Fantastic

Excellent product. No problems

it regulates

Works as advertised and at a reasonable price

works great

very nice upgrade from my old regulator

I replaced a 37-amp alternator with a new 60-amp alternator and this new voltage regulator. The new system works great. A simple upgrade with no problems.

Just what the doctor ordered.

Shipped fast (as usual) and was perfect replacement for my 76 Cherokee 235. Easy instructions. The LED is a very nice upgrade over the old Lamar unit, for troubleshooting. No settings or adjustments, either!

Replaced my 13 yr old unit that went offline. Good tech support for troubleshooting. Easy installation to get plane back up and running. A bit pricey for what it is.

Works great love the light

Easy to install and works great. Got ready of all my old delco-remy vr and ovr.

Came fast, good price and works great, cured my problem with over volting.

Perfect, plug in replacement on 1974 Cessna 150.

Great unit. Replaced same unit that had been in service since 2006. Old unit taken out by short in main lead wire. Wire replaced, new regulator installed, system back up and running. Shipped by USPS..Delivered GA to IL in 2 days!

I recently replaced my alternator and voltage regulator at the same time. I opted to go with the Zeftronics at the recommendation of other Mooney owners. I have a 1978 M20J. This VR was extremely simple to replace. The change out time took about 5 minutes. I did it myself and my A&P signed it off.

works fine, easy installation after old connector was fit.

This is my second Zeftronics unit. The first one only lasted 13 months (12 month warranty from install and no leeway from their tech support on the warranty) and it replaced a 38 year old factory installed unit that my A&P recommended replacing to see if it was the cause of my electrical problems (it was not). Lets hope this one lasts longer than 13 months!

I have had Zeftronics voltage regulators on 2 prior aircraft and they worked great. When I needed to replace the VR on my F33A Bonanza I went to them for a replacement. Zeftronics showed a STC qualified replacement so I ordered it. Only then did I find out that their regulator required 2 field wires while the stock unit only needed 1. That was more than my mechanic wanted to get into for what should be a simple fix. Working through this issue with the Zeftronics tech support also proved difficult as it was very difficult to get anyone to answer the phone. I am sure the regulator would have worked great once installed, but on this airplane the installation was more difficult than one would expect.

Good regulator, terrible customer service and support,they do not answer the phone,they do not return calls left on voice mail, I wonder if they will warranty their product?

I never leave comments. But we I have ordered four or five of them in the last year. Three of them have not worked. Not worth your time and effort