Battery discharge levels
Originally Posted by dumbass
I fear you are over discharging your batteries. Long range is always great but I think long battery life in greater. The artical you are using as a reference points out exactly what I'm saying. Low discharge long life. High discharge short life. At the rate you are currently discharging those batteries you will be replacing them by the end of the year or sooner.
- 150 – 200 cycles with 100 percent depth of discharge (full discharge)
- 400 – 500 cycles with 50 percent depth of discharge (partial discharge)
- 1000 and more cycles with 30 percent depth of discharge (shallow discharge)
I am familiar w/ your bullet list however, you still provide no safe VOLTAGE for discharge---without that it is just a generality that my meter cannot measure.
REMEMBER, I am in a testing mode--I do not intend to continue to push the batteries this hard---I needed a base line to work from. So far, from the information I have been able to collect the safe discharge level for my 24 volt batteries lies somewhere between 24.4 volts and 21.0 volts---that range is simply TOO large--I need some SOLID information to go on.
I believe the following is GOOD information I can trust.
Hello Mr. Tone,
Lead Acid resting State of Charge voltages
12.65 V = 100% 25.30
12.45 V = 75% 24.90
12.24 V = 50% 24.48
12.06 V = 25% 24.12
11.89 V or less = discharged 23.78
Resting voltage is taken at room temperature and 12 - 24 hours after the completion of charging.
Using the chart above and its discharged state of 23.78 volts my range should be at + - 50.00 miles in low low gear at 8.5 MPH which is about when my yellow light came on so NOW I can use that as a REAL point of reference.
Last edited by PJIII; 04-20-10 at 07:29 PM.