In addition to its core businesses as a module supplier and EPC contractor, California-based SunPower competes with US rooftop installation specialists and financiers like SolarCity and SunRun in offering residential PV leases and loans.

Yet even with its roughly 1.1GW of module capacity running at full utilization, SunPower’s “residential energy solutions” business booked just 12.1MW of business in the most recent quarter, and installed 8.4MW.

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