What Is The Cheapest Way To Store Solar Energy?

The cheapest way to store solar energy is a flow battery energy storage system
Flow battery energy storage system is a relatively new energy storage method.
Compared with other energy storage batteries, all-vanadium flow batteries have the following characteristics:
(1) Output power and energy storage capacity are controllable. The output power of the battery depends on the size and number of the stacks, and the energy storage capacity depends on the electrolyte capacity and concentration. Therefore, its design is very flexible. To increase the output power, just increase the area and number of stacks. Energy storage capacity, just increase the volume of electrolyte.
(2) High safety. The existing battery systems developed mainly use aqueous solution as the electrolyte, and the battery system has no potential explosion or fire hazard.
(3) The startup speed is fast. If the stack is full of electrolyte, it can be started within 2 minutes. It only takes 0.02s to switch between charging and discharging states during operation.
(4) The battery has good rate performance. The active material of the all-vanadium redox flow battery is vanadium ions of different valence states dissolved in aqueous solution. During the charge and discharge process of the all-vanadium redox flow battery, only the ion valence state changes, no phase change reaction occurs, and the charge and discharge response speed is fast. .
(5) Long battery life. There is only one type of electrolyte metal ion, vanadium ion, so the problem of cross-contamination of positive and negative electrolyte active materials will not occur. The battery has a long service life and the electrolyte solution is easy to regenerate and recycle.
(6) Battery self-discharge is controllable. When the system is in shutdown mode, the electrolyte in the tank will not self-discharge.
(7) Convenient to manufacture and install. The wave battery has great freedom in location selection, the system can be fully automatically closed and operates without pollution, is easy to maintain, and has low operating costs.
(8) Battery materials are easy to recycle and reuse. Most of the flow battery components are cheap carbon materials and engineering plastics. The materials are rich in sources and will not produce pollution during the recycling process. They are environmentally friendly and low-priced. In addition, real-time monitoring of the battery system's state of charge (SOC) is relatively easy, which is beneficial to the management and dispatch of the power grid.