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OK. I understand now that the SOC%-Voltage control setting for the Discharge will determine the settings possible for AC Couple. But relative to using SOC% or Voltage for control, this is taking me back to where I started. I'm getting dizzy. On my Android app the Discharge SOC% On-grid...

Just an update. I finally found where the detailed historical data can be accessed: through the web monitoring site. I've made screenshots of many of the charts and it's going to take some time for me to wrap my mind around all of it. I wish they would add a chart on the mobile app and LCD...

I considered that during my planning stage, but with as little as I knew about solar at that point, I thought the AC Coupling would be much cleaner. It would also leave the MPPTs in the EG4 18Kpv open for potential solar additions. Also, the warranty on the roof mounted solar panels and Delta...

I'll try these suggestions. I'm using the EG4 battery hub which is communicating with the inverter. I tried setting the AC Charge control back to SOC%, but the SOC% settings for AC Coupling stayed greyed out. I'll try the alternate settings method later. EDITED 1/8/24: I now see that the...

The EG4 version of the Android app will not allow using the SOC% START or END settings at all. They are greyed out, and I don't know why. I can only use voltage control. I'll set the END to 57V and the START to 54.1V (57 x .95) for grid down situations. Can I still use Quick Charge if I have...

I have already replied to this post in detail, but I have another question for you. What is the latest inverter firmware for the EG4 18Kpv? Where is the best place to download it from? When you say they "operate the same way" do you mean they use the same firmware? I'm at build fAAB-1312 and...

I'm replying to my own message to pass on the answer to my question, which I received from Luxpower_GIlbert in another thread. He told me the Android app setting labelled "AC-Couple", and the associated START and END settings, are only active when the grid is down. I am assuming that this is...

I am at build fAAB-1312. I tried to do an update from the Android app yesterday, and I had three .hex files ready to go. When I hit the connect and update button I got an error message that it couldn't find the correct file (Not those exact words). I am thinking this is because maybe none of...

I have no solar panels attached directly to the MPPTs in my EG4 18Kpv; only AC-coupled solar power coming into the GEN terminals. The EG4 software doesn't count the AC-coupled power as SOLAR power in its historical graphs. Solar input shows as being zero. Is there some setting I'm missing...

These sound the same to me. I've had both active at the same time, and did not notice any problems. I am now running with the Run Without Grid and the Power Backup settings ON with Off Grid setting OFF.

Thanks for replying Gilbert. I have battery priority set on (in the android app), which I assume is the same as Charge First (PV) on the LCD screen settings. This illustrates one of my problems. There is not a one-to-one mapping of the settings in the android app with those available on the...

It took me awhile, but I finally got through some of the other posts' suggestions, and I wanted to come back and thank you for your feedback. I was not fully aware of how the AC-coupling control system works, and knowing that other equipment has similar limitations is valuable. It also led me...

Thanks for checking on this for me. Now that I know the EG4 18Kpv CAN do it, I only have to figure out WHERE it's hidden and HOW to unlock it. Your red circle on the grid icon is my first clue. I'll start by trying to poke on that icon a little bit. Once again, the members on this forum have...

Which inverter would be most likely to be able to log the frequency, the EG4 or the Delta grid-tied inverter?

Thanks for the glimmer of hope. I'll be looking for a way to log the frequency changes, but not sure if it's possible on this equipment.

Delta M8-TL-US. I'll be looking for a frequency readout to check.

Sorry for the late reply, but I thought a 200A bypass capability meant that the inverter would pass whatever power it needed from the grid, up to the 200A limit, whenever the solar wasn't adequate with the grid up. I still don't see why the battery ever gets involved in this situation.

Its a Delta M8-TL-US, Here's the technical stuff from the manual. STANDARDS / DIRECTIVES Enclosure protection rating Type 4 Safety UL 1741, CSA-C22.2 No. 107.1-01 Software approval UL 1998 Ground fault protectionUL 1741 CRD Anti-islanding protectionIEEE 1547, IEEE 1547.1 EMCFCC part 15 Class B...

