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Old 04-14-2012, 10:02 PM   #37
MLXXXp
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MLXXXp has learned how to buy an e-book online
 
Posts: 37
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Join Date: Dec 2009
Location: Toronto, Canada
Device: Aluratek Libre, Nokia N800
Quote:
Originally Posted by Ken Maltby View Post
Having even a number of small panels go to an adapter, designed to regulate the power from the much greater amp capacity of an automotive electrical system, is a simple and inexpensive measure to insure compatible power for your device.
Simple and inexpensive, yes. Unfortunately not very efficient. As can be seen from my tests, these adapters don't do a great job of converting the 12V down to 5V.

My test adapter, and another rather more expensive Motorola SYN0847 adapter, were both only about 70% efficient. 30% of the power coming from the panel(s) will be wasted as heat in the adapter. The power output capabilitiy of the panel(s) has to be increased to compensate.
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