Mppt for rv is it worth it
I've been using a rv for full time off grid in summer in Virginia, I spend winter 30 minutes from myrtle beach. Currently I have 2 6v us battery gc 208 amp hrs @12 volt. With 4 100 watt panels 18.9 vmp 5.29 imp. a 30 amp non adjustable pwm controller puts out 22 amps and 308 watts. About a c/10 charge rate. A hybrid system a 2000 watt generator for microwave a toaster and an occasionally couple hrs for a 8000 btu ac. For cloudy days a 35 amp charger. A small 300 watt psw inverter for tv. On to my situation I'd like to double my battery bank to 416 ahrs. My thoughts are that I need 800 watts. 44 amps for roughly c/10. Twice the bbank double the panels and cc amps from 30 to 60. 4 100 watt panels $400. A 60 tristar pwm $200 for a 25 or 30 ft array the wire and the mc4 fusing $100. =$700 for 100% increase in power for About $50 more than a 60 amp tristar mppt $650 Most mppt claim 35% increase in winter and 15% for summer or 25% annual average increase. (25% for $650 or 100% for $750??) I understand if the array is 120 foot away the cost of wire alone would tip the scale. But not for a 12 volt rv. I no that I still havery racking to deal with but am I missing something? Any input would be appreciated.