EG4 Power Pro battery resistance info

On the Sol-Ark 15k battery setup discharge tab it asks for Battery Resistance. I can’t find that in the specs for the EG4 Power Pro batteries or the EG4 LL V2 batteries. It’s not in the manuals.

Anyone know where I can find the answers? Top right in the picture

I found the answer in the QC (quality control sheet) from the factory. It’s 7.55 on one battery, 7.83 on the second, and 7.09 on the third. So with that information what number should I put in the discharge tab setup? Should I do an average?

To be completely transparent and honest with you, I'm not sure if you are supposed to go with the highest, lowest, or average resistance when inputting this setting. My knowledge on Sol-Ark systems is pretty limited, and the discharge resistance is handled by Closed loop communication in our systems, so the setting isn't manually input.

I'm going to look into this some more though, because I am curious about it, and I think having an answer is more important that just being ignorant of how to set this up. Sorry I wasn't much help, but I intend to come back with an answer ASAP.

Use a parallel resistor calculator, it's a slightly complicated formula.

For 3x 7 milliohm I get 2.3 milliohms. Wait is that just 7/3? So do you average them and then divide? Who cares we have the internet now.

hwy17 said:

Use a parallel resistor calculator, it's a slightly complicated formula.

For 3x 7 milliohm I get 2.3 milliohms. Wait is that just 7/3? So do you average them and then divide? Who cares we have the internet now.

Parallel Resistor Calculator

Find the equivalent resistance of a parallel circuit with the parallel resistor calculator.

www.omnicalculator.com

Click to expand...

thanks 2.5 is what I get using the calculator and the actual battery numbers

and for my rack of 6 EG4 LL V2 batteries (backup or reserve power to my wall batteries) I get 1.9 m ohms using the calculator and the actual numbers from the QC sheet.

Why not set it up in close loop. The Power Pro has the Solark protocol

The internal resistance is 7.5 ohm, and the range should be 5~10 ohm

Markus_EG4 said:

The internal resistance is 7.5 ohm, and the range should be 5~10 ohm

Click to expand...

I have the master battery set to sol-ark protocol and they are in communication with the inverter. I just want to out the correct information in all of the boxes on my inverter. I found the resistance for each battery on the QC (quality control sheet) from the factory. It’s 7.55 on one battery, 7.83 on the second, and 7.09 on the third. So with that information what number should I put in the discharge tab setup? Should I do an average? Tue calculator I used is considering the 3 in parallel as one big battery (just like the inverter).

muaddib721 said:

I have the master battery set to sol-ark protocol and they are in communication with the inverter. I just want to out the correct information in all of the boxes on my inverter. I found the resistance for each battery on the QC (quality control sheet) from the factory. It’s 7.55 on one battery, 7.83 on the second, and 7.09 on the third. So with that information what number should I put in the discharge tab setup? Should I do an average? Tue calculator I used is considering the 3 in parallel as one big battery (just like the inverter).

Click to expand...

If you have the master set up in close loop you dont even need to enter anything the BMS will handle all of the Info the inverter requires