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GSL 8k non DEYE installation help! (Megarevo??)

Wet1 said:
Click to expand...
This is good news when in EPS mode. But I have yet to see it in when connected to Grid. SO this might be my misunderstanding or still having it shut down the 5 minutes each morning at dawn. Maybe I will also test by shutting off the grind in the morning. If updates don't improve by this fall I know I can use the inverter for an off grid application and use something different for the house.
 
Well I ran the Megarevo in eps mode for 30 hours after following instructions in the video. It did NOT go into the Isolation test mode this morning. So this is good news for those who are off grid. Matter of fact I did not find any faults with the unit running off grid. I guess the problems and the unit struggles when connected to the grid.
 
While running that mode, with grid connected, and then disconnecting the grid, did you run into any power loss issues? Or did it automatically switch without loss?
 
Slvrsky07 said:
While running that mode, with grid connected, and then disconnecting the grid, did you run into any power loss issues? Or did it automatically switch without loss?
Click to expand...
Switched without loss even though you can see a slight flicker in the lights. If I remember right it was enough to shut down the stereo. But when I turned the grid back on there was no issues noticed. Took 10 minutes or so before the inverter started to send power towards the CT's.

Now that I am back grid connected I see that the CPU1 Software Version：V0.00 and have had a couple "buss over vol" warnings. Goes into bypass mode for 10-12 minutes. Trying to watch PV voltage but nothing over 318v noticed.
 
Mods, should this all be moved over to the other more main thread so future readers can follow it all? Seems to me that would make sense for the majority of it.
 
jsmetalcraft said:
diysolarforum.com

Megarevo RxLNA Discussion

Calling all Megarevo owners. Seems like the other thread has been disabled? So I would like to start a thread to discuss or most important help each other out with problems, programming, or general. I want to start by asking about how the CT works to keep from back feeding the grid? Looking at...
diysolarforum.com diysolarforum.com
Click to expand...
Agreed the GSL or Bluesun 8k inverters are all Megarevo 8K (RxLNA).
 
jsmetalcraft said:
Well I ran the Megarevo in eps mode for 30 hours after following instructions in the video. It did NOT go into the Isolation test mode this morning. So this is good news for those who are off grid. Matter of fact I did not find any faults with the unit running off grid. I guess the problems and the unit struggles when connected to the grid.
Click to expand...
The fault will show up when you begin putting more loads on the inverter. It's really an on-grid inverter and when you subject it to higher loads it will pull energy from the grid if it has too. The Deye and Sol-ark are similar, too much juice pulled by the inverter in off grid mode will unbalance the load and temporarily shutdown. With Grid present it has a third source of energy to feed from. Remember there is no transformer here it's all electronic. Transformer based inverter have a high idle consumption, these are in the 60-70 watts.
 
Here is the Response from Megarevo on two wire start. Seem like they are aware of the issue and it will it included in the firmware upgrade. Sorry for the delay but that's due to a combination of language, time difference and me being a bit busy.
 

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MNRosado said:
The fault will show up when you begin putting more loads on the inverter. It's really an on-grid inverter and when you subject it to higher loads it will pull energy from the grid if it has too. The Deye and Sol-ark are similar, too much juice pulled by the inverter in off grid mode will unbalance the load and temporarily shutdown. With Grid present it has a third source of energy to feed from. Remember there is no transformer here it's all electronic. Transformer based inverter have a high idle consumption, these are in the 60-70 watts.
Click to expand...
The fault shows up in the afternoon after the battery has charged. I monitored it yesterday and there were no big loads. Matter of fact just looking at external monitor and it had a warning with a 450 watt load, Later I had a high demand of 10kw on whole system and the inverter handled it's share with no issue, but was later in the day. Seems to be at peak solar times of the day 12pm-5pm?

I am wondering if beings I am 300 watts/array over paneled if that might be contributing. I will cover one cell on each series and see if there is a change.
 
