Low voltage disconnect parameter

The low voltage disconnect parameter is the value at which system components - the low voltage disconnect charge controller and inverter - stop supplying power to loads. The function of the low voltage disconnect is important to protect the energy storage system against damage from over-discharge. This value depends upon the DC system voltage, the battery type, and the system usage. It is important to protect the energy storage system, but also to use a value that does not lead to the system regularly turning off loads during periods of heavy usage that cause the voltage of the energy storage system to drop temporarily. The low voltage disconnect parameter is used to determine the maximum amount of current for process of wire, overcurrent protection, and disconnect sizing and selection for the inverter circuit.

• Minimum recommended value for lead acid batteries: 11.5 V for a 12 V system. 23 V for a 24 V system. 46 V for a 48 V system.