mart Energy USA is one of the most experienced Solar Contractors in The Bay Area and Southern California, mart Energy USA is one of the most experienced Solar Contractors in The Bay Area and Southern California, Since 2005 we have installed and serviced over 5,000 Solar Electric (Photovoltaic), Solar Pool Heating and Solar Hot Water. We are Solarworld's premier installer, all our installers are factory trained to deliver only the best installations and maximizing the performance of your system.