Quote:
Originally Posted by dirtydave
I also have a little 1.5watt solar panel on the dash. not sure if it actually does anything for MPG but its worth noting.
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1.5Watts is nothing. Maybe your offsetting your dash lights, but nothing more. As far as solar panels are concerned, you usually get more bang for the buck using the bigger ones. I'm not sure if you'd be interested in gluing one to your roof, a 50W at least, though I wouldnt know how to prevent overcharging if you'd be at work with the car off. I think you'd use a charging regualtor.
As well as for the batteries, you need to calculate your electrical loads with a clamp meter or maybe scan gauge might have a alternator value, but yeah, you need to measure your electric demand by having the car on, then have someone rev the car up to lets say 2K rpm and turn on the lights (if you drive at night) and that'll be how much elec. you need to run your car then do some simple math on how many mins/hours you need and then select an appropriate battery(s) you need to meet the demand. Maybe even a golf cart battery, those are deep cycle, but heavy! 60lbs!!! I would at least get a AGM or deep cycle battery as those can stand more abuse than your standard lead acid batts. Maybe relocating the batt to the trunk would be a good idea if you're going the multiple battery route.