Originally Posted by Rod
I am replacing incandescent with LED and not planning inverter "AC" products use. I have inverter and 110v plugs in my TV and Gen for 110v use via RV.
The biggest drain is the main heating. Depending on how cold it is outside will determine how much you drain the battery. For a standard 85Ah battery and a cold night, it will use up most of the 40ish Ah you can use of the (STANDARD) batteries 85Ah (it is called the 50% rule). If you calculate that out and say you did use 40Ah, you need to replenish that during the day. Given ideal SUNNY conditions (in 100% of the sun light, no clouds) if you get the 100Watt Solar panel, PWM Solar Charge controller, 4 hours of Fall/Winter/Spring productive sun light,
( Solar panel = 5.2 amp output x 12Volts (battery voltage) x 4 hours = 20.8Ah that the panel will put back into the battery. You can probably see where this is going, so the 1st day you will put back in 21Ah = about 60Ah available for night 2. So now on night 2 you may not make it through the night as you need to turn everything off when you battery voltage gets down to 12.0VDC. You will need to use a generator to assist the solar during the day to insure you get through the cold nights.
Summer should be no problem.
What ever you decide to do, you need to monitor the battery voltage. Pick up an inexpensive Digital Voltage Display and plug it into your 12VDC accessory outlet in the TT. Something like the one below... Amazon has all kinds