell an RV that is now approaching 50 years old so if that is a concern you probably should not do the remodel at all.

And if it matters, I am retired from electrical service work and am familiar with electrical theory and wiring.
Good Travelin! Kirk
Full-time 11 years, now part-time.
Kirk & Pam's Great Adventure!
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Old 08-18-2014, 10:57 PM   #4
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I have a 240AC tankless water heater in my workshop. Didn't want a pilot in the garage. works great for the sink & shower out there. Think you will need an electrician to hook up dedicated 30A just for the heater though. No vent required.
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