battery voltage display

Started by twfulton, August 31, 2019, 08:10:14 PM

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twfulton

August 31, 2019, 08:10:14 PM
on my Kid mppt, the battery voltage on the lcd display is about 0.2 volts lower than my multimeter. the panel input voltages match

ClassicCrazy

#1
August 31, 2019, 09:03:44 PM Last Edit: August 31, 2019, 09:05:52 PM by ClassicCrazy
Maybe from the voltage drop on  the cables from your batteries to the Kid ?  Check all your connections .
You could also try to check the voltage drop of the cables if your meter is able to do that ( long enough leads ?)
I forget if the Kid has a voltage calibration menu but best to check the voltage drop first.
Voltage drop might be most apparent when there is a load on - so was there a load when you checked it ?

Larry
system 1
Classic 150 , 5s3p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal 24v pack , Outback 3524 inverter
 5s 135w Kyocero , 3s3p 270w Kyocera   Classic 150 ,8s2p  Kyocera 225w to Hawkes Bay Jakiper 48v 20kwh  ,Gobel 16 kwh  lifepo4 Outback VFX 3648  8s2p 380w Rec pv EG4 6000XP

Highflyer

#2
August 31, 2019, 11:52:23 PM
The Kid does have a voltage calibration.  It's in the manual on page 28 of rev 25 under the TECH menu.

Hope this helps.

Brian

The one thing is the one thing

twfulton

#3
September 01, 2019, 11:44:17 AM
no voltage drop. the voltage at the terminals in the unit is the same as the battery voltage. the only discrepancy is on the lcd display. if off, might confuse the logic of the mppt. will check out voltage calibration.

twfulton

#4
September 01, 2019, 11:58:24 AM
voltage calibration in tech fixed it. thanks
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