One of China’s biggest makers of solar panels on Tuesday said it will invest $309 million to expand manufacturing in India in a move to guard against what it complained is a rising threat of import controls in the United States and other markets. Longi Solar Technology Ltd’s announcement follows the Trump administration’s January 24 decision to impose an extra 30 per cent duty on imported solar modules. An Indian regulator says it is considering a “safeguard tariff” of 70 per cent on solar panels from China and Malaysia. Chinese manufacturers dominate global solar panel production. Their explosive growth has helped to propel adoption of renewable energy by driving down costs. But the United States, Europe, India and others complain unfairly low-priced exports hurt their manufacturers and threaten thousands of job.