U.S. electric car maker Tesla says it plans to start working with Japanese electronics company Panasonic Corp. on solar energy. Panasonic had no immediate comment Monday on Tesla’s statement on its corporate blog that the companies have signed a non-binding letter of intent to begin collaborating on production of photovoltaic cells and modules at Panasonic’s facility in Buffalo, New York. The deal requires shareholders’ approval of Tesla’s planned acquisition of San Mateo, California-based solar-panel company…