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How To Wire A 12V DC Tankless Water Heater In An RV That Previously Had A 120V Water Heater  

Question:

I currently have a gas electric hot water heater. The electric is 120 volt. The tankless units are gas and 12V DC. Will I need to find or run a 12V DC source from somewhere or should there already be a 12V DC source at the present unit.?

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Expert Reply:

For your new tankless water heat that runs on 12V DC, such as Furrion RV Tankless Water Heater - Gas - Automatic Pilot - 60,000 BTU - 16" x 16" Door # FR98SR, you will need to wire this to your RV 12V DC battery and it's not likely there's already any 12 volt wring near your current heater and a 12 volt heater cannot run using 120VAC

I have attached a detailed installation video showing this process.

expert reply by:
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Andrew N
Ray V. profile picture

Ray V.

7/11/2024

Could you send me the video ...need to connect my Figatti RV water heater to my 12v battery

AndrewN profile picture
Etrailer Expert

Andrew N.

7/11/2024

@RayV You can see it here https://www.etrailer.com/tv-install-fogatti-rv-tankless-water-heater-2007-starcraft-homestead-lite-fifth-wheel-lsb64fr.aspx
Abby profile picture

Abby

8/31/2024

@AndrewN Does this video show installing a new 12v power supply for the hot water heater. I currently only have a gas hot water heater and I’m trying to install the tankless and need the 12v power
Lou profile picture

Lou

3/11/2025

@Abby no it does not, I can’t seem to find anything online about new wiring to a water heater that didn’t have electricity before… let me know if you found something so I can figure it out also, thanks

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