EG4 3kw AC power issue

[Operation DeltaPro]

I recently purchased an EG4 3kw off-grid inverter with an Eco-Worthy server rack battery (51.2v) and just set it up today. It seems to be working fine, but when I plug it into an outlet it keeps flashing Code #10 and shuts down. The inverter is in my shed with lots of circulating air so it's neither hot nor humid, but because of this fault I cannot charge my battery ( this is my backup power system) which is at 29%. I have tried reprogramming my EG4 from manual to auto without success and needs assistance.

Also, the EG4 keeps flashing "P" on the screen for parallel which I've tried changing to single phase without success...according to the manual the code #10 refers to "output derating".

 

[aussiesam]

why is your AC input 89volts?
I believe you can get rid of the P by having 2 sources of power, such as solar and battery, or battery and grid, turning off the AC inverter and then going into the settings to put it in single phase mode

 

[timselectric]

Yes, input voltage is too low.

 

[Operation DeltaPro]

why is your AC input 89volts?
I believe you can get rid of the P by having 2 sources of power, such as solar and battery, or battery and grid, turning off the AC inverter and then going into the settings to put it in single phase mode

That's what I'm try to figure out...when plugged in it starts at 120v, then it will bypass battery and drops to 89v in a matter of seconds causing the #10 warning to flash.

I've plugged into several outlets only to get the same issue. I double-checked my AC IN connection to ensure nothing is loose or mis-wired.

Also, in setting #28 each time I attempt to set it from PAL to SIG it won't accept the change...what am I missing?

 

[timselectric]

That's what I'm try to figure out...when plugged in it starts at 120v, then it will bypass battery and drops to 89v in a matter of seconds causing the #10 warning to flash.

Sounds like you are seeing a pretty high voltage drop. Source wiring may be too small.

Also, in setting #28 each time I attempt to set it from PAL to SIG it won't accept the change...what am I missing?

You have to change this setting while the power switch is off.

 

[Operation DeltaPro]

Sounds like you are seeing a pretty high voltage drop. Source wiring may be too small.

You have to change this setting while the power switch is off.

I was able to change the setting #28, thanks.

As for the voltage, I tried plugging in the inverter (with the battery off) and the current remained at 120v without issues for several minutes.

It seems to have problems when I have the battery itself on and AC plugged in...

I also noticed that while checking my battery status on the app it show red on Cell #1 and amber on Cell #13, could this be the culprit?

 

[Operation DeltaPro]

Sounds like you are seeing a pretty high voltage drop. Source wiring may be too small.

You have to change this setting while the power switch is off.

I was able to change that setting, thanks...still working on the other issue.

As for the voltage, I tried plugging in the inverter (with the battery off) and the current remained at 120v without issues for several minutes.

It seems to have problems when I have the battery itself on and AC plugged in...

I also noticed that while checking my battery status on the app it show red on Cell #1 and amber on Cell #13, could this be the culprit?

 

[timselectric]

As for the voltage, I tried plugging in the inverter (with the battery off) and the current remained at 120v without issues for several minutes.

That's because charging the battery pulls enough to drop the source voltage.
You either need a larger source circuit/wiring or lower the charging current.

I also noticed that while checking my battery status on the app it show red on Cell #1 and amber on Cell #13, could this be the culprit?

That's just identifying the highest and lowest cell voltages.
Which looks fine.

 

[EG4TechSolutionsTeam]

I recently purchased an EG4 3kw off-grid inverter with an Eco-Worthy server rack battery (51.2v) and just set it up today. It seems to be working fine, but when I plug it into an outlet it keeps flashing Code #10 and shuts down. The inverter is in my shed with lots of circulating air so it's neither hot nor humid, but because of this fault I cannot charge my battery ( this is my backup power system) which is at 29%. I have tried reprogramming my EG4 from manual to auto without success and needs assistance.

Also, the EG4 keeps flashing "P" on the screen for parallel which I've tried changing to single phase without success...according to the manual the code #10 refers to "output derating".

Would you be able to share some photos of the wiring on your inverters?

 

[marionw]

You can also lower the Max Charging Current setting (page 59?) to a low value and then slowly increase.
How is you inverter AC input connected? Are you simply plugging it into a 120vac outlet and if so are there other loads on the circuit?

 

[Operation DeltaPro]

Would you be able to share some photos of the wiring on your inverters?

Here are the wiring pics, I made sure that all wiring are tight. I don't have my PV connected to anything at the moment because I don't have enough solar power to make it useful yet.

 

[Operation DeltaPro]

You can also lower the Max Charging Current setting (page 59?) to a low value and then slowly increase.
How is you inverter AC input connected? Are you simply plugging it into a 120vac outlet and if so are there other loads on the circuit?

I dropped it down to 50 on the Charging Current (according to Eco-Worthy manual) without success. It is being plugged into a 120v outlet both with and without loads (I have one outlet near my pool which was installed during construction), and has used heavy duty extension cord just to try powering the system which is inside my shed...still no luck.

