Exhibit 99.1 Sunrun Reports First Quarter 2026 Financial Results Aggregate Subscriber Value of $1.1 billion in Q1 Contracted Net Value Creation of $108 million in Q1, or $0.46 per share Storage Attachment Rate reached record 73% in Q1 Net change in cash and restricted cash of -$148 million and Cash Generation of -$59 million in Q1, owing to a shift in project finance timing into Q2 and investments in safe harbor 1 Paid down $92 million of recourse debt in Q1 with excess cash SAN FRANCISCO, May 6, 2026 -- Su ...