I have the Silent Hektik regulator. It's very stable and electrically quiet, as it certainly should be given its price. The only thing I don't like is that it's designed for Li batteries, and steps the charging voltage up -- slowly -- from 12.7 to full voltage. That takes about 40-45 minutes in my case, so if you make a lot of short flights it may never get above the mid-13V range. I think they may make another version that doesn't step the voltage.
Now, having said that... my PC680 battery is now around 7 years old. I anticipated needing to replace it last year or this year... but it still holds about 12.6 to 12.7 V with no load. When I put it on the smart charger/conditioner, it shows it at 100% and healthy after a few minutes. It's tough to argue with that. I'm going to see about getting it load tested.
Originally Posted by pilotyoung
I would like to hear other people's thoughts and experiences with the John Deer unit?
The actual John Deere factory part isn't cheap either. Several people, myself included, have used cheap Chinese-produced clones available through Amazon and Fleabay, which appear to be identical to what NAPA sells (but I haven't checked that). Mine worked OK for a few months, then failed rather spectacularly a few minutes after takeoff one day. Like most cheap clone electronic devices, these things aren't the most robust design nor are they of the highest quality. It's a gamble.