Core Insights - Sunrun Inc. (NASDAQ:RUN) has seen a significant increase in its share price, rising by 6.11% from January 7 to January 14, 2026, making it one of the top-performing energy stocks for that week [1] - The company has formed a joint venture with HA Sustainable Infrastructure to finance distributed energy assets, with HA Sustainable Infrastructure committing to invest up to $500 million over 18 months [2][3] - Sunrun's innovative financing structure with HA Sustainable Infrastructure is a first-of-its-kind for residential solar and storage financing, allowing for a more efficient capital structure and potentially better financial outcomes compared to traditional financing [4] Company Developments - The joint venture aims to finance over 300 MW of capacity across more than 40,000 home power plants in the U.S., enhancing Sunrun's ability to monetize long-term customer cash flows while retaining significant ownership [3] - Sunrun reported a remarkable gain of nearly 99% in share price over the previous year, positioning it among the best-performing energy stocks in 2025 [4]