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Megarevo 8K Firmware Update

fromport said:
what I see is that "load power" was showing about 11,500 watts.
On top of that you were exporting 5,500 watts to the grid. That would mean a total of 16,000 watts coming of your inverter which is double it's rating of 8,000 watts.
That is impossible

Something doesn't add up in your picture..
Click to expand...
Agreed. If that were a `Real load' it would have tripped the 40 amp breaker.

I killed the batteries at that point. I thought about it, then decided to cut the batteries back on and kill the grid breaker. When I cut the batteries on, I got a buzzing and then the red alarm light on the eg4 lifepower, same with eg4 LL. So, I'm at square one with the batteries off and on grid til lunchtime and I? can reboot the inverter.
 
Shwetty said:
Agreed. If that were a `Real load' it would have tripped the 40 amp breaker.
Click to expand...
agreed!
Could it be you have your CT's reversed ?
What direction are your arrows pointing to ?
towards grid or towards inverter?

Shwetty said:
I killed the batteries at that point. I thought about it, then decided to cut the batteries back on and kill the grid breaker. When I cut the batteries on, I got a buzzing and then the red alarm light on the eg4 lifepower, same with eg4 LL. So, I'm at square one with the batteries off and on grid til lunchtime and I? can reboot the inverter.
Click to expand...
could be the in-rush current when you switched them on.
Do you have a pre-charge resistor in your setup ?
 
fromport said:
agreed!
Could it be you have your CT's reversed ?
What direction are your arrows pointing to ?
towards grid or towards inverter?


could be the in-rush current when you switched them on.
Do you have a pre-charge resistor in your setup ?
Click to expand...
1. Yes, CT's pointing toward grid wire entry into inverter.
2. The EG4 lifepower batt has the internal resistor. I always use that batt to startup. In the state it was in, it needed a reboot and all is well now. That is until next time it decides to dump into the grid.

Found something interesting from the ver 1,4 manual and would like to try the firmware making the Advanced choice available. Does anyone have this available?

11.2 Advanced Mode Setting
The Advanced Mode Settings page can be accessed through the following steps on the screen:
USER->1. SETUP->PASSORD CHECK->16.ADVAN SET

11.2.1 Setting
Interface Description
This interface displays advanced mode settings.
1. ->Inverter working mode setting.
2. ->Inverter related function control. See 12.2.3 Advan Ctrl for
details.
3.->Time of use setting. See 12.2.4 Time of use for details.
4.->The CT will detect power flowing back to the grid and Limit the
grid output according to the set value.
5.->Maximum power entering household power grid.

11.2.2 Work Mode
Interface Description
1.->Disable advanced mode.
--ADVAN SET--
-- >1.Mode Set
2.Advan Ctrl
3.TOU Set
4.CT Limit
5.Grid Power
--MODE SET--
-- > 1.Disable
2.Sell First
3.Limit Grid
4.Zero Export
 
Well, bad news. Parallel doesn't work on this latest firmware. Well, it does function and share the load, but the "reporting" is all done from the master, unlike the previous versions which kept settings separate.

What this means is that on the old version, you can set things like charge voltage, current, etc independently. When they switched to the new firmware, they "simplified" things and locked the settings of the slave, and everything is controlled by the master, which is nice so you only have to make changes on one inverter.

The problem, however, is that the master is still only reporting 8k capacity and 8k load percentages. Due to crappy weather, I haven't really loaded the system so that I didn't drain batteries too deeply. Well today the weather is perfect, not a cloud in the sky, over 10K of generation so far this morning. I plugged in the car and saw the load spike to over 100%. Strange I thought. Then everything shut off. I reset the inverter, checked again, same problem.

The inverters are sharing the load, but the master is turning everything off once 8k total output is reached. FAIL. Back to old reliable firmware :(
 
NCSolarGarage said:
Well, bad news. Parallel doesn't work on this latest firmware. Well, it does function and share the load, but the "reporting" is all done from the master, unlike the previous versions which kept settings separate.

What this means is that on the old version, you can set things like charge voltage, current, etc independently. When they switched to the new firmware, they "simplified" things and locked the settings of the slave, and everything is controlled by the master, which is nice so you only have to make changes on one inverter.

