We manufacture the battery backup systems in our warehouse and match them to a Grundfos sump pump selected for the required flow rate and operating time. Every unit is tested prior to dispatch. These are not cheap units, they are very high quality systems assembled using Australian Made inverters and battery chargers so you know that they will work when you need them. Primarily used in basements or underground garages where flooding would occur if the power failed in a storm, these systems can be trusted to perform well for many years. Please note that all of these systems operate automatically however, you must maintain the units and check the correct operation of the units every month.