This partnership between Toll Brothers and Sunrun is a significant move that could have positive implications for both companies. For Toll Brothers, it demonstrates a commitment to sustainable housing and could potentially increase the appeal of their homes to environmentally conscious buyers. The inclusion of solar as a standard feature in California, a large and environmentally progressive market, is particularly noteworthy. From a financial perspective, this deal could lead to increased revenue for Toll Brothers through higher home prices or improved sales volume. For Sunrun, securing an exclusive partnership with a major homebuilder like Toll Brothers represents a substantial opportunity for growth and market expansion. The "one-stop shop" approach and the potential for expansion into additional markets could significantly boost Sunrun's installation numbers and recurring revenue from leases and power purchase agreements.