The Gridboss is only compatible with Hybrid inverters. So, the 12000XP wouldn't work with the Gridboss. You would need a 18kPV, Flexboss21, Flexboss18...

The Gridboss is most like picking up some kind of signal on the Gen port. Make sure the Gen Breaker is off on the Gridboss.

Try trickle charging the battery. Charge at a low amperage, about 1-5 amps.

We apologize for the delay, did you speak to someone? Can you share an email that is associated with the RMA request?

Yes, the Mini splits units come pre-charged refrigerant.EG4-AC-DC-Plug-N-Cool-Solar-AC-Manual-12K-24K.pdf

Make sure that you have No Battery set on Battery Type. Also, make sure that Off-Grid Mode is Disabled.

@dtbaker61 You can try following the instructions in the manual starting on page 72EG4-3000EHV-48-V2-Manual.pdf

@user11Does the outside unit turn on at all?I understand you mentioned not detecting anything at the system joints, but did you confirm that both refr...

@2wiley Can you send me a private message with your name, email, number and shipping address and I will look into sending a new line set for you.

Can you share a video or screenshots of what you are seeing on the EG4 app?Are all 3 lights on the dongle currently on?

@dfwtinker I see, are all the lights on? Are any lights blinking?

@bootsgalore There isn’t a specific way to power cycle the batteries, but I would say turning off the breaker first, then powering down the BMS. After...

@kostpower I apologize for the delay on the part! Let me know if you need anything else!

@fonckBuenas tardes¿Pudo lograr que la batería LL se comunicara con el inversor?

@davidt I apologize for the delayed response. Because it started since the install, it could be that it was a defective unit, if you are still having ...