Different voltage reading on 2 charge controllers

ZakarumeZakarume Solar Expert Posts: 143 ✭✭
I have upgraded my solar now. I am now running a Midnite Classic 150 and a Midnite Kid.
I have set all settings in both controllers the same. I done it like the battery manufactuer said. However when both controllers are hooked up to battery bank the Midnite Kid read .3 volts higher than classic. The classic has a temp sensor installed but the kid does not. Could this be an internal issue thats needs to be fixed? Factory reset? Or firmware update? Or could it be another issue?
1460 Watts Solar @24v. 675 AH Battery Bank using 12 6v Trojan T-105. 1 Midnite Classic 150. 1500 Watt 24v Samlex Pure Sine Inverter

Comments

  • vtmapsvtmaps Solar Expert Posts: 3,739 ✭✭✭✭
    When do you see the discrepancy?   (daytime while charging, or at night)?

    If it's only while charging that would suggest that there is voltage drop in the wiring. 

    Otherwise, one of the controllers needs to be calibrated... do you have a trustworthy voltmeter?

    --vtMaps
    4 X 235watt Samsung, Midnite ePanel, Outback VFX3524 FM60 & mate, 4 Interstate L16, trimetric, Honda eu2000i
  • ZakarumeZakarume Solar Expert Posts: 143 ✭✭
    It happens both when charging and when resting. I did a check also with a multimeter. The reading were the same as classic. It is .3 higher on the Kid
    1460 Watts Solar @24v. 675 AH Battery Bank using 12 6v Trojan T-105. 1 Midnite Classic 150. 1500 Watt 24v Samlex Pure Sine Inverter
  • KentillKentill Registered Users Posts: 19
    Hi Zakarum
    i would think the Kid volts would be lower not higher because the Kid did not have a BTS. So I agree with 
    vtmaps the Kid needs calibrated. 
    Kent
    6 - 150 Watt PV, 210Ah /24V FLA Battery Bank, 2-MN-Kid CC w/WBjr and 2-MNBTS, eu2000i, eu3000i,  Samlex 1000 Watt PSW, 1000 Watt MSW,    Linux user
  • ZakarumeZakarume Solar Expert Posts: 143 ✭✭
    Yes i was thinking same also. Gonna update firmware
    1460 Watts Solar @24v. 675 AH Battery Bank using 12 6v Trojan T-105. 1 Midnite Classic 150. 1500 Watt 24v Samlex Pure Sine Inverter
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