Briggs & Stratton Energy - SimpliPHI 6.6 Battery: 6.65kWh, 48V STACKABLE - 10 Year Warranty. Includes (1) Wall Mount Bracket which can be used with either Base option SOLD SEPERATELY. All Briggs & Stratton Energy Battery System MUST include: (1) BSE-SPHI-BATT-CONTROLLER (1) BSE-ET-GATEWAY And (1) Battery Base (choose either): ...Floor Mount - BSE-SPHI-6.6-FLRMNT-BASE or ...Wall Mount - BSE-SPHI-6.6-WALLMNT-BASE ***All Battery / Storage products purchased from BayWa r.e. have a limited 30 day return policy. Returns must be in original packaging and unopened. A 15% restocking fee and return shipping charges will be deducted from amount credited for authorized returns.***