Features of Super PWRGate

Super PWRgate PG40S Backup Power System Features
A Super PWRgate is a 12 volt backup power system that can supply up to 40 amperes continuously from either a Power Supply or a Battery, and can also charge the battery with its high performance charger.
Connected equipment will instantly switch to battery during a power blackout or power supply failure. No glitches.
The circuit uses two 80 ampere Schottky diodes as an OR-Gate to isolate the battery and power supply from each other. Forward voltage drop of less than 0.3 volts at 20 A.
To keep the battery fully charged and ready for use, the Super PWRgate has a built-in four-stage battery charger with selectable current rates of 1, 4, 7 or 10 amperes.
The circuit is optimized for use with GELLED & AGM type batteries, but will keep flooded lead acid and marine type batteries near full charge as well.
The Super PWRgate and the power supply may also be used to charge a battery that is powering the radio, as described by W1ZR in QST.
 Maximum Voltage : 18 Volts DC
 Maximum Current :  40 Amperes
 Circuit :  Diode OR-Gate
 Diodes :  Two Schottky 80 Ampere, 20 Volt
 Voltage Drop :  0.25 Vdc at 1 Ampere
 0.5 Vdc at 40 Ampere
 Charging Circuit :  Charging regulator IC
 Field Effect Pass Transistor
 Schottky Diode
 Fuse switched for 1,4,7 or 10 Amperes (±5%) maximum
 Peak voltage limit: 13.8 (Gelled), 14.2 (AGM),(±2%)
 Peak voltage limit set via internal jumper to GELLED or AGM
 Peak voltage terminate point: 0.1 Maximum current
 Float Voltage: 13.5 volts (±2%)
 LEDs :  Green - Indicates charger is "ON"
 Red - Indicates peak "PK" charge voltage
 Yellow - Indicates Float "FL" voltage
 Connectors :  Anderson Powerpoles, 40A
 Size :  5.25 x 3.90 x 1.65 in, 13.4 x 9.9 x 4.2 cm
 Weight :  0.9 lbs, 0.4 kg
 Mounting Holes :  Two, 0.175 in. d, at a distance 4.875 in., for #8 hardware