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EG4 Indoor/6000XP -- 5% difference in SOC during use? but similar voltages?

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dfw_dude

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Enjoying my setup so far -- 6000xp + 2X EG4 Indoor batteries. Not a critical issue, but curious why the SOC between batteries would be off by 5% despite being used equally?

Voltage is within 2/100's of each other. (screen shot attached of full readout of BMS info off their app)

only 27 cycles on the system so far -- would SOC equlization be something that's more lined up when the batteries are topped out? I don't go under 20% SOC.

Thanks :)
 

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Can you show picture of how you connected the batteries?

Did you connect one battery (both terminals to the inverter), then parallel the second battery to the first?
 
DIYPV said:
Can you show picture of how you connected the batteries?

Did you connect one battery (both terminals to the inverter), then parallel the second battery to the first?
Click to expand...

yes - setup per the manual from section 5.2 "additional configurations". They use the 18kpv unit as an example, but it's the same for 6000xp (only with a single set of +/- terminals on the inverter.

no performance issues, or warnings, or really any issues except noticing in the data/stats. I have noticed as the system recharges back up towards 70-80-90% the difference in reported SOC% goes down and they sync back up it seems.

At work so I can't really snap any pics sorry.
 
Battery SOC is usually determined by integrating amps going in/out of the battery over time.
It's common for SOC of two identical batteries to drift apart due to slight differences in capacity.

In any case, and even more importantly for LFP, voltage behaviour is the more fundamental measure of whether a battery is charged/discharged.
I.e. the extremes of charge cycles
 
I have a similar issue but I am using 2 6000XP with 2 indoor units. Cycle count is different. They were perfectly balanced when I set everything up.
1719839865928.png
 
I have same issues on 4 batteries... They can vary like 7%... I also get to 100% SOC, but they're only like 53.4v... are you guys getting to 56v?
 
orion7144 said:
@EG4_Jared can you help with this? Is there a battery firmware update?
Click to expand...

Updating to the latest RS232 firmware will resolve the cycle count issue. Meanwhile, I am investigating the percentage/voltage discrepancies reported by you and others. Please DM me your system details as I look into this matter.

EG4® WallMount Indoor 280Ah Lithium Battery - EG4 Electronics

The EG4 WallMount Indoor Battery features a built-in 200A BMS, integrated 600A busbars, and an on-board LCD touchscreen to ensuring a safe and efficient system.
eg4electronics.com eg4electronics.com
 

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EG4TechSolutionsTeam said:
Updating to the latest RS232 firmware will resolve the cycle count issue. Meanwhile, I am investigating the percentage/voltage discrepancies reported by you and others. Please DM me your system details as I look into this matter.

EG4® WallMount Indoor 280Ah Lithium Battery - EG4 Electronics

The EG4 WallMount Indoor Battery features a built-in 200A BMS, integrated 600A busbars, and an on-board LCD touchscreen to ensuring a safe and efficient system.
eg4electronics.com eg4electronics.com
Click to expand...
I only have a R485 USB to RG45 Can I use that with pins 4 and 5?
 
can DM my details in the AM when I get home -- I'll have to look into how to upgrade my battery firmware as I'm seeing discrepancies in the cycle count now (off by 2 or 3 I think now)
 
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