Asked by: Berdaitz Kachwahaasked in category: General Last Updated: 4th January, 2020
How much power do battery chargers use?
Keeping this in view, how much power does a car battery charger use?
A basic charger usually charges at around 2 amps - and so needs 24 hours to deliver the 48 amps needed to fully charge a flat, 48 amp hour battery. But there is a wide range of chargers with different charge rates on the market - from 2 to 10 amps. The higher the charge output, the faster a flat battery is recharged.
Subsequently, question is, do battery chargers use a lot of electricity? For wall chargers it's often even less. Modern chargers go down to zero (or pretty close to it) when nothing's plugged into them. Even a charger using one watt when idle and plugged in constantly would use only about $1 per year at average electricity rates.
Keeping this in view, how much power does a 12v battery charger use?
A medium amp output 12 volt charger would be in the range of 20 to 50 amps or so, and be used for many applications using about 100 amp hours of battery and up, or applications with a constant amp load (power supply application).
How many watts does a battery charger pull?
However, if the battery has a 1-ohm resistance, users would require an 11-volt charger, which means users will have to provide 110 watts of power in order to acquire 100 watts to the battery. The 10 watts that remain turns into wasted heat. In addition, there is also energy lost while discharging the battery.