Balmar’s Smartgauge™ battery monitoring system provides accurate, dependable information about battery condition, without the need for shunts and complicated programming. Simply select the battery program that most closely matches your battery technology. The Smartgauge features voltage and stage of charge displays, as can be used to provide alarms for low battery voltage and capacity. As with all electrical components, take time to read and follow the instructions provided in this manual. Failure to do so could result in damage to the Smartgauge and/or your electrical system.
• House (Primary) Battery Voltage
• House (Primary) Battery State of Charge
• Engine (Secondary) Battery Voltage
• High/Low Battery Voltage alarms for each battery
• High/Low State of Charge alarm for auxiliary battery
• Bright LED daylight readable display
• Volt free alarm contact for firing external alarms, relays etc
How The Smartgauge Works
Conventional battery monitors count amp hours in/out of the battery to determine the battery’s state of charge (SOC). This method is inherently inaccurate due to the State of charge of the battery not necessarily being linked to the amount of energy a battery can deliver (due to temperature, how quickly the battery was charged/discharged, battery age, and other outside factors). Unless the battery monitor is regularly reset (either automatically by fully charging the battery or manually reset by the user), the reading error will compound (known as synchronisation error).
In most battery monitors, a shunt is used to monitor amperage in or out of the battery. Unfortunately, in many cases shunts can be incorrectly installed, and inaccurate amperage readings occur.
Smartgauge uses just two wires to monitor the battery. Through these wires, we use proprietary test methods to generate data. This data is then compared to detailed computerized battery models. Smartgauge compares real world data with those models to generate information on the battery’s state of charge. In independent testing Smartgauge was found to be within 5% accuracy at all times.
Highly accurate state of charge information not only allows you to confidently make decisions about how you use your electrical system, it also allows you to automate certain functions – like load shedding or generator start/stop.
Smartgauge uses a self correcting algorithm to determine battery State of charge, so over time it actually becomes more and more accurate. This self correction also means that Smartgauge automatically adjusts for battery degradation as the batteries are repeatedly cycled. Smartgauge needs to see 2-3 charge/discharge cycles to synchronize with the batteries.