Solar Lithium Powered Pond Pump Backup Batteries

Free shipping 50 states. Please read this description before purchasing any battery.   (The large battery for use with 100W pumps is sold out with more expect end of January 2026) My Natural Pond recognizes the need to have solar pumps continue running when there is limited or no sun.  Providing this facility for our powerful range of solar pumps demands some trade-offs to keep the costs reasonable and the performance acceptable. These lithium batteries meets this need by lowering the pump speed by 20% and for a waterfall application it reduces the max. head from 10 to 6 feet. In return for this performance degradation the battery can provide up to 7-10 hours of continuous running after the sun goes down.  The battery can only charge up when there is sunshine.  The battery may need 1-2 hours of sunshine on a sunny day to charge up and power the pump. Please note there can be occasions where bad weather extends for many days and neither the pump or battery will not work dur