Workers install solar panels during a SunPower installation on a home in Napa, California, US, on Monday, July 17, 2023. SunPower stock collapsed more than 40% this week after the company informed dealers that it will no longer support new leases, installations or product shipments, with analysts largely writing the company off as on the verge of going out of business. SunPower stock has lost nearly all of its value the last 12 months, with shares down nearly90% to close at $1.51 on Thursday. "We think this effectively marks the end for SPWR as an operating business," Guggenheim analysts Joseph Osha and Hilary Cauley told clients in a Friday note. "Considering the debt that the company has accumulated, we believe that SPWR's equity no longer has any value."

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Persons: Roth, Guggenheim, Joseph Osha, Hilary Cauley Organizations: Guggenheim Securities, CNBC Locations: Napa , California