Want to buy 28 volt power supply

[Glen Davis]

Does anyone have a 24/28 V power supply used to power the aircraft via the aux. power port so the avionics can be run without wearing down the battery while in the hangar that they would be willing to sell?

[Fly Boomer]

1 hour ago, Glen Davis said:

Does anyone have a 24/28 V power supply used to power the aircraft via the aux. power port so the avionics can be run without wearing down the battery while in the hangar that they would be willing to sell?

Amazon.  On the advice of a Concorde engineer, I set it to 28.2 volts.

https://www.amazon.com/Regulated-Variable-Adjustable-Accessories-Inverter/dp/B0924K3VQ5

[PT20J]

How much current do you need? My Batteryminder puts out about 5A@ 28V and runs my glass panel with minimum battery discharge.

[Fritz1]

same here I run my avionics on a Batteryminder, avionics may draw more than 5A, battery gets depleted a little, Batteryminder charges everything back up in a few hours

[Greg Ellis]

This guy made one himself. 
 

 

[Red Leader]

Here is one in Pensacola, a complete kit;

SCHAUER JAC2024H 24 volt Battery Charger Air Plane - aviation - by owner - airplane aviation parts - craigslist