when it come to home solar power why do some choose 24v and others 12 v systems?

Image by mjmonty
Part of the 7.2 kW system in Bayview, WI USA (South of Milwaukee, WI). This is very likely the largest residential solar installation in Wisconsin. This home also has a detached garage, and the south facing roof of the garage is totally covered with PV panels as well.

This photo was taken during the fall of 2007 when I was on a tour of residential solar power installations in the Milwaukee area. It was so inspiring to see all of the small scale renewable projects that individuals are doing. It is my hope that the US government begins supporting these grass roots efforts on a much more meaningful scale in the very near future.

It is "Time for Change." It is time for renewable energy to be taken seriously by government leaders in the US.

Question by BAYOUKIDD: when it come to home solar power why do some choose 24v and others 12 v systems?
i want a solar power system, but dont know if i choose 12v or 24v and why.

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