STANDARDS / DIRECTIVES Enclosure protection rating Type 4 Safety UL 1741, CSA-C22.2 No. 107.1-01 Software approval UL 1998 Ground fault protectionUL 1741 CRD Anti-islanding protectionIEEE 1547, IEEE 1547.1 EMCFCC part 15 Class B AFCIUL 1699B (Type 1), NEC 2017 Article 690.11 Integrated meter...

I'm not using micro-inverters on the solar array. My grid-tied inverter is a Delta M8-TL-US with two strings attached, and I have no idea what its throttling down characteristics are. If, as some have said, it can only respond to on or off signals, then I understand why it's doing this. I...

There is a settings group called Discharge Setting - AC Couple in the android mobile app. This setting has been getting turned off without any input from me during my grid down simulation. It's even crazier when I check the LCD screen settings on the inverter, and the AC-Couple setting is...

My System: EG4 18Kpv - Six EG4 LifePower4 Batteries - AC-coupled 8kW Solar Array and Grid-tied Inverter - Utility Interconnection Agrreement to Export I am four days into my initial grid-down simulation, and I'm mostly pleased with the system performance. This is probably the time of year...

Yes. I intend to have the batteries at full charge as much as possible. I've heard that the batteries don't want to stay at 100% for long periods, and I think that's why the new batteries are shipped at about 50% SOC. I will purposely discharge the batteries once in awhile, but I'm not sure...

Here are some photos. Note that I had to use "Polaris" multi-port connectors in the main breaker box to get those 2/0 cables to make a sharp 90 degree turn.

Yeah, it seemed pretty low for a 48V system. I'll change that setting today to something that represents about 10% SOC. I updated the inverter firmware to fA-1.0/build fAAB-1312, and the LCD firmware to v13, about a week ago.

It turns out that you are correct. In my area of Florida, the inspectors allowed me to use the bottom lugs on my main exterior breaker panel, without any feedback breaker, as the feed directly to the GRID terminals on the EG4 18Kpv (and therefore also the connection for any export to grid). I...

The Discharge cut-off % off-grid was already at 20%, but now, with Voltage control, it is set for 40V. This was the default when I started the app. It seems awfully low to me, but I'll leave it there for now. Success! Your suggestion to try the Voltage control rather than SOC% control over...

Nice to know I'm not just one crazy person wanting this. Now there are two of us. Yay!

Jarrett, Sorry, but I'm clueless how to send a DM on this forum. I'm computer literate, but forum stupid.

I didn't send it from my email. I used the EG4 contact page which doesn't require an email address. I also sent a message this morning on that same page. I would prefer to send my requests directly to someone's email address so I can track any responses and know if it was received, but there...

Well, it looks like progress. At least the setting wasn't rejected. I switched to Voltage control and set the On-Grid cut-off to 56.0V. The batteries are presently at 99% SOC and 53.8V, according to the inverter LCD screen. I have the AC coupled solar array set up to give Battery First...

No, but I will. I have it set to use the SOC% as the control for now, and it only allows settings between 0 and 90%. I tried setting at values above 90%, and they weren't accepted.

I bought the EG4 18Kpv and 6 LifePower4 batteries to have backup power if the grid goes down. My existing grid-tied solar system is AC coupled to the new inverter, and the entire system is set up with my utility for exporting back to the grid. I want the full 100% of battery capacity to be...

I have just found that the EG4 18Kpv can backfeed a maximum of 33.6kW AC power to the grid (using feeder taps). Up to 21.6kW (90A) of AC-coupled power plus 12kW (50A) of inverter output if 12kW or more of solar panels are connected to MPPT channels. This is in section 3.8, page 28, of the...

I bought a EG4 18Kpv and 30kWh of LifePower4 batteries to add to an existing 8kW solar array and grid-tied inverter. The existing grid-tied system can feedback 32A max through a 40A feedback breaker. This stays within the 120% rule for the 200A busbars in that breaker panel. My preference is...