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Big solar leaves rooftop systems in the dust

Large systems that sell directly to utilities will account for 70% of new solar added to grid this year

To what extent governments and ratepayers should support rooftop solar is a matter of debate in several state legislatures and utility commissions.

New York

SOLAR power is on pace for the first time this year to contribute more new electricity to the grid than will any other form of energy - a feat driven more by economics than green mandates.

The cost of electricity from large-scale solar installations now is comparable to...