Shipbuilders say local adoption is lagging as operators weigh costs, infrastructure and operational challenges. SINGAPORE: On the Singapore River, electric ferries are giving visitors a quieter and cleaner alternative to traditional diesel-powered boats. The ferries, which run on batteries supported by solar panels, are built by local startup Pyxis. Each boat uses about the same amount of power as two to three hairdryers while cruising, according to the company’s founder Tommy Phun. Five of