Generelt kan et større batteri oplades hurtigere. Så en Tesla Model S med et stort 100 kWh-batteri kan oplades med en højere effekt end en BMW i3 med et 21 kWh-batteri. Det er også hovedårsagen til, at nutidens plug-in-hybridbiler (PHEV) ikke kan hurtigoplades: Deres batteripakker er simpelthen for små. De fleste PHEV-producenter inkluderer ikke den ekstra hardware (f.eks. ekstra input og ledninger) i bilen.

When the battery is almost fully charged the charge speed drops to prevent the battery cells from overheating. Typically at 80–90% SoC the speed drops and charging will slow down further closer to 100% SoC. That is the reason why fast charging is most effective between 0% and 80–90% SoC. Also, as mentioned before, the latest batteries are even set up to maintain a charge level of between 10-90%.

Battery cells operate most effectively between 20–25 degrees Celcius (68–77 degrees Fahrenheit). When battery temperature is too low or too high, the BMS reduces the requested current to protect the health of the battery cells. If the battery pack is equipped with a heating or cooling system (e.g. the BMW i3) the BMS will activate this system in order to control the cell temperature. Note that battery temperature is not only influenced by the outside temperature, but also by (highway) driving and (fast) charging as this will generally increase battery temperature.

When designing a battery, manufacturers have to make choices on size, weight, costs, life and performance of a battery. Depending on the target audience of the vehicle they could compromise battery performance over costs and weight for instance. Alternatively, a higher end vehicle will have better performance and may include battery temperature regulation, but it will also come with a higher price tag.