If this pertains to Bus Over Voltage, I got the error again yesterday. Not sure why, it happened again in early morning as it did the previous time. Right about 830am or so. I'm not sure how the vBus is related to battery voltage or panel voltage. The main issue with this (until I understand it and repair) is that the system stays idle. All loads are off, but the inverter stays on, and it sees 300+ volts on PV, but the MPPT is off, and so is the EPS. As with this latest time, I was at work, and so I was without power in the shop until lunch when I was able to reboot and all was fine again.
 
NCSolarGarage said:
If this pertains to Bus Over Voltage, I got the error again yesterday. Not sure why, it happened again in early morning as it did the previous time. Right about 830am or so. I'm not sure how the vBus is related to battery voltage or panel voltage. The main issue with this (until I understand it and repair) is that the system stays idle. All loads are off, but the inverter stays on, and it sees 300+ volts on PV, but the MPPT is off, and so is the EPS. As with this latest time, I was at work, and so I was without power in the shop until lunch when I was able to reboot and all was fine again.
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Is it over VOLtage, or VOLume? Looks like a few of us are running at the 300 volt range and having this warning.

I taped a sheet of paper over a few cells where two parallel strings meet, one cell on each panel, to reduce my over paneled array to do a test. I can report that I did not have any warnings all day. Hopefully I can repeat with the same results today, and then conclude that the Megarevo is sensitive to over paneling. ( or is it that my pv voltage was 325v before and yesterday with cells covered 305v)

Now at 7pm the unit did quit inverting and went into bypass mode even though the fans remained on and everything showed normal. No warnings appeared on screen or Solarman. I turned off grid breaker, it switched to EPS mode, turned grid back on, and in 10 minutes everything returned to normal.
 
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jsmetalcraft said:
Is it over VOLtage, or VOLume? Looks like a few of us are running at the 300 volt range and having this warning.

I taped a sheet of paper over a few cells where two parallel strings meet, one cell on each panel, to reduce my over paneled array to do a test. I can report that I did not have any warnings all day. Hopefully I can repeat with the same results today, and then conclude that the Megarevo is sensitive to over paneling. ( or is it that my pv voltage was 325v before and yesterday with cells covered 305v)

Now at 7pm the unit did quit inverting and went into bypass mode even though the fans remained on and everything showed normal. No warnings appeared on screen or Solarman. I turned off grid breaker, it switched to EPS mode, turned grid back on, and in 10 minutes everything returned to normal.
Click to expand...
Screenshot from 2022-06-23 08-30-06_crop.png
No problem yet running over 300 volts in grid tied mode.
I am still on the very old firmware and need to upgrade ASAP.
 
This is my curve when it occurred. As you can see, I restarted the inverter at lunch, and it was happy again.

1656002526637.png
 
NCSolarGarage said:
This is my curve when it occurred. As you can see, I restarted the inverter at lunch, and it was happy again.

View attachment 99769
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Your back end of the Graph 12 noon onwards looks normal, before 12 noon it looks like no production. I had something similar were it would show voltage but not charge. i switched over to Lithium battery mode for a minute and and then back to Lead acid battery mode, and it started charging. Never stopped charging since. Monitor it, it may just be a one time deal.
 
MNRosado said:
Monitor it, it may just be a one time deal.
Click to expand...
That graph is what happens when "Bus Over Vol" Error pops up. The error occurred at approx 8:30am and will put the inverter in standby until I restarted at noon. I'm not sure what is causing the error.
 
I don't see any battery issue at the time of error, however I do see battery drop to 12v or so early in the morning. Strange.

1656078772358.png
 
NCSolarGarage said:
I don't see any battery issue at the time of error, however I do see battery drop to 12v or so early in the morning. Strange.

View attachment 99893
Click to expand...
The battery voltage drop is indeed very weird but timeline wise it doesn not seem to be what triggered the shutdown.

I know there is newer firmware out there:
ARM v1.03.11
DSP v2.04.11

Could someone ask megarevo for a copy?
 
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