Solar Data Trove Cutting Power Use in Threat to Utilities
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Andrew Greenfield checks his home’s solar power output against consumption through his computer and mobile phone dozens of times each day. The International Business Machines Corp. storage engineer enjoys trying to match the power he consumes to heat his pool in Arizona with what he produces during the day from the panels on his roof.
Greenfield has paid nothing for power from his local utility since the system was installed by SolarCity Corp. a year ago. At parties and family gatherings he proudly shares his savings data with anyone who’s interested.