 

[Q-Dog]

50 amps battery charging current is likely over 2000 watts. That cord is only rated for 1600 watts. You probably should lower battery charging current to 30 amps (which would pull about 12 amps from the wall plug).

 

[Operation DeltaPro]

50 amps battery charging current is likely over 2000 watts. That cord is only rated for 1600 watts. You probably should lower battery charging current to 30 amps (which would pull about 12 amps from the wall plug).

Tried 30amps using my EcoFlow Delta Max (without any other connections) showing it still pulling over 2130watts...gonna change some other settings and see if that makes a difference.

 

[timselectric]

I would lower charging current to the lowest setting. And gradually raise it while watching the input voltage and temperature of cord.

 

[aussiesam]

Tried 30amps using my EcoFlow Delta Max (without any other connections) showing it still pulling over 2130watts...gonna drop down to 20 and see if that makes a difference.

Wait.. you are charging from an ecoflow? ... Do you have a proper Ground-Neutral bond?.. because if not, that inverter could be reporting the wrong voltage / causing that issue

 

[timselectric]

Wait.. you are charging from an ecoflow? ... Do you have a proper Ground-Neutral bond?.. because if not, that inverter could be reporting the wrong voltage / causing that issue

Good thought, but that inverter doesn't look for, or even care if the AC input has a ground.

 

[Operation DeltaPro]

Good thought, but that inverter doesn't look for, or even care if the AC input has a ground.

I only used the EcoFlow once after trying other settings just to see if it made any changes (which it didn't). Everything I've been trying since yesterday has been from home outlet.

 

[EG4TechSolutionsTeam]

Here are the wiring pics, I made sure that all wiring are tight. I don't have my PV connected to anything at the moment because I don't have enough solar power to make it useful yet.

Thank you for the pictures. Have you measured with a voltmeter or multimeter to make sure you are getting 120V on both the AC input and AC output?

 

[Operation DeltaPro]

Thank you for the pictures. Have you measured with a voltmeter or multimeter to make sure you are getting 120V on both the AC input and AC output?

Sorry for late response (was sick thanks to this crazy weather)...

I did and was (momentarily) getting the 120v in, but watched it started dropping like it does previously. I'm going to order a heavy duty (10-guage) 10ft. extension cord and replace the input cord I have installed. The cord is supposed to be heavy duty, but I think you guys are right about possible too small a wiring so I'll be doing that in a few days...will post the results.

 

[Operation DeltaPro]

Update:

You guys were right about the cabling gauge…

I thought the cable I installed was 10 gauge, but apparently it was not. I replaced it with an extension cord with 10 gauges and now it charges with no power degradation now!

Now that that problem is resolved, I can focus on the other two issues:



1.) Open ground when off-grid and,



2.) Red light on Cell #1 in my Eco-Worthy 48v 100ah battery!



I was able to charge my battery up to 99%, and while checking its status during charging it constantly remains RED…

I wouldn't be concerned if it changed after charging (like the others do once unplugged), but this has been red since the day I received my product and it hasn't changed since...

 

[timselectric]

2.) Red light on Cell #1 in my Eco-Worthy 48v 100ah battery!

Red is the highest voltage cell,and yellow is the lowest voltage cell.
Red doesn't mean bad.

 

[timselectric]

1.) Open ground when off-grid

I don't think that your inverter has the option to create the ground.
The easiest solution is to add a jumper between the input neutral terminal and the output neutral terminal.
This makes it a common neutral setup.

 

[42OhmsPA]

Tim's got you covered.
I'd be very satisfied with the balance of those cells at that voltage.

 

[John O]

I don't think that your inverter has the option to create the ground.
The easiest solution is to add a jumper between the input neutral terminal and the output neutral terminal.
This makes it a common neutral setup.

I asked the grounding question of Signature Solar a few weeks back and here is their reply:

"From: Trevor Wooden <tech@signaturesolar.com>
Date: 1/27/2025, 9:15 AM
To:
Hello,
Thank you for reaching out. The Eg4 3000 is the only Eg4 inverter that does not have a ground neutral bond se􀀁ng
that can be enabled or disabled. The 3000 has a dynamic bond that switched based on the power source being used.
When the unit is using PV or ba􀀂ery to power loads the internal bond is connected and when the unit is using grid
input to power load the internal bond is disconnected. Typically RV shore power is bonded so the unit disonnec􀀃ng its
internal bond when using this as grid input will avoid being double bonded. The RV load panel typically will not have a
ground neutral bond so the unit crea􀀃ng a bond when using PV or AC power would be ok as it would not be using the
shore power bond at the same 􀀃me.
The only way to fully remove the bond from the inverter would be to remove the ground neutral bonding screw but it
is important to keep in mind that an electrical system must have at least but no more than one bond at any given
􀀃me."


I just ordered my EG4 3000ehv-48 for use in my camper. The grounding was important to me.