Yes the ignition system for those are electric, that’s normal. Shouldn’t be killing even a normal 12V deep cycle battery in less than 24 hours. You must have something sucking power. Are there lights in your storage bins? Radio/stereo on standby? We found turning off the water pump when not in use helps. If you had the furnace on that would do it too, the fan for them can really suck power.
With our first RV we could go 6-7 days on a single 12V standard battery with running lights 3-5 hours a night, the fridge, water pump and water heater. The new ones are far less efficient though.
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