We have entered R&D grid-independent hydrogen production since end of 2019 from customer inquire. One of our customers of Iowa wants to use wind power to produce hydrogen directly disconnected the grid. We searched all suppliers of electrolyser globally. But failed, and then we started to research grid independent hydrogen production tech. This tech was proved by a small prototype in laboratory level. We total invested in hydrogen production around $300,000 and has applied 5 patents including 2 PCT. The core tech is that each electrode in electrolysers can be controlled by cutting in/cutting off in series connecting according to the power changing from wind/solar. Each electrolyser can be controlled by cutting in/cutting off in parallel connecting according to the power changing. Current this tech can be used in PEM and the electrolyser without diaphragm. It also can be used in alkaline electrolyser when the diaphragm of alkaline electrolyser was improved. In fact, this tech is a kind of algorithms method and electronic control technology. It is regardless of the capacity of the electrolysis system.