Victron Smart technology simplifies system setup, monitoring and firmware updates using the free VictronConnect app. Think of these monitors as your battery ‘fuel gauge’, with a time-to-go indicator and much more. Their essential function is to calculate ampere hours consumed and the state of charge of a battery. This BMV (Battery Monitor Victron) range are a group of high precision battery monitors. Added to all this is the free and ever popular VictronConnect app, plus the VRM Portal (also free) – where device monitoring, product configuration, firmware updates and data can all come together. Victron Energy have a great range of Battery monitors and accessories to suit. There is no warning that your batteries are almost depleted until it’s too late and the BMS shuts them off. Without a battery monitor you will not know when your batteries are about to shut down. Indeed, the voltage difference between two SoC values may be so small that it is not possible to estimate the state of charge with an acceptable level of precision. Lithium Iron Phosphate technology has the flattest discharge curve, which makes it very difficult to estimate SoC on a simple voltage measurement. However, Lithium-ion batteries have a much flatter discharge curve, which means that over a wide operating range, the voltage at the battery terminals changes very slightly. Lead-acid batteries have a relatively linear curve, which allows a good estimation of the state of charge: for a measured voltage, it is possible to estimate fairly precisely the value of the associated SoC. The diagram below shows that the voltage measurement difference between a DoD value of 40% and 80% is about 6.0V for a 48V battery in lead-acid technology, while it is only 0.5V for lithium-iron phosphate ! As an example, the diagram below compares the discharge curves between a Lithium-Ion battery. This relationship between voltage and SOC depends directly on the battery technology used. This voltage drop typically gives some indication that your batteries are running low. In lead-acid batteries, the battery voltage drops significantly as you use them. This data allows you to make better decisions on how to optimize your battery usage and charging. Your battery monitor also provides you real-time and historical information on voltage, power consumption, temperature, and more. Battery monitors do much more than just display the state of charge of your system. However, a battery monitor collects information and displays it so that you can optimize the performance of your entire battery system. A BMS collects data and uses it to optimize each individual battery. One of the most basic functions of a battery monitor is to display the remaining charge of your battery system. You can make many upgrades to your battery system, but one of the simplest and most useful is adding a battery monitor
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