24V 20Amps Schauer Power Supply Battery Charger /Tender with 3 PIN Bonanza Type Plug
Model: JAC2024H $305 plus shipping to lower 48only - No Tax (Aircraft Spruce sells for $415)

Used lightly at 2nd hangar.

https://www.aircraftspruce.com/catalog/elpages/portPowerCharger24ces.php?clickkey=1871604

Intelligent chargers follow battery impedance to end of charge cycle for all battery types. Fully automatic. Green LED indicates AC power on, yellow LED indicates battery is charging, yellow LED off indicates float mode.

Charge control: constant current charge to a constant voltage, then to a float standby.
Current limiting.
Fully automatic 3 stage charger can be left on the battery in maintaining/float mode.
Can be set for any type lead acid battery, including conventional, maintenance free, deep cycle, gelled-type, valve regulated batteries.
Cyclic voltage: FLOODED 2.5 volts/cell; GEL & AGM 2.4 volts/cell. 2.6 volts/cell for 36 & 48 volt batteries. May be preset to customer's specification for battery type.
Not intended for use as a DC power supply.
Continuous - 100% duty cycle.
Low voltage start: will start charging a deeply discharged battery with terminal voltage less than 4 volts.
Reverse polarity and short circuit proof.
Aluminum case.
AC Input 115/230 volts, 50 or 60Hz Input voltage autosensed.
20 AMPS
24 Volts
10"W x 7.5"H x 3"D
6.5 lbs

BTT

BTT and knocked off a few bucks.