APS – Advanced Real-time Battery Monitor provides real time knowledge about battery conditions. This is very significant to ensure the performance of the critical power systems in place. Existing methods of manual measurement or online battery monitoring systems will require very complicated wire connections, labour intensive installation, and commissioning, professional technicians at very high costs. The investment is large. The APS-Advanced Real Time Battery monitoring system is an innovative solution to solve these problems. We apply new methods to measure battery condition and communication by PLC methodology. With multi-frequency measurement, users can analyze batteries in all aspects including internal resistance, voltage, current, capacitance, temperature etc.…. Based on APS’s years of experience in battery management, a mature mathematical model that will precisely predict battery capacity is ensured.