The 13~40KWH residential battery storage system is an intelligent HV solar rechargeable battery unit that enables homeowners to store electricity generated by the residential solar power system or grid for emergency battery power supply for homes. The excess electricity will be stored and provided when needed. SNE1228/1843/2457BL-LFP uses the BYD vehicle grade (LFP) battery, which has safer and more efficient performance. And we will help you design your battery appearance with BYD's original technical solutions. The product stackable design and is easy to install.