Constellation Energy Group Inc., owner of Baltimore’s utility, bought a minority stake in closely held Astrum Solar Inc. to offer solar installation services to its 1 million retail power customers.

US residential installer Astrum Solar will receive a US$100 million in financing from private equity firm Hudson Clean Energy, aimed at lowering PV system costs for its customers. The two companies ...

Energy retailer Direct Energy has acquired Astrum Energy for US$54 million, which it says will expand the range of products that it can offer to its customers. According to GTM Research, Astrum Solar ...

Founded in 2008, Maryland-based Astrum is a significant player in the northeastern US residential PV market, and has a presence in California, having installed about 4,000 PV systems in total. Direct ...