Remember all the battery problems we had on the way down last year? I sure do. We replaced the two 6 volt batteries, the converter and then the batteries again!
We never boondocked after that so the new system was never put to the test. Two nights ago we overnighted in a Walmart and watched some TV. We had bought a new 26 inch TV that uses more power than the old one but with just the TV and Shaw Direct box on the battery steadily fell from 12.9 when it settled down after we parked to 12.4 a couple of hours later. and the amber warning light came on on my high tech battery monitor. Crap! It must also be noted that the weather was cloudy when we parked so the solar was of no help.
Today we are parked at another Walmart but under a bright sun and the battery monitor is jumping between 13.1 and 14 volts depending on whether there is a small cloud shading the panels or not.
I have two solar panels giving 225 total watts and two 6 volt batteries in series to make 12 volts.
I am thinking I might add two more 6 volt batteries in a series/parallel circuit to give me still 12 volts but double the amps. It will take a little longer to charge them but that should not be a problem. It will also add a couple of hundred pounds of weight to the right hand side but that is a fair trade off for the extra amperage.
Wow! The TV has been on for an hour and the voltage is currently at 13.94. The system I have now would be fine as long as we are in sunshine. But we are not always in sunshine. I am musing...