A reliable DCtoDC buckboost converter that maintains a stable 13.8V output from a wide 10–36V input range. Rated for 30A, this regulator delivers consistent power to 13.8V systems whether the source voltage is below or above the target, solving common problems with running 12V equipment from variable vehicle, boat, or battery sources. Key benefits Maintains a steady 13.8V output even when input voltage falls below or rises above the set point, preventing equipment brownouts or overvoltage. Supports loads up to 30A, making it suitable for current 12V devices and charging applications. Wide input range (10–36V) provides compatibility with typical 12V and 24V vehicle, marine, and battery systems, simplifying integration into mixedvoltage environments. What makes it useful Solves the problem of fluctuating input voltage by using buckboost conversion to produce a consistent 13.8V supply. Eliminates the need for separate stepup and stepdown regulators when working with varying or mixedvoltage sources. Provides a single, compact solution for powering 13.8V devices from alternators, battery banks, or other DC sources in vehicles, boats, and offgrid systems. Key attributes Functionality: DCtoDC buckboost converter/regulator that outputs 13.8V DC. Input compatibility: Operates from 10V up to 36V DC input. Output performance: Regulated 13.8V DC output with a 30A current rating. Suitable applications: Designed for use where a stable 13.8V supply is required from variable DC sources. Typical use cases Automotive and RV systems: Power or charge 13.8V accessories and battery systems from both 12V and 24V alternators and battery banks. Marine and offgrid installations: Provide stable 13.8V power for navigational electronics, radios, and charging circuits where input voltage can vary. Communications and equipment racks: Supply a reliable 13.8V rail for amateur radio gear, amplifiers, and other 12Vclass devices that require precise voltage. Practical notes Check that connected loads do not exceed the 30A rating to maintain performance and longevity. Confirm wiring and fusing practices appropriate for the current rating when installing into vehicles or battery systems. This 10–36V to 13.8V DCtoDC buckboost power supply converter regulator (30A) is a straightforward solution for delivering a stable 13.8V supply from a wide range of DC sources.