In a power critical environment it is crucial to know the continuous state of health of the lead acid batteries supporting the critical load daily. Our battery monitoring system ensures that these critical batteries are in a good state of health and will function according to design when required. The system has been designed for daily monitoring of the conditions of the batteries. By avoiding the time consuming and potentially dangerous manual method of testing individual batteries, the system dramatically increases the likelihood of identifying a potential failure long before it becomes a power continuity problem.