Residential solar is struggling. One company's add-on is helping it hit 1 million installations.

Tech Insider
rooftop solar

REUTERS/Yuriko Nakao

See what the future of zero-emissions transit looks like in suburban Maryland

Tech Insider
An electric bus is parked under a solar canopy with chargers.
The Brookville Smart Energy Bus Depot in Silver Spring, Maryland.

Catherine Boudreau/Insider

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