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Leonard Johnson
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1 Year as a User
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Last challenge activity
Solar Prize Round 3
The American-Made Solar Prize is a $3 million prize competition designed to acc…
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$3 million in total prizes, distributed through 3 contest stages (see rules)
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Dec. 5, 2019, 7:46 p.m. PST
Solar Prize Round 3
registered for challenge
June 18, 2019, 10:27 a.m. PDT
Solar Prize Round 2
registered for challenge
1 Year as a User
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