Good information, my car uses a 120 amp alternator so my losses are large, approximately 3.5 hp which when cruising on the hwy with the alternator cranking to recharge a low battery, my losses could be as hi as 25%.
Yesterday I split my 30 watt panel in two(it was 2 panels on a hinge) and put 1 panel on my Beetle's huge dashboard. The panel will keep my battery fully charged and aid the alternator when the car is in use.
I am pleased with the benefits of it.
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Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
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