As California and other states have demanded utilities to order a lot more renewable power, demand from customers for that RECs has skyrocketed. So has their cost, from $15 to $75 a megawatt-hour in the last two yrs, experts say. Other solar electric making technologies refers to all solar electric https://sites.google.com/site/californiasolarcontractors/diy-vs-california-solar-services-which-one-to-opt-for