There are only 2 Solar Energy ETFs in the Market right now – TAN and KWT.Note buying solar ETF provides a less risky way of investing in solar energy as some stocks can dramatically underperform in this fast growing industry.However Solar ETFs will on the other hand perform much worse than the best performing stocks in the solar universe.This is because their holdings are also concentrated on some of the lesser quality companies.KWT and TAN are better investments for the less informed and less sophisticated investors.Amongst the 2 ETFs,KWT is the better option than TAN for a number of reasons which are described below.