JK BMS not allowing full voltage to bank

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wntrhwk

New Member

Joined

Jan 8, 2020

Messages

96

• Apr 17, 2024

• #1

Hello, hoping I am just missing something here. My setup, 2 x 100ah packs, in parallel. 2 x 200w panels in series. Victron controller showing at least 20amps going into bank (I have the controller set to 20a max atm). JK BMS showing maybe 10amps, avg closer to 8amps . Any ideas on where to start? Thx for the help.

 

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BentleyJ

Solar Wizard

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Jan 13, 2022

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2,886

Location

Riverside County, CA

• Apr 17, 2024

• #2

If you have 2 battery packs that implies they have separate BMS and the batteries are tied together so each battery gets about half of the 20A. If there is only one BMS then you have a single battery "pack" that is a 2P4S configuration.

 

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wntrhwk

New Member

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Jan 8, 2020

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96

• Apr 17, 2024

• #3

Hello Bently, you are correct, I have 2 BMS's. I am fairly new to solar and should have realized that the power would be split between the 2. Thx for the help and for not beating up on me, God knows I had it coming.

 

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740GLE

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Apr 30, 2021

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NH

• Apr 17, 2024

• #4

What are your victron SCC settings?

At 3.39v per cell with a delta of .004v those are doing quite well, I’d say close to fully charged and decently balanced.

 

W

wntrhwk

New Member

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Jan 8, 2020

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96

• Apr 17, 2024

• #5

740, unfortunately my system is in my RV at a storage facility. I will be making a trip out tomorrow and can get the controller settings. Thx for your response.

 

Z

zorlig

New Member

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Mar 12, 2020

Messages

218

• Apr 18, 2024

• #6

Get a dc ampmeter, hit all three lines and you'll see numbers that add up a lot better than 8+10=20.

Then learn to stop worrying so much!

 

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wntrhwk

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• Apr 18, 2024

• #7

740, here's the current SCC setup.

 

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ScrotusGobbleBottom

Solar Enthusiast

Joined

Nov 20, 2023

Messages

647

Location

Wisconsin

• Apr 18, 2024

• #8

wntrhwk said:

, God knows I had it coming.

Click to expand...

 

7

740GLE

Solar Wizard

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Apr 30, 2021

Messages

3,542

Location

NH

• Apr 18, 2024

• #9

Looks good keep using it and maybe add more solar if you find the battery’s take too long to charge.

 

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wntrhwk

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Jan 8, 2020

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• Apr 19, 2024

• #10

740, I appreciate your input and taking the time to review my system.