EG4 6000XP output with microinverters

[veonix84]

This might be a bit of a stretch but I have a storm coming and was considering this as an option.

I have an EG4 6000XP running 2 circuits with 3.6kwh of battery backup and a 2kw grid tied Enphase system on my patio roof.
No panels on the EG4, btw.

Is it possible for the Enphase micros to sync to the EG4's grid and supplement the output?

I understand it won't charge the batteries and should be disconnected from the main grid.
Mostly just don't want to confuse or damage the EG4.
I am able to setup a low power test with an iq7 micro and 24v battery.

 

[timselectric]

It's tricky (not recommended) and requires much babysitting.
But IF  you can keep the grid-tied system from sending any power to the 6kxp, you'll be fine.
But that's a big IF. because any power sent into the load side of the AIO will either (best case) throw an error and shut it down. Or (worst case) cause damage to the AIO.
what I mean by keeping it from sending power into your AIO. Is that your loads must use everything produced by the Enphase system.
EVERYTHING!!!

 

[veonix84]

thanks for your reply.
that makes sense.
I would expect it to be shunted somehow but if the voltage from the micros is higher than the inverter, the power has to go somewhere.
I'll consider adding solar input to the EG4. Just not a fan of high voltage DC.

 

[EG4TechSolutionsTeam]

What firmware version is the 6000XP running? With version 190D0E, AC coupling is supported on the 6000XP. I recommend using the grid profile "AC Coupling FW83pct/Hz 100w REC300s: 1.2.1" when AC coupling with Enphase. While this won't increase the output, as it will still be limited to 6000W continuous, it can be configured to charge the battery via AC coupling with the 6000XP.

https://eg4electronics.com/wp-content/uploads/2024/09/EG4-6000XP-System-Wiring-Diagrams.pdf

 

[veonix84]

Thank you for you the info.
This is very interesting to me.
I just updated my device to 190DOE after you mentioned.

Even if the 2kw ac input only goes to charging and driving circuits, I can make very good use of that.

let me test it out with a small load like a single iq7.

 

[veonix84]

The new options were there after updating and I was able to configure and enable AC Coupling and charge with my Enphase setup.
Power has been restored and I'm considering going with DC charging for the EG4.
I disabled coupling and removed put the Enphase back to my main panel.

After the update, I found that I can't to enable AC charging.
Tried resetting all settings, reducing the charge voltage.
Batteries ran out so I had to recharge them manually.

Is there a configuration requirement I'm missing with 190DOE for AC Charging?

 

[EG4TechSolutionsTeam]

Could you send me the serial number for this inverter? I would like to take a look.

 

[veonix84]

Thanks. Sent you a DM.
I am using LiFePo4 batteries from Battery USA.
They have worked well but i'm only use 2 very low load circuits with the inverter.

 

[veonix84]

I am able to get the AC charging working but it's only when there is slight load on the system.
Little to no load - relay clicks on and off
20w - charges but light pulses
normal load - fast relay clicking

 

[John Schmidt]

What firmware version is the 6000XP running? With version 190D0E, AC coupling is supported on the 6000XP. I recommend using the grid profile "AC Coupling FW83pct/Hz 100w REC300s: 1.2.1" when AC coupling with Enphase. While this won't increase the output, as it will still be limited to 6000W continuous, it can be configured to charge the battery via AC coupling with the 6000XP.

https://eg4electronics.com/wp-content/uploads/2024/09/EG4-6000XP-System-Wiring-Diagrams.pdf

Thank-you.

 

[veonix84]

I was very happy to know this.
It's not ideal for my situation but useful if you don't have grid connection or have enough batteries to consume all the power generated.