Why is the battery fluid low alarm on even after the cells are filled to the proper level?
Be sure to add fluid to all six battery cells, and then place the sensor rod in the correct cell. Acid is only added the first time to activate the battery. Distilled water is used all subsequent times. The sensor rod should be in the second cell from the positive (+) terminal of the battery. If it is in any other cell, it is not measuring correctly. Make sure all 2½ inches of the sensor is inserted in the pre-drilled hole in the battery cap, or in the hole in the battery case, depending on which battery you own. An arrow on the top label points to the correct location.