"Will the cheaper ALTI-ESS made in china beat NaS battery only based on risk evaluation?"
This is a very good question in a way that may be answered by coming conclusion who will win the remaining 4MW ESS contract for China's largest renewable integration in Zhangbei city of Hebei Province. NaS battery was a favorite originally, but has been losing support in China due to the safety concern on the fire accident in Japan 2011. Phase 1 of the pilot project, using BYD and CALB's lithium-ion battery, has been running fairly well, though BYD's ESS pilot project in Southern Grid of China was reported having more than 20 times smoking incidents. The government officials repeatedly said it would focus on safety and long cycle life for the energy storage systems. Hopefully, ALTI-ESS gets the deal that could help ALTI become an elite player in China's ESS market overnight.