The Thunder Power TP1527PS is a dual output AC to DC switching power supply that delivers up to 15V/300W or 27V/550W DC output from 100V to 230V input. It delivers enough current, up to 20A, to sufficiently run one large capacity battery charger or two smaller capacity battery chargers simultaneously. It also features a variety of safety features including low voltage input, over-current, over-temperature and short-circuit protections.