Trying to test the internal resistance of a Renogy12v200AH battery.. Please help!

[waywaynorcal]

I fear a battery might be failing and Renogy wants a photo of an internal resistance test on my Renogy 12v 200ah battery. I bought a tester a Konnwei KW 208
I am having trouble in the settings part of the tester. I don't know what number to input in the "SET BATTERY RATING" and which standard to input the number to.
The Select Standard page is 1.CCA (cold cranking amps) 2 IEC internal electron technical commission standard 3. EN European automobile industry association standard 4. DIN German Auto Industry Committee Standard 5. CA Cranking amps standard, effective starting current value at 0 degrees C. 6. BCI Battery Council international standard. 7.JIS Japan Industrial Standard 8. MCA Marine Crakning Amps standard O degree C 9. SAE Society of automotive engineers standard.

Any help with this would be much appreciated. Getting Renogy on the phone is an absolute chore.
Whatever the standard setting is determines the correct input from whatever my battery is. If that makes sense?
In the first test I put in the CCA with a number of 2000A. I assume that is incorrect?
below is a photo of the screen of the tester and the specs on the 200ah battery

 

[mopat]

Isn't the internal resistance 4.9 milli

photo of an internal resistance test

ohms?

 

[waywaynorcal]

yes in that test but I just put in an arbitrary number in the initial settings just to see what it would do. I dont know what standard I am suppose to be using for this type of battery. No idea if it suppose to be CCA or what.. like the list listed in the first post
Basically what i need is what STANDARD to use from the list above and what NUMBER to input.

 

[RCinFLA]

The resistance of the internal BMS series MOSFET's is likely about two to three times the sum of four series connected cells, if cells are good.

Likely total with BMS is 4 to 6 milliohms, 0.4 milliohms x 4 cells + 3 to 3.5 milliohms for BMS, ballpark number.

 

[mopat]

Renogy 12v 200ah battery

This is an AGM deep cycle battery. Select Standard 1

 

[waywaynorcal]

This is an AGM deep cycle battery. Select Standard 1
View attachment 71484

THANK YOU!!! It then asks on the next screen "set battery rating" it is a 200AH Is that the number rating the tester wants? It allows you to set a number between 100A and 2000A and the setting listed below. It is a hybrid Gel but I'm not sure if that is the setting the tester requires?

 

[mopat]

Is that the number rating the tester wants?

No, 200 is amp hour rating of battery capacity.

Tester is looking for Cold Cranking Amps (CCA) in your photo.

I would think this should be 2000 amps per the battery spec sheet:

 

[IsaacFarrell]

Hi! I am also having some odd problems with my 200 amp hour deep cycle AGM Renogy batteries. I have an 800 watt solar system and three batteries. I just ordered the same tester that you did (the Konnwei KW 208) and I'm going to perform the internal resistance test to send in to Renogy. Did the answers you received answer all of your questions? Did everything work out okay?