California startup HahaSmart aims to become low-cost disruptor in solar SACRAMENTO, Calif.: After two and half years R&D, privately-funded solar tech startup HahaSmart launches solar O2O (online-to-offline) platform (www.hahasmart.com) that gives homeowners the ability to design a home solar system, receive an accurate detailed price list within 2-3 minutes, and purchase a home solar system […]