Lithium-ion solar batteries are a type of rechargeable battery used in solar energy storage systems. They offer high energy density, long lifespan, and low self-discharge compared to traditional lead-acid batteries. Lithium-ion batteries are widely used in residential and commercial solar installations, and are known for their safety and reliability. They are also lighter and more compact, making them easier to install in a variety of applications. The use of lithium-ion batteries in solar energy storage systems is growing due to their high performance and improved efficiency.