Home solar company SunRun has partnered with the Sierra Club, an environmental organization, to bring solar installations to homes in Southern California.
As part of the partnership, SunRun says it will give $50 to the nonprofit for every Sierra Club supporter who signs up for a free solar evaluation, plus $1,000 for every member who installs a solar array with SunRun.
Sierra Club is offering a solar evaluation to its supporters through this link.