State of Charge (SoC)
What is it?
State of Charge (SoC) represents the current level of energy available in an electric vehicle's battery, expressed as a percentage from 0% (empty) to 100% (full). It is the EV equivalent of a fuel gauge in a combustion engine car.
How it works
The SoC is continuously calculated by the vehicle's Battery Management System (BMS). The BMS measures voltage, current, and temperature across hundreds of individual battery cells to estimate how much usable energy remains. Because battery chemistry is complex and affected by temperature, the SoC is an estimation rather than an absolute physical measurement.
Why it matters
Understanding your SoC is crucial for trip planning and battery longevity. Lithium-ion batteries degrade faster when frequently charged to 100% or drained to 0%. For daily driving, maintaining the SoC between 20% and 80% is widely recommended to maximize the battery's lifespan.
The Aximote Advantage
While most smartphone apps rely on delayed cloud data or rough GPS estimates to guess your battery level, Aximote runs natively on Android Automotive OS. This means Aximote reads the exact, real-time SoC directly from your car's CAN bus and BMS. When Aximote logs a trip or calculates your charging costs, it uses the precise battery data straight from the source, ensuring 100% accurate energy tracking without any guesswork.