It would cover 7,000 sq.ft. of roof area. And that's based on 50% of our electricity needs. If we were to go to "100%" it would be 14,000 sq.ft., but the cost doesn't double (closer to 1.6 times the cost) since other incentives, rebates and other discounts would apply.

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)