posted on Apr, 9 2009 @ 05:42 PM
reply to post by rko_radio
I currently live in a small RV trailer and unless you're full time off grid, there's no way you can have enought battery and charging capacity built
in to sustain more than a few electrical devices with a 100 watt panel for very long. 3-500 watts maybe but not 100 watts. With a lack of space,
you might be able to pack enough battery to power 8 amps for a day with out recharging but that's about it. You'll need either a gas/diesel
generator or wind charger to back up your PV cell(s).
I have direct power to my lights and fans, and 4 cigarette ligher style plugs. Inverters eat into you efficiency which doesn't help your limited
storage capacity. For refrigeration, I use a 5-day cooler inside another well insulated box that has heat reflective roof coating on the outside.
I use big blocks of ice in water tight containers and not loose ice. With normal daily use, my ice box will stay at 45 degrees even on the hottest
of summer days. It will take about a week of normal use in the summer to complete melt the blocks in the cooler. One of these very small 12v
freezers can re-freeze one of my blocks in about a day, so I just cycle the blocks through once a day. Your fridge is your biggest power draw and
your most necessary after your lights and radio. Everything else is just luxury.