China’s fast-growing energy storage sector is drawing fresh interest from capital markets, with Sigenergy Technology becoming the latest to tap Hong Kong for funding, as companies ride a global push for renewable energy.The Shanghai-based firm was seeking to raise about HK$4.4 billion (US$561.6 million) via an initial public offering (IPO), according to its prospectus on Wednesday, as investor appetite builds around battery storage and smart energy systems that complement solar and electric vehicle (EV) adoption.Sigenergy planned to sell 13.57 million shares at HK$324.20 each, with 10 per cent allocated to Hong Kong retail investors and the remainder to international buyers,…