Because of SGIP[1], you can basically get a powerwall for free right now in CA depending on the circumstances. However, the requirements for the program all but

Because of SGIP[1], you can basically get a powerwall for free right now in CA depending on the circumstances. However, the requirements for the program all but guarantees it will use up the life of your storage system. Tesla's powerwall at least allows you to do things like set reserve levels to 15% or 30% to make sure you're not cycling your battery too aggressively, but if you don't meet the required 57 full discharges a year they'll disable features like this automatically. In other words you own it, but you don't control it. 1. http://www.cpuc.ca.gov/sgip/ http://www.cpuc.ca.gov/sgip/