The problem, however, is that the master is still only reporting 8k capacity and 8k load percentages. Due to crappy weather, I haven't really loaded the system so that I didn't drain batteries too deeply. Well today the weather is perfect, not a cloud in the sky, over 10K of generation so far this morning. I plugged in the car and saw the load spike to over 100%. Strange I thought. Then everything shut off. I reset the inverter, checked again, same problem.

The inverters are sharing the load, but the master is turning everything off once 8k total output is reached. FAIL. Back to old reliable firmware :(
Click to expand...
Well that seems like quite the oversight. Do you have a contact to report the bug to? I know they will want access to your inverter instead of spending the time to setup their own lab to troubleshoot it which is annoying.
 
I don't really have a good communication channel. Luckily, @fromport has had some communication success and has been essential in helping to get my system to where it is today.

I just flashed back to the original parallel firmware with DSP 2.04.11 and everything is working as expected.
 
Shwetty said:
1. Yes, CT's pointing toward grid wire entry into inverter.
Click to expand...
Like this right (sorry non native english speaker and I feel I could interpret your sentence in 2 ways and want to make sure)
Screenshot from 2023-03-04 09-15-16.png

The arrow on the CT points to the power grid

Shwetty said:
2. The EG4 lifepower batt has the internal resistor. I always use that batt to startup. In the state it was in, it needed a reboot and all is well now. That is until next time it decides to dump into the grid.
Click to expand...
It is weird, un-explainable why i even gets in such a weird state.

First the sudden dumping of full power and 2nd the state it is in after disconnecting the batteries.
Shwetty said:
Found something interesting from the ver 1,4 manual and would like to try the firmware making the Advanced choice available. Does anyone have this available?

11.2 Advanced Mode Setting
The Advanced Mode Settings page can be accessed through the following steps on the screen:
USER->1. SETUP->PASSORD CHECK->16.ADVAN SET

11.2.1 Setting
Interface Description
This interface displays advanced mode settings.
1. ->Inverter working mode setting.
2. ->Inverter related function control. See 12.2.3 Advan Ctrl for
details.
3.->Time of use setting. See 12.2.4 Time of use for details.
4.->The CT will detect power flowing back to the grid and Limit the
grid output according to the set value.
5.->Maximum power entering household power grid.

11.2.2 Work Mode
Interface Description
1.->Disable advanced mode.
--ADVAN SET--
-- >1.Mode Set
2.Advan Ctrl
3.TOU Set
4.CT Limit
5.Grid Power
--MODE SET--
-- > 1.Disable
2.Sell First
3.Limit Grid
4.Zero Export
Click to expand...
I have not had the time recently to do anything.
Not even to install /hookup my 2nd MR with extra batteries which would make me grid-Independent (almost) ;-)

I will contact MR and see if they have a newer version of the software available.
 
NCSolarGarage said:
I don't really have a good communication channel. Luckily, @fromport has had some communication success and has been essential in helping to get my system to where it is today.

I just flashed back to the original parallel firmware with DSP 2.04.11 and everything is working as expected.
Click to expand...
I will forward your story to them and see if
a) they have a response at all
b) have newer firmware available.
 
fromport said:
Like this right (sorry non native english speaker and I feel I could interpret your sentence in 2 ways and want to make sure)
View attachment 137889

The arrow on the CT points to the power grid


It is weird, un-explainable why i even gets in such a weird state.

First the sudden dumping of full power and 2nd the state it is in after disconnecting the batteries.

I have not had the time recently to do anything.
Not even to install /hookup my 2nd MR with extra batteries which would make me grid-Independent (almost) ;-)

I will contact MR and see if they have a newer version of the software available.
Click to expand...
1. Yes correct according to the diagram.
2. If the new firm has the advanced menu, I would like a copy.
I'm just about to wire the grid to the generator terminals and charge the batteries that way without fear of dumping to the grid.
 
Shwetty said:
1. Yes correct according to the diagram.
2. If the new firm has the advanced menu, I would like a copy.
I'm just about to wire the grid to the generator terminals and charge the batteries that way without fear of dumping to the grid.
Click to expand...
Turns out that my firmware does NOT have the generator sub menu. Do you know where I can get that version?
 
