Can Dometic Gas Propane RV Furnace Run On Shore Power Without 12V Battery?

Published 08/22/2025

Products Featured in This Question

Dometic RV LP Gas Furnace - 35,000 Btu - 12V

(8)

$1638.99

Question:

I saw the DMC99MR says 12V DC power. Does that mean I can’t run it on shore power without a battery? Sorry I'm just confused here. thank you, steve

asked by: Steve

Expert Reply:

Steve, that’s an important detail, and it can be confusing.

The furnace blower and controls on most furnaces, such as the # DMC99MR (white door) or # DMC64MR (black door), are 12V, so most folks think you need a battery in the system even on shore power. However, your RVs converter will power the 12v fuse block in the panel without a battery, so you'll be fine to use the furnace without a battery installed.

Do you currently have a decent deep-cycle / marine battery?

expert reply by: Andrew N