Washington Post: As a home renovator, Torsten Seling said, he never liked solar panel technology, which he thought relied too heavily on batteries that leave behind toxic waste. But he said he changed his thinking last year after a trip to Germany, the world leader in solar power capacity. Now he thinks the potential is huge. “If solar works in Germany, it works in the United States, because we have so much more sun to begin with,” Seling said. “We have big houses that happen to be under big …