If there are no experienced-based responses, I will try to take a reading of actual power consumption soon. Remember that there are certain parasitic (always on) loads in a TM or any other RV.
In the meantime, I would suggest:
No use of lights. Bring a propane lantern or battery-powered lights.
Get a small self-regulating solar panel. I have a 5-watt panel on my boat battery (no drain) that keeps it up nicely. You can get a 10-watt panel for less that $20, no controller necessary.
Pull the fuses on other 12-volt circuits.
Bill
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