About chargers - 50 Hz Chargers

50 Hz Chargers

Classic 50 Hz chargers are also referred to as linear or ferroresonant chargers. A transformer and rectifier transform the input AC voltage into a lower voltage DC. Voltage fluctuations at the primary (input) side are passed on to the secondary (output) side, causing a ripple that is detrimental to any VRLA battery.

The efficiency of a 50 Hz charger is about 75%. That is, 25% of the energy used is lost as it is converted into heat.