Sunrun

Sunrun pioneered the solar-as-a-service model that made rooftop solar accessible without a large upfront payment, and that lease/PPA innovation, combined with the 2020 Vivint Solar acquisition, made it the largest residential solar installer in the US. The Brightbox battery platform and virtual power plant partnerships with utilities are genuinely forward-looking, positioning Sunrun as more than just a panel installer. That said, the brand has faced persistent criticism over installation delays, inconsistent local crews, and customer service complaints common across the door-to-door solar sales industry, and its stock has been volatile amid rising interest rates that pressure the financed-solar business model. For homeowners prioritizing no-money-down access over lowest lifetime cost, Sunrun remains a credible if imperfect option, though investors should weigh the sector's rate sensitivity carefully.