From what I've read, Size the solar panel output to your batteries. I have 2 group 31 AGM batteries with 105 AH each. Don't discharge them lower than 50%. To recharge 1/2 or 55 AH, you need about 10 amps for 5:30 hours under near perfect daylight conditions. A Kyocera 140 watt or similar will do that for one battery. For me, two would be the proper amount of solar but if I could, I'd install 3 x 140 watts = 420 total watts. 420 x .707 = 297 real world watts. Less on cloudy days, in shadows, intermittent sun breaks, sun low in sky during winter. Being that the Kyocera outputs in the 17-18 volt range, you may not want to invest in a MPPT Controller but get a cheaper, good quality PWM controller with thermal sensing and an auxiliary load output. The second load output can be used to charge your truck or electric trolling motor batteries when the TC batteries are full. The Trimetric is a good idea.
