I thought I had read somewhere about photovoltaic paint... that someone was experimenting with it, trying to turn the paintjob on their car into a giant solar cell... I'm not sure how this would work, but it might be something worth looking into...
If nothing else, you could have the most expensive paint job on the block...
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"