The university of Southampton (University of Southampton) and found a new REAP systems cooperative research The lithium batteryAs photovoltaic energy storage device in the system, energy storage efficiency can be improved to 95%, can reduce the cost of solar powerAt present most of the PV systems also use lead-acid The batteryAs energy storage device, but, by contrast, the lithium iron phosphate battery replacement can give full play to its advantages, including higher energy storage efficiency, prolong service life, reduce the unit cost and so on.