Have been searching and reading but am still confused. I will have a simple system in my fifth wheel RV to replenish battery power I use when boondocking. The basic system will be 1 Kyocera 135W panel, a morningstar 15A mppt controller and 2 UB121100 batteries with total 220AH rating. I want to buy an inverter whose basic function will be to power my TV (on occasion) charge laptop, ipod etc. I am thinking that I would not have to use my microwave, toaster etc. when boondocking. So that being said I understand that "bigger is not necessarily better" due to idling power consumption and of course initial cost So what I am thinking is that smaller inverter paired with a somewhat larger (say a 600W Xantrex prowatt TSW)converter may be the way to go. But I really don't know that I even need the 600 W and if it should be a sine wave rather than a modified wave inverter. Any help greatly appreciated.
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