• Have you tried out dark mode?! Scroll to the bottom of any page to find a sun or moon icon to turn dark mode on or off!

diy solar

diy solar

EG4 6000XP EPS overload issue

pcfriend

New Member
Joined
Jun 26, 2022
Messages
28
I have 2 6000 XP's in parallel eg4 electronics looked into and reconfigured the inverters which appeared to be an issue with paralleling the inverters. The inverters keep going into eps overload which causes the grid to kick in to power the loads and stops the solar from contributing to the loads. This behavior is exactly opposite of why I set this solar project up. I have 6600 watts of solar and 3 11.4 kwh of battery. Today I was pulling 5000 watts from PV and my batteries are fully charged when one of my AC's start running and load exceeds 6000 watts it goes into standby and fully runs off the grid and since there is no place for the solar energy to go because the batteries are fully charged the solar array stops producing until the loads drops below 4000 watts. So I believe these inverters is not able to handle 12,000 watts in parallel. I've attached screen shots of this behavior to try to show the progression of my issue and I have never seen the eps lines go over 3000 watts each together.
 

Attachments

  • 2024-05-22 (1).png
    2024-05-22 (1).png
    319.6 KB · Views: 31
  • Screenshot (14).png
    Screenshot (14).png
    627.9 KB · Views: 31
  • Screenshot (15).png
    Screenshot (15).png
    627 KB · Views: 29
  • Screenshot (17).png
    Screenshot (17).png
    625.9 KB · Views: 27
  • Screenshot (19).png
    Screenshot (19).png
    625.7 KB · Views: 26
  • Screenshot (20).png
    Screenshot (20).png
    647.9 KB · Views: 29
I would make sure that setting 9 maximum discharge current is set to the amount of the max that the 2 inverters can withstand 280A
 
I think I have resolved my issue, the discharge settings were at 50 and I changed to 140 and now it seems like it working the way i expect it to work.
 

Attachments

  • Screenshot (21).png
    Screenshot (21).png
    688.7 KB · Views: 46
  • Screenshot (22).png
    Screenshot (22).png
    691.6 KB · Views: 41
@EG4_Eric I have a similar issue with 2 X 6000XP’s I have the Max Discharge Setting at 100 amps. Based on this thread I’m going to change that to 280amps. Won’t that setting propagate to both inverters?
 
you guys are AWESOME! That the answer i was looking for! the setting #9 needs to be moved to 280. Was having trouble with EPS overload kicking out at around 53% load on each inverter and couldn't figure out why; was assuming each inverter was allowing 140... but no (why not?) any way thanks for the fix!!!!
 
I have two 6000XP in parallel with 280amp discharge setting and get EPS overload trip at 6,100 watts. Can not get EG4 or the distributor to tell me what may be the problem.
 
I have two 6000XP in parallel with 280amp discharge setting and get EPS overload trip at 6,100 watts. Can not get EG4 or the distributor to tell me what may be the problem.
Could be your battery(s)

What does the monitor page look like? Does it say "Forbidden" here? Right after it trips?
Screenshot 2024-10-18 at 14-04-27 Device Monitor - Monitor Center.png
 
perhaps you do not have the inverters connected to parallel correctly.
Did you change the needed settings?
Does it show up as parallel in the EG4 monitor?
 
100 amp battery limit can't support 6kw ( would be 5320W from the last image posted and likely less when the surge happens as the voltage will drop ). You need more batteries to get the full potential of what your inverters are capable of it would appear?
 
It doesnt appear that the bms is complaining tho.

The bms is reporting the limit as sent by the battery itself, 100 amps isn't enough for full output of a single inverter, let alone a pair and in closed loop communications, the inverters always limit to the values provided from the battery.
 
Could it be the BMS limit discharge is 100 amps? Even though there is a second 100 AH battery connected to the DC bus, but it doesn't have communication capability.
 
Could it be the BMS limit discharge is 100 amps? Even though there is a second 100 AH battery connected to the DC bus, but it doesn't have communication capability.
Parallel battery combine output, each with their own BMS, but you have to have all battery's configured to operate in parallel and the master sums the values and forwards to the inverter is typical for closed communications. IF you have a second battery, but no communications, there is no way for the one with communications to know about the second, its state or abilities
 
You don't have enough battery.....

And the second one is not in communications with the first ( hence why BMS says 100A maximum ), but even two 100Ah batteries are no where near enough for a pair of inverters, likely will need 6 ( 100Ah each ) if one wants to utilize the pair for rated output ( especially for surges ).
 
Thanks guys. The light bulb just came on after reading your responses and when I saw the 100 amp discharge limit of the BMS. I answered my own question above, without communication from the second battery, the inverter only knows about 5300 available watts, at most. That's why I come here; to shake off the cobwebs!
 

diy solar

diy solar
Back
Top