Sunpower modules can wired 2 in series for the 200 watt 72 cell modules
and 4 in series for the 90 watt 32 cell modules with typical negative
grounding. The power loss effect is not a problem in low voltage
systems. AEE Solar has private-labeled modules for battery charging,
made with Sunpower cells in sizes from 20 watts to 90 watts if you are
looking for high efficiency battery charging modules.
David Katz
_______________________________________________
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