I assume you mean 50 amp hours.
My Norcold draws about 40 watts on 12 volts or 40 watts / 12 volts = 3.3 amp hours and runs lets say 50% of the time or a total of 3.3 X 12 Hours (50% of the time) = 40 amp hours.
That 50 amp hours would seem to be marginal for my needs.
I hope to install 200+ watt panels and do a little better than I need to keep the
Refrigerator running on Solar alone. Perhaps I need to plan on a little more rating.
The reason that the current delivered into the
battery is not as high as the panel rating (for one reason) is that the voltage at the current rating is higher than the
battery charging voltage pulling the panel down the curve. An MPPT controller has a DC to DC converter to translate the higher voltage at the peak of the panel and converts that to the voltage to properly charge the battery.
Bogart says the trade offs are not as serious if the battery charge is maintained closer to 13 volts and the panels are nearer normal temps and not cold.
It seems to get pretty complicated.
I think I will start with the Bogart system powered from the converter to maintain the battery in good condition when plugged in. Later I think I will add two of the flexible Renology panels to make sure I have enough keep the 12 volt system in good shape plugged in or not.
I want to be able to park the rig anywhere leave it for a day or so and not worry too much about the
electrical systems. Also I want the
electrical system to not rely too much on the power from the tow car to keep the thing charged.
I am also working on
LED lights and I haven't decided if I want an inverter or not for the
microwave etc. For cooking other than the Convection
microwave I am looking at the
Propane grills that hang on the side of the camper next to the door.
Redoing this
Scamp os a work in progress!