[Kopfjaeger]

I have a Powermaster 1 wire CS-130 alternator on a serpentine set up. Mark from MAD Enterprises suggested using it as a 3 wire. I took his suggestion, added the plug that sees battery voltage on the large gauge wire and added a resistor to the smaller grey wire. Since I don’t have an idiot light, the resistor was needed. With the engine off and key on run, I have 12.5v on the 10 gauge wire and 11.80v on the grey. When running, the alternator is putting out 14.7 volts. Is that too much? There is another recent thread that said, high 14v can over charge and damage your battery.

Joe

 

[dyno jonn]

14.7 is the highest voltage needed to charge a partially discharged battery. If it doesn't drop down after driving a while I'd start looking for problems. Don't panic just yet though.

 

[Coppertop]

If there's more then 1 wire connected to the alternator, then it's not wired as a 1-wire alternator....



Higher then 14.8 and you run the risk of "boiling" the battery from over-charging.

 

[RICH1965]

I would just run it and see how it works before getting all carried away, especially if your battery is under warranty. I think most alternators charge at 14.4 Volts if I remember correctly. I have Dual 320 amp alternators in my chevelle.

 

[jeff swisher]

I had 14.7 volts for many years measured with a Fluke 87 at the battery terminals.
It never went any higher even at 6500 RPM.
My old lead acid battery lasted 7 years.
I drove it daily.
I built another Internal regulated GM for the wife's Ford Escort and it put out the same 14.7.
No issues with that and those blinkers were much faster and lights were brighter.

 

[Bob Tiley]

That is perfect voltage for an AGM battery. If your battery needs replacing in the next couple of years get the AGM version and it will be perfect.

 

[LeoP]

Before all this "Technology", the charging voltage range was 13.8 to 14.2 volts. I think today's range is up to 14.7!!

 

[Badd64]

Powermaster set mine at 14.8