Abstract
This chapter reports the result of short-term tests on three types of stand-alone systems. These tests are carried out in Grameen Shakti's laboratory. According to the battery manufacturer, depth of discharge and temperature affects the life and performance of the battery. The tests are carried out to find the depth of discharge at different temperature. For flooded lead–acid batteries, the water loss is directly related to the state of charge in the battery. In general, higher the state of charge corresponds to greater water loss. Allowance of this water loss needs to be included in system design or maintenance plans. The experimental results show that the life of the battery depends on the depth of discharge and is also affected by the temperature. The cycle life of the battery significantly reduces at higher temperatures. Also, the process contributing to battery degradation is generally enhanced at these temperatures. Considering the environmental condition of Bangladesh the battery should be used down to 60% or below discharge for better performance.