US residential solar company SunPower (<a href="https://www.nasdaq.com/market-activity/stocks/spwr" target="_blank">NASDAQ:SPWR</a>), which has been striving to cut costs and simplify its business model to tackle current industry headwinds, has suspended various services within its offering, including new lease and power purchase agreement (PPA) sales as well as new shipments and project installations of these financing options.