Rooftop Solar Power Prices Go Down

by Antonio Pasolini on September 18, 2011

Via Lawrence Berkeley National Laboratory

A new report by the Lawrence Berkeley National Laboratory reveals that between 2009 and 2010, the cost of residential solar electric systems has fallen 17 per cent to $6.20 per watt. That is a $1.30 price decrease. Since 1998 prices have fallen 43 per cent.

According to CNET, the study is based on data collected from more than 100,000 installations of commercial and grid-tied residential solar systems under 10 kilowatts in capacity. Official rebates and incentives were not taken into account.

Report co-author Galen Barbose, of Berkeley Labs’ Environmental Energy Technologies Division, termed the fall ‘precipitous’, especially from 2008 onwards, and the reductions have benefitted end-customers. The report does not recommend waiting for prices to go further down, though, as declines can be offset by changes to state incentives for alternative energy.

Another piece of good news in the report is that other types of solar equipment such as inverters, and the installation itself, are also costing less.

Besides benefitting customers, the decline in costs impacts positively on solar leasing financing programs because providers can offer their services in more regions.

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