BC-125 chargers have 170-305V input voltage range, enabling the use in most countries with nominal voltages ranging from 220VAC to 277VAC. The nominal output is fully available at all 170-305VAC range without derating. Chargers offer green mode of operation. The green mode consists on reducing the operating frequency when the load decreases. Thus chargers reduce their losses helping protection of the environment. At very small loads, they enter into a burst mode to reduce the consumption further. Chargers feature very low power consumption at no-load mode, helping again the protection of the environment. The peak efficiency of chargers exceeds 90.2%, resulting in lower long-term operational costs. As an example, compared to a 12V/5A charger of 80% efficiency, with 30% average load and 20 years of operational life, BC-125 will consume 500 kW-hour less electrical energy. This leads approximately to 50 USD less energy expense per charger. The rectifier fail output is capable of driving a relay or transmitting the operational status to a control module which will give an alarm in case of failure