I've been using this Sterling battery maintainer unit for about a year now to charge my avionics back up battery (EarthX 12A). Operation has been flawless to date. I previously ran a diode resistor setup but I never really liked that due to the charge curve. The Sterling unit is more of a constant current 3A unit and charges the backup battery much quicker than the old diode/resistor setup. Great service and communication from the company as well.
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
, Email: email@example.com
, Cell: 972-746-5154
Last edited by Walt : 02-04-2017 at 07:36 AM.