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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