The Youth Power LiFePO4 Battery is the most reliable lithium battery with cycle life of over 5000 times (80% DOD). They are non-toxic, non-polluting with high thermal stability and greater depth of discharge that poses no fire risk and is guaranteed for 10 years of reliable operation.Here are 10 Units of 15 kwh solar system batteries for our UK friend, from now on, you don’t have to worry about the power failure of your villa!