I don't really understand what you mean by 'open source' energy. Energy techniques are just basic science and therefore there isn't any 'closed' or 'open' source really its all just 'Open' source. For example the vendor you buy your energy from gets their energy via electromagnetic generators which can be viewed by anybody in scientific articles/design. The problem is not 'closed' source companies it all comes down to consumer money. Consumer's money are funding dirty energy instead of clean energy. You could power your home with a small solar panel array and there are companies that are willing to assist you in doing this however I suspect that you like many others will not put forth the high initial cost to do so. Instead you and others just pay the power company for their dirty power every month so you don't have to worry about the high initial cost of clean energy. There have even been companies that will install solar panels for free on your home and just charge you per month like traditional power companies (See SunEdison https://www.thestreet.com/quote/SUNE.html) however they have gone bankrupt due to the high initial cost.