DPI charger run time?

[Night life]

After resting all night, my batteries read the following:
8.42
8.37
8.40
8.42
8.36
8.40

[teecro]

Originally Posted by Night life

After resting all night, my batteries read the following:
8.42
8.37
8.40
8.42
8.36
8.40

Ok the sad part here is after being on a charger for least half a day and an overnight rest those voltages are only showing an 80 to 90 percent state of charge, whereas well taken care of batteries would be holding better than 8.4 to 8.5 volts. I'd take the cart out for some uphill test runs with the voltage meter hooked up to one battery at a time to see if you get one or more than rapidly fall to 7 volts or more, these would be weak and/or bad batteries...

The 17 Amp Smart DPI Charger is a very good and very well liked charger...

Added the DPI Charger PDF...

[Night life]

Originally Posted by teecro

Ok the sad part here is after being on a charger for least half a day and an overnight rest those voltages are only showing an 80 to 90 percent state of charge, whereas well taken care of batteries would be holding better than 8.4 to 8.5 volts. I'd take the cart out for some uphill test runs with the voltage meter hooked up to one battery at a time to see if you get one or more than rapidly fall to 7 volts or more, these would be weak and/or bad batteries...

The 17 Amp Smart DPI Charger is a very good and very well liked charger...

Added the DPI Charger PDF...

I'm in south Florida, there are no uphill runs!

I am going to clean terminals, top off with water and try one more charge. If nothing changes I will go with a new set of t875s... the issue is going to be compounded with a 500amp controller and executioner that I will be installing shortly.

[jjance]

Did it ever auto shut off?

[mrgolf]

You have it under control

[teecro]

Originally Posted by Night life

I'm in south Florida, there are no uphill runs!

In that case load it down with several friends...

[Golf cart guy]

The problem I find with the DPI is the amp rate is right at the edge of enough to charge a deep cycle battery. His battery readings are close to perfect, but are not equal. Hence the reason to charge it with the other charger first in an effort to get the voltages up and then have the DPI be able to keep it there in normal use.

[mrgolf]

Originally Posted by Golf cart guy

The problem I find with the DPI is the amp rate is right at the edge of enough to charge a deep cycle battery. His battery readings are close to perfect, but are not equal. Hence the reason to charge it with the other charger first in an effort to get the voltages up and then have the DPI be able to keep it there in normal use.

Please explain. My DPI has a higher amp output than my PD 2.

[jjance]

Please explain. My DPI has a higher amp output than my PD 2.

A DPI charger doesn't have any equalization mode. Equalization requires higher voltage (63v) and higher current (10-15amps) for several hours. A DPI voltage will rise up to about 63v at the end of the charge cycle but the current will be so low (about 2 amps) it won't do any good. Plus it only lasts for 20 minutes.

Now if you connect your old PD charger with the relay bypassed it will run up to the max voltage out @10 amps. This will equalize your batteries. This is one time that 65v is good. Normally it should be down around 58V. Only problem is that you have to time it because it won't shut off automatically.

[teecro]

Originally Posted by mrgolf

Please explain. My DPI has a higher amp output than my PD 2.

Sometimes I wonder if we quibble over kibble?

According to Trojan:
1. When do I need to perform an equalization charge?
Equalizing should be performed when a battery is first purchased (called a freshening charge) and on a regular basis as needed. How often this might occur with your battery will vary depending on your application. You will need to monitor your battery voltage and specific gravity to determine when equalization is needed. For example, it is time to equalize if the measured specific gravity values are below manufacturer’s recommended values after charging (recommended value for Trojan Deep Cycle batteries is 1.285 +/- .007 at 80º F (27º C)). Equalizing is also required if the specific gravity value of any individual cell varies 30 points or more. In addition, reduced performance can also be an indicator that equalizing is necessary. Equalization should be performed when individual battery voltages in a battery pack range greater than 0.15 volts for 6-volt batteries or 0.30 volts for 12-volt batteries.

The biggest variance here is 0.06 volts and if one calculates for an 8-Volt battery this allowance would be 0.225 volts which is almost 4 times more than the largest number in his spread...

But the batteries still should not be throwing off such heat though...