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Old 01-01-2019, 05:24 PM   #1
BigOL3
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Default Most accurate/true volt reading

I need some clarification on which "time" of volt reading to be most accurate.

EX .... run about 5 miles in hill and immediately check volts at 49.7 ..... couple minutes later at 49.9 ...... 20 minutes later at 50.4. Which is the TRUE reading as pertaining to the SOC of batteries?

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Old 01-01-2019, 06:05 PM   #2
Winston Ellis
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Default Re: Most accurate/true volt reading

True reading should be taken 12-24 hours after use or charge cycle completion


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Old 01-01-2019, 06:23 PM   #3
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Default Re: Most accurate/true volt reading

20 minutes later or longer at 50.4. is the TRUE reading, as pertaining to the SOC of batteries. At rest voltage
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Old 01-02-2019, 03:03 PM   #4
Fairtax4me
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Default Re: Most accurate/true volt reading

Wait until the voltage stops changing. That's your only truly accurate reading.
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Old 01-02-2019, 08:23 PM   #5
BigOL3
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Default Re: Most accurate/true volt reading

Quote:
Originally Posted by Fairtax4me View Post
Wait until the voltage stops changing. That's your only truly accurate reading.
Then I assume the current reading that you get while being used is actually less than the true reading that requires letting some time pass.

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Old 01-02-2019, 08:32 PM   #6
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Default Re: Most accurate/true volt reading

Yes sir
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Old 01-03-2019, 05:38 AM   #7
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Default Re: Most accurate/true volt reading

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Originally Posted by BigOL3 View Post
Then I assume the current reading that you get while being used is actually less than the true reading that requires letting some time pass.

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Your state of charge should not drop below 50% (and not even that far if possible). I'm told that this equates to 48.41V at rest and 42V under load.

If you have a meter that can monitor the voltage under load, stay above 42V while driving (well above if possible).

These tables have been gleaned from other members. The first one is generic while the second one is specifically for US Battery.
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File Type: png SOC US Battery SoC table.png (185.3 KB, 0 views)
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Old 01-03-2019, 10:43 PM   #8
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Default Re: Most accurate/true volt reading

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Your state of charge should not drop below 50% (and not even that far if possible). I'm told that this equates to 48.41V at rest and 42V under load.
THAT is the part I had questions about. I had already been informed to stay about 50%, but originally thought that to be while actively being used. That was before I learned of 'at rest' reading. If I understand you correctly, basically 42V while being used is about equal to 48.4V at rest.
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Old 01-03-2019, 10:50 PM   #9
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Default Re: Most accurate/true volt reading

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Originally Posted by BigOL3 View Post
THAT is the part I had questions about. I had already been informed to stay about 50%, but originally thought that to be while actively being used. That was before I learned of 'at rest' reading. If I understand you correctly, basically 42V while being used is about equal to 48.4V at rest.
That's how I understand it.
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Old 01-03-2019, 11:04 PM   #10
BigOL3
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Default Re: Most accurate/true volt reading

Been my intentions to stay above the 48V regardless, but good to know all the info.
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