New Trojans only charging to 50.4

[DIRTPIT HC]

And just so we're clear. Was the 50.4 v right as the charger cut off or after the batteries rested 12 hrs?

[1970buick]

After a day of rest.

[1970buick]

Originally Posted by cgtech

You have a original "yamaha spec" DPI charger. It has 3 features uncommon to a dpi charger. 1, it has a relay, and does not float charge batteries. 2, it has no ammeter. 3, it can be a 36v, or 48v charger by changing the mode. Your charger has to be opened up to change modes. If you are certain that the voltage went no higher than stated above, you may want to switch to the USBattery mode and try that while monitoring maximum voltage reached.

Interesting info. Where/how do I make the switch once the unit is opened?

[cgtech]

Heres my cheat sheet. Jumpers "J3" & "J4". If mode 1 is needed, its ok to "store" the unused jumpers "halfway" on the pin headers.

[1970buick]

Originally Posted by cgtech

Heres my cheat sheet. Jumpers "J3" & "J4". If mode 1 is needed, its ok to "store" the unused jumpers "halfway" on the pin headers.

LOL. Figured it wouldn't just be a switch. I am going to give this a shot this weekend. I have a 48v cart and the charger goes up to 67v at one point during the charge. Is that bad?

[cgtech]

Very bad in my opinion.

[1970buick]

Update. I had an older charger below in the garage and tried it out. The peak voltage during charging was about 58v. It charged longer than the dpi unit and the cart is at 52.3v after 5 hours rest. Will check again at 12 hours.

[cgtech]

That MAC charger is a good charger as well. It uses a nice 5-stage charge cycle like is common nowdays. If your other charger is hitting 67v, use the MAC till you get it figured out. That charger was standard equipment on all G19, G22e, and very early '07 drives.

[1970buick]

After about 14 hours the pack has a charge of 51.2v after using the "MAC" charger.