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EG4 14.3 kWh Indoor Wallmount Batteries – Zero Volts at Terminals on Startup

 
Batteries
Last Post by EG4 Eric 2 weeks ago
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Posts: 17
 jxnhrpr
Topic starter
August 22, 2026 3:03 pm
(@jxnhrpr)
Eminent Member
Joined: 1 year ago

In short, I would like to know:

  1. if a hard reset of each battery using the pinhole ‘Reset’ button could solve my problem, and
  2. the right steps to perform the reset?

My system is at a remote, off-grid site with no internet or cell service.

     1, EG4 6000XP

     2, EG4 14.3 kWh Indoor Wallmount batteries

   10, Aptos 440W monofacial panels (2 x 5s)

The inverter and batteries have been working fine for about 8 months and very limited use. When needed, I have recharged the batteries directly with an EG4 Chargeverter and portable Honda generator. I recently finished installing the panels and wiring, and the system appeared to be functioning normally for about two hours (i.e., batteries charging/discharging and the inverter supporting small loads). At that point, I completely shut down the system per the EG4 manuals to rearrange the 2/0 battery cables connecting the batteries and the inverter. When I restarted the system, the batteries appeared to boot up normally (no alarms), but the inverter was reporting zero voltage from both batteries and a ‘00’ warning code. I then measured zero volts at the battery terminals of both batteries.

I then realized that my moving of the cables changed the battery DIP switches to battery IDs of 61 and 62. I tried to restart the system with the battery DIP switches set to ID=1 (master) and ID=2 (parallel battery), but it had no effect. Stumped for the moment and needing to go home, I shut everything down and left.

A little research has me thinking that starting the system with incorrect DIP switch settings caused the BMS’s to shut down battery output. Also, I might be able to fix this problem with a hard reset of the BMSs using the recessed button below the ‘Reset’ pinhole on top of each battery. Can you confirm this might work? Or do you think I blew fuses or seriously damaged something?

If you think the reset might work, please provide some clarification about doing it. The manuals are vague on the subject. My idea was to reset each battery as follows:

  1. 6000XP shut down with battery circuit breaker OPEN.
  2. Battery BMS off and circuit breaker OPEN.
  3. Disconnect all communication cables to the battery.
  4. Set the DIP switches all ON (ID=64, as it came from the factory).
  5. Insert a rigid stick/pin in the Reset pinhole and press the button.

I could use some clarification on the DIP switch settings, how long to press the Reset button, and how the BMS responds when you do a ‘hard’ reset.

BatDsply.pdf

7 Replies
Posts: 29
 Frugal Farmer
August 23, 2026 12:38 am
(@frugal-farmer)
Eminent Member
Joined: 2 years ago

SS informed me I will need to put the parameter listing as "lead/acid" batteries since I am not using lead/acid but they are Lithium from an alternate manufacture they sold for a while. Do your batteries communicate with the inverter totally? If not, what's your battery type setting at?


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1 Reply
 jxnhrpr
(@jxnhrpr)
Joined: 1 year ago

Eminent Member
Posts: 17
August 23, 2026 6:16 pm
Reply toFrugal Farmer

@frugal-farmer. My EG4 batteries usually communicate fine with my EG4 6000XP inverter, and I have been operating in closed-loop communications mode. I think (hope) my problem has more to do with proper rebooting steps.


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EG4 Eric
Posts: 1215
 EG4 Eric
Admin
August 27, 2026 7:42 pm
(@eg4eric)
EG4 Online Support
Joined: 2 years ago

@jxnhrpr

The batteries need to be set to ID 1 and ID2 and have the BMS reset. Just pushing the power button off then back on. 

Are you getting voltage on the end of the cables when it's connected to the inverter?


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1 Reply
 jxnhrpr
(@jxnhrpr)
Joined: 1 year ago

Eminent Member
Posts: 17
August 28, 2026 5:07 am
Reply toEG4 EricEG4 Eric

@eg4eric 

Yes, I tried to reset them to ID=1 and ID=2, but I think the steps I followed weren't quite correct. I was getting 0V at the inverter's BAT+ and BAT- posts and 0V at both battery's terminals.

When I realized my battery DIP switch setting were wrong, the steps I followed were:
• Completely shut down the 6000XP and opened its battery breaker.
• Turned both battery BMSs off and opened their breakers.
• Verified all battery power connections were good and correctly polarized.
• Set the master battery to ID 1 and the slave battery to ID 2.
• Made sure all communications cables were connected correctly.

I then used the routine start-up procedure described in Section 13.1 of the 6000XP User Manual:
• Closed the battery breaker on the front of the 6000XP.
• Closed the master battery's circuit breaker, pressed its BMS silver button, and paused for 5 seconds.
• Closed the slave battery's circuit breaker, then pressed its BMS silver button.
• Finished turning on the inverter.

There was no change. Still 0V at the battery terminals, but the LCD and LED displays on the battery are normal (see the pdf file in my first post). Also, the inverter says 0V from the batteries.


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EG4 Eric
Posts: 1215
 EG4 Eric
Admin
August 28, 2026 8:06 pm
(@eg4eric)
EG4 Online Support
Joined: 2 years ago

@jxnhrpr
Are you able to share some pictures of the connections on the batteries at the inverter and on the batteries? I can begin to make a ticket and have someone reach out to you if you'd like to help troubleshoot this issue.

 


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1 Reply
 jxnhrpr
(@jxnhrpr)
Joined: 1 year ago

Eminent Member
Posts: 17
August 29, 2026 2:42 am
Reply toEG4 EricEG4 Eric

@eg4eric 

I attached the only photos I have handy of my battery-inverter connections, but I don't think they will help much. Pretty conventional stuff: Degsen connectors and well crimped/torqued cable lugs. 

I queried Signature Solar about my situation, and they recommended a procedure to reset the battery addresses that differed a little from one I followed. They suggested I perform the same initial 5 steps that I did (see above), but then they said to turn on the master and slave BMSs sequentially, while the battery DC circuit breakers are open (i.e., batteries are isolated except for the battery-comm cable). Then close the breakers. Then check the voltages at the battery terminals.

I can try Signature Solar’s reset procedure during my next visit to the site in about two weeks. If it fails, I can run BMS Tools V1.0 on my laptop at the site and get some battery information to send to SS or EG4. Signature Solar thought that would be reasonable. I would be happy if you or someone else at EG4 can comment on Signature Solar’s recommendation. Unless youthink it is useless, I

am willing to try it.

6000XP
Master Bat
Slave Bat

This post was modified 2 weeks ago by jxnhrpr
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EG4 Eric
Posts: 1215
 EG4 Eric
Admin
August 31, 2026 9:00 pm
(@eg4eric)
EG4 Online Support
Joined: 2 years ago

@jxnhrpr
Yes, you can definitely try restarting the system and turning it back on the way Signature Solar mentioned to you. 

I would suggest contacting the EG4 Tech Support team at (903) 609-1988 or we can schedule a call for the next time you are onsite. That way, we can gather any information needed in real time, which should help us troubleshoot and resolve the issue as quickly as possible.


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