Screenshot_20230317_121006_Docs.jpg

Screenshot_20230317_121015_Docs.jpg


I'm off grid but it would be nice if they did that. It is an option for start stop generator Control.

Screenshot_20230317_121048_Docs.jpg
 
Shwetty said:
Yes, I saw that in the Ver 1.4 manual and liked it. Since its in the manual, it proves the firmware exists...where is it??

I am using a 40 amp contactor tripped by a Kasa smart switch to grid charge for 2 hours at night to charge the batteries.
Click to expand...
Sent you a PM
 
Where do you guys get the firmware and how do you update it? I'm not finding anything.
 
Firmware is updated via the USB port of the inverter using the 'stream' program that is included in most of the firmware zip files. You should be able to get the firmware from your distributor, or some have been linked in this thread.
 
NCSolarGarage said:
Firmware is updated via the USB port of the inverter using the 'stream' program that is included in most of the firmware zip files. You should be able to get the firmware from your distributor, or some have been linked in this thread.
Click to expand...
Thanks! I bought an EG4 8k inverter so I found it on EG4 electronics website. I'm trying to figure out if Megarevo's firmware is better than EG4s or vice versa.
 
fromport said:
Have you tried both?
Which do you think is better ?
Click to expand...
I've tried both multiple times. Megarevo has the home load option but EG4 has "PV power" option in the menus. I'm not sure which each of them do though. Also, the EG4 version has a much higher version number. Not sure if it actually means anything though.

Btw it was suggested to me that I ask you about this... Have you figured out how to place the CTs for zero export or anti reverse? I can't figure this out for the life of me and I don't want to export to grid. I'm getting weird behavior with solarman app too.
 
ddeatrich said:
I've tried both multiple times. Megarevo has the home load option but EG4 has "PV power" option in the menus. I'm not sure which each of them do though. Also, the EG4 version has a much higher version number. Not sure if it actually means anything though.
Click to expand...
thanks for the feedback.
ddeatrich said:
Btw it was suggested to me that I ask you about this... Have you figured out how to place the CTs for zero export or anti reverse? I can't figure this out for the life of me and I don't want to export to grid. I'm getting weird behavior with solarman app too.
Click to expand...
No I haven't. I have net metering and I want it to feed back to the grid once my batteries are fully charged.
So I never played with those settings. But @cmack had the same issue like you: not wanting it to feed back and it did it anyway.
I have read more people with these issue's.
I really love my MR (I have 2) but the intermittent communication with MR support and no progress for a while now really disapoints me.
Since you have an EG4 branded MR, you should try leaning on EG more and try and get more/better support.
Afaik what you want: self supply mode without back feeding to the grid is *impossible* at the moment.
 
ddeatrich said:
I've tried both multiple times. Megarevo has the home load option but EG4 has "PV power" option in the menus. I'm not sure which each of them do though. Also, the EG4 version has a much higher version number. Not sure if it actually means anything though.

Btw it was suggested to me that I ask you about this... Have you figured out how to place the CTs for zero export or anti reverse? I can't figure this out for the life of me and I don't want to export to grid. I'm getting weird behavior with solarman app too.
Click to expand...
Fwiw Mine is running in peak shift mode where it does not back feed the grid during the day and will charge the battery overnight.

I’ve got aftermarket CT’s on it now but fairly certain I had to install them backwards to make it work right. I believe the software is wrong inside the machine.

I show my settings in this video:

Avoiding 30 Cents Per KWH Without A Sol-Ark
 
Beene Brothers said:
I’ve got aftermarket CT’s on it now but fairly certain I had to install them backwards to make it work right. I believe the software is wrong inside the machine.
Click to expand...
I tried your suggestion and reversed my CT's but the fans immediately went full speed, like a plane taking off.
I started pumping all power back into grid from my batteries.
Sure wasn't working for me (i did NOT reboot my inverter though)
 
fromport said:
I tried your suggestion and reversed my CT's but the fans immediately went full speed, like a plane taking off.
I started pumping all power back into grid from my batteries.
Sure wasn't working for me (i did NOT reboot my inverter though)
Click to expand...
Interesting. So with them facing the right direction it still exports some though?
 
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