A few words from President Donald Trump about putting solar panels on the proposed wall at the U.S.-Mexico border sent solar stocks sharply higher on Thursday. SunPower (NASDAQ: SPWR) and Canadian Solar (NASDAQ: CSIQ) led the way, but First Solar (NASDAQ: FSLR) was also up as the whole sector seemed to be a bit cheerier being on Trump's good side for once.I first saw the idea of the "Solar Wall," if you will, floated by SunEdison co-founder Jigar Shah on LinkedIn and it's not at all a crazy idea if the wall is actually built.