Compact 30A Switching Power Supply w/Meter
MFJ-4230MV provides 25 amperes continuously or 30 amperes of current surge at 13.8 VDC. The voltage is front-panel adjustable from 4 to 16 volts. A front-panel push-button switch lets the user read either amperage or voltage. It has 75% efficiency and extra low ripple and noise, <100 mV, according to MFJ, and features over-voltage and over-current protection systems.