MARS Energy Group has acquired Citadel Roofing & Solar for an undisclosed amount, bringing the California-based residential and commercial installer under its corporate umbrella. The transaction, which closed recently, transfers ownership of Citadel’s operations, workforce, and existing project pipeline to MARS Energy Group, which will now manage the company as a wholly owned subsidiary.
Citadel Roofing & Solar has operated for more than three decades, specializing in integrated roofing, solar panel installation, and battery energy storage systems across California. Its team has worked with homeowners, businesses, and homebuilders, building a reputation for reliability in a state with demanding energy and construction standards. MARS Energy Group, an energy services firm, focuses on expanding its footprint in distributed generation and storage markets. The acquisition gives MARS immediate access to Citadel’s established customer base, installation crews, and regional supply chain relationships.
For MARS Energy Group, the purchase is a direct route to scale in California’s competitive solar and storage sector. Rather than building new branch operations from scratch, the company gains a seasoned workforce with verified installation experience and a track record of completing projects across diverse climates and building types. Citadel’s roofing expertise also adds a complementary service line, allowing MARS to offer integrated roof-and-energy solutions under one roof-a combination that is increasingly in demand as homeowners replace aging roofs alongside solar retrofits.
The combined entity will continue to serve Citadel’s existing clients under the same brand, while MARS Energy Group provides back-office support, procurement leverage, and access to larger capital resources. No changes to current project timelines or warranties have been announced. The acquisition is expected to strengthen MARS’s position in the California market, where regulatory shifts and utility rate structures continue to drive homeowner interest in solar plus storage. The new structure will likely allow for more competitive pricing on larger installations, though specific operational plans have not been disclosed.