Zhangye City in China’s Gansu Province has approved a 34 MW, 136 MWh gravity energy storage project, plus a 10 GW wind-solar hybrid plant which includes hydrogen storage with ammonia-alcohol integration. BOE Technology, a Chinese LCD, OLED and flexible display manufacturer, has entered perovskites with a $14 million investment. Aiko Solar will invest $833 million in a new 15 GW TOPCon solar cell factory, as well as $377 million to upgrade 25 GW of its PERC production lines to TOPCon at its Yiwu facilities. Goodwe has begun operations at its 5 GW inverter factory in Vietnam. Tongwei has commissioned the first 120,000 tons of its new up to 360,000-ton polysilicon factory in Inner Mongolia, China. Another company has received approval…