General Troubleshooting - EG4 Community Forum

EG4 Monitor Center Missing Batteries and Not Displaying Detailed Information

usmcrtr — Mon, 18 May 2026 03:55:53 +0000

I've scoured this form and others but have been unable to resolve my issue.

I recently added a 280AH All Weather wall mount battery to an existing system. The original system consisted of a 12000xp with (2) 280ah indoor wall mount batteries. A couple months ago I added a third 280ah battery. No issues. This weekend I added the All-Weather battery and updated the inverter and all four batteries to the latest firmware I could find.

12000xp - ceaa-0709
Indoor - S02T25, Z02T11
All-Weather - S02T25, Z02T30

In the app it counts (4) batteries. Under parameters it shows (2) and identifies them as batteries 0 and 1. It show correct detailed data for batteries 3 and 4 vice 0 and 1.

On the web page under monitor it counts (2) batteries on the right and BMS Discharge limit is correct for (4) batteries (800 amps) on the left. The bottom of the page shows batteries 2 and 3 with no detailed data.

Under Configuration/Devices it counts (4) batteries and the correct battery capacity.

Wi-Fi dongle is “BJ” series and provided detailed battery data prior to the updates and addition of the All-Weather battery.
12000xp is connected to master battery via CAN port on the battery and set to Lithium removed link
Batteries CAN EG4/Lux, RS485 P01-EG4
Master battery is set to DIP 1 and original 2^nd battery to DIP 2, 3^rd indoor battery DIP 3, and All weather to DIP 4. DIP switch settings are matched to the diagram.
Battery communication is daisy chained in this same order starting with the master and ending on the All-Weather battery.

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If I only turn on batteries 0 and 1 the web site will display two batteries. Detailed data is not provided for the master but is for battery 1.
If I turn on all four batteries, 0 and 1 are not displayed. Batteries 2 and 3 are displayed without detailed data.

Peak shaving settings being ignored

gtsquires — Tue, 21 Apr 2026 18:25:13 +0000

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This system has been running for several months now and I thought it was running pretty well. Lately, it has started ignoring "Peak Shaving" settings. If you look at the settings, it should be in Peak Shaving mode from 5:30 to 8:30, am and pm. When you look at the graph, it totally ignored those settings this morning, for no reason that I can see. The load is quite low, and the batteries are charged over 90%. Yet the system just pulled from the grid as if the batteries were irrelevant. This is a pattern that started occurring recently despite having been running properly for the past few weeks. ?????????

I need help getting my EG4 System to work

Holymaniac — Wed, 15 Apr 2026 21:15:46 +0000

It has been exactly two months since installation, and I have had nothing but problems. I have worked with my installer, who has good intentions but no solutions. I have been working directly with EG4 Tech Support, who have been very kind and have a great attitude but have been unable to solve the issues. It has been escalated to R&D, but no word.
The current issues I need help resolving:
panels randomly not charging the battery. If I turn on my dryer, then the panels go from around 500watts to around 3,000 watts. This issue is apparently experienced by others and is being studied by R&D.
Also, when the battery is charged to some degree (not full) the grid will start feeding in (instead of the battery). So I spent $31,000 on this system and am still getting PG&E grid charges. It is random.
I would like to just return the entire system (GridBoss21 outdoor, and two 16 kW outdoor batteries, and 12 440 watt panels). But I don't think it is practical.
I just want it to work so that I am powered by the solar panels that also charge the batteries so they power me at night, and if panels and batteries are low then and ONLY then does the grid come in. It seems like such a simple request and what i was promised, but it has not been the case.
Can anyone help me?

Gridboss Hybride Breaker Issue

adyer1 — Sat, 11 Apr 2026 00:55:55 +0000

My Gridboss developed a problem with the Hybrid breaker. Normally when I turn off the hybrid breaker, there is no power interruption. But today I got a High Bus Bar fault and when I turned off the hybrid breaker I lost all power for several seconds and then the Gridboss tripped the power back on.

And the Flexboss 21 will not register any of my PV.

Worked with tier 1 support with no improvement today. Tried resetting/restarting everything with no improvement.

Anyone else have this issue or suggestions?

Unable to get Solar to start

fkitzmann — Wed, 08 Apr 2026 17:49:54 +0000

System Hardware - FlexBoss21, GridBoss, 23 PV panels

Symptom & troubleshooting, This is a new, recently installed system that the PV never starts up. PV panels can be configured as two banks or one complete bank. Initially tried two banks connected to PV inputs 2 & 3 where PV 2 had ~220VDC on it's input and PV 3 had ~ 180VDC. The MPPT's would never start up, i.e. no PV current pulled by inverter on either input (measured with external voltage and current meter). Also, no PV voltage displayed in any PV (1,2,3) Data, Chart, Voltage measurement. I can physically measure voltage at each PV 2 & 3 inverter input terminals but yet no voltage measured by inverter other than small accuracy related fluctuations. In knowing that this inverter has a MPPT start up voltage of 200VDC. The thought was that I was right at it's minimum so I also lowered the Start PV Voltage to 170V. Still no go. I then configured the two strings into one complete string. This now has a voltage of ~380 - 400VDC. I then transferred this to MPPT 1's inputs. This did not work any better and I still could not see any voltage on PV 1's Data Voltage measurement. I have checked all settings under the maintenance tab and everything appears correct. Even the advanced settings -

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Note that other than the above PV issue, all else appears to be working. Batteries can supply power to EPS loads & can be charged from grid.

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Eric - I can DM you with system access and other information if you want to look at it.

Device Monitor reports 100x power output

swoods — Fri, 27 Mar 2026 14:56:48 +0000

Like magic, this morning my inverter is generating 100x more power than my solar panels are providing!

No, it's just a bug in the Device Monitor online software. The logs all show the correct Watts out.

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Eg4 monitor app doesn't correctly label gridboss

Slayvus — Wed, 25 Mar 2026 15:20:47 +0000

I started the system on March 22. Monitor app doesn't updated information between gridboss and flexboss units.

Unable to re-register

Yogenstha — Tue, 24 Mar 2026 11:14:02 +0000

Unable to re-register user name after inadvertantly deleted the username.

Unable to register

Tripofsota — Thu, 12 Mar 2026 14:39:49 +0000

I've installed the eg4 monitoring app. We have a grid boss and battery system, each of which have a dongle. When trying to create an account, both dongles report as invalid SN or pin.

I'm taking that info from the stickers on the side of the dongles. Is there something I'm missing?

Unable to set up EG4 App - Unknown Error

andymadrid — Mon, 09 Mar 2026 21:29:13 +0000

so I gotta say, I am so frustrated with this app right now. And the documentation and instructions quite frankly are terrible. My installer set the system up and we brought it online yesterday. its an XP12000. we have the wifi dongle and the only way to make it work was to a local connection. I'm trying to register either using the app on my phone (iPhone) or using the browser on my Mac. I must be doing something wrong because this is really hard. Every time I'm using my cell phone, it says. UNKNOWN ERROR and wont register. When I try to use my laptop, it just doesn't do anything. I can enter all the information. It never gives me a success message. It doesn't do anything. I am at my wits end and I'm ready to throw in the towel at this point.