solar options
Last summer I had a 240 watt kit(from Solar Blvd.) Installed on our MH. It has two 120 watt panels feeding a 20 amp charge controller. I recently had the two stock 12 volt marine house batteries rep...
Forum Discussion
With four T-105's, you have 450 Amp hours at 12v. 50% discharge means that you'd need to replace 225 amp hours, per day. Basic rule of thumb, on the weak side, is 1 watt of solar, or more, per amp hour of battery. In the winter, you will likely need more than 1 watt per amp hour.
Since you already have 2 120 watt panels, for 240 watts, and about 13 amps, I would add another 2 120 watt panels, if you have the room, at a minimum, which should bring you up to a max charge rate of 26 amps an hour. You are capable of using 250 amps a day, that's 11 hours of charging under ideal conditions to get it all back. In winter, 6 or 7 hours is tops. Each panels will generate about 6. to 6.5 amps, peak, so a 30 amp converter of some sort should handle all your needs, in the summer, not so much in the winter, more panels are needed due to lower sun angle and shorter days.
Something like this:
Charge controller
In my view, until you know what your daily consumption is in amp hours per day, it's pointless to buy more panels, one at a time, or two at a time.
Nail down how many amp hours per day you go through on the shortest day of the year, and take it from there for worst case scenario.
Since you already have 2 120 watt panels, for 240 watts, and about 13 amps, I would add another 2 120 watt panels, if you have the room, at a minimum, which should bring you up to a max charge rate of 26 amps an hour. You are capable of using 250 amps a day, that's 11 hours of charging under ideal conditions to get it all back. In winter, 6 or 7 hours is tops. Each panels will generate about 6. to 6.5 amps, peak, so a 30 amp converter of some sort should handle all your needs, in the summer, not so much in the winter, more panels are needed due to lower sun angle and shorter days.
Something like this:
Charge controller
In my view, until you know what your daily consumption is in amp hours per day, it's pointless to buy more panels, one at a time, or two at a time.
Nail down how many amp hours per day you go through on the shortest day of the year, and take it from there for worst case scenario.
