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Megarevo RxLNA Discussion

Very interesting. I get these 'spikes' too and I've been paying more attention to them lately. When they occur for me, they always drop down to whatever my load is. This tells me there is plenty of solar to power the load directly, but its essentially 'turning off' charging to the battery, and reducing the demand from panels. I'll try to lower the charge current, and see if it affects it for tomorrow.
 
I adjusted the charge current and the spikes still occur and as frequent. My battery is at about 50% SOC today so I know its not high or low voltage.
 
Hey everyone thanks for posting all of this useful information. I received updated firmware from Megarevo today. The zip does not contain an installer so I am waiting on that, but you may be able to use the one from page 9 of this thread.

I'm not sure what the DSP version is, but CPU version appears to be 1.4.10 (2022/08/03)

Hopefully today I can find a USB male to male cable and update the firmware tonight.

Attached the package I received in case anyone else wants to try it.
 

Attachments

  • R8KLNA 20220803.zip
    2 MB · Views: 19
What are people using to visualize data from the inverter? I'm using Solarman Smart with the wifi logger but it's very slow and buggy.

This post seems promising for real-time polling and remote management but also seems very complicated to setup.
 
cmack said:
Hey everyone thanks for posting all of this useful information. I received updated firmware from Megarevo today. The zip does not contain an installer so I am waiting on that, but you may be able to use the one from page 9 of this thread.

I'm not sure what the DSP version is, but CPU version appears to be 1.4.10 (2022/08/03)

Hopefully today I can find a USB male to male cable and update the firmware tonight.

Attached the package I received in case anyone else wants to try it.
Click to expand...
IMG_20220803_095554399_HDR.jpg
 
fromport said:
I really utterly dislike windows.
I managed to flash the first file (.axf) which upgraded the ARM from 1.03.11 -> 1.03.12
then suddenly windows decided to update and I lost connection with the usb serial port.
Not able to update the .out file yet

:-(
Click to expand...
I managed to update the .out file as well.
the dsp software went down from 2.04.11 to 1.04.10
As far as I quickly could see, the parallel function is not in yet.

double checked:
user -> 1. setup -> password check -> menu ends at 14, in my version 15 == parallel setup.

I am going back to the parallel version of june of 2022
 
Last edited:
This is a firmware update I received for my "bluesun" megarevo.
It has the ability to parallel the 8K units.
This will update the LCD firmware to V1.03.11 and the DSP to 2.04.11

The firmware update that @cmack just posted has the LCD firmware on 1.03.12 but the DSP 1.04.10 and yet it is much more recent than the firmware I attached.
 

Attachments

  • Local_updating_8k_parademo.7z
    14 MB · Views: 18
DSP 2.04.11 makes no sense, a dev mistake I assume :unsure:

Got me a cable I'll run the update in a few hours.

For the record I am doing this update in hopes of solving a few issues on ARM 1.03.06 / DSP 1.04.06:
  • Freezing data feed
    • PV input, battery, load readouts on the display stop updating
    • Logger data shows the same frozen readouts
    • Inverter continues to function
    • Does not resolve until a reboot (sometimes requires multiple reboots)
  • Repeat "gird" under volume / freq. errors
  • Inverter display cycles through the screens on its own (as if you're pressing the up/down errors over and over)
    • Only seems to happen when GRID input is powered (i have anti-reverse enabled)
  • Other unexpected behaviors
    • Switching on / off GRID from the external breaker (simulating a power outage) will interrupt the loads even with plenty of battery / pv input (self-use mode)
    • Turn on battery - Inverter starts - Loads powered - Turn on PV - Loads are interrupted - Loads powered (why?)
    • I need to confirm but I think the same issue happens when starting with PV and then battery
 
cmack said:
DSP 2.04.11 makes no sense, a dev mistake I assume :unsure:

Got me a cable I'll run the update in a few hours.

For the record I am doing this update in hopes of solving a few issues on ARM 1.03.06 / DSP 1.04.06:
  • Freezing data feed
    • PV input, battery, load readouts on the display stop updating
    • Logger data shows the same frozen readouts
    • Inverter continues to function
    • Does not resolve until a reboot (sometimes requires multiple reboots)
  • Repeat "gird" under volume / freq. errors
  • Inverter display cycles through the screens on its own (as if you're pressing the up/down errors over and over)
    • Only seems to happen when GRID input is powered (i have anti-reverse enabled)
  • Other unexpected behaviors
    • Switching on / off GRID from the external breaker (simulating a power outage) will interrupt the loads even with plenty of battery / pv input (self-use mode)
    • Turn on battery - Inverter starts - Loads powered - Turn on PV - Loads are interrupted - Loads powered (why?)
    • I need to confirm but I think the same issue happens when starting with PV and then battery
Click to expand...
I am now running your AXF (ARM V1.03.12)
with my .OUT (DSP V2.04.11)
IMG_20220803_112826858_HDR.jpg
hybrid firmware on a hybrid inverter ;-)
My .OUT file brought the parallel settings back under setup -> 15. PARALLEL
 
cmack said:
  • Inverter display cycles through the screens on its own (as if you're pressing the up/down errors over and over)
    • Only seems to happen when GRID input is powered (i have anti-reverse enabled)
Click to expand...
This is normal behavior. If you press the Enter button you should see a lock icon in upper right corner and it will not scroll through the screens. If you have an warning it will not scroll on it's own.
 
cmack said:
For the record I am doing this update in hopes of solving a few issues on ARM 1.03.06 / DSP 1.04.06:
  • Freezing data feed
    • PV input, battery, load readouts on the display stop updating
    • Logger data shows the same frozen readouts
    • Inverter continues to function
    • Does not resolve until a reboot (sometimes requires multiple reboots)
Click to expand...
I started with ARM V1.03.03 & DSP V1.04.04 and never experienced that, but I only have PV & grid hooked up, no batteries yet.

cmack said:
  • Repeat "gird" under volume / freq. errors
Click to expand...
yeah
hate to disappoint you:
strings hybrid_app8K_V12.axf |grep -i gird | wc -l yields 85 results eg: L1GirdVoltCalib_UP 1100


cmack said:
  • Inverter display cycles through the screens on its own (as if you're pressing the up/down errors over and over)
    • Only seems to happen when GRID input is powered (i have anti-reverse enabled)
Click to expand...
I have never seen that happen (yet)
cmack said:
  • Other unexpected behaviors
    • Switching on / off GRID from the external breaker (simulating a power outage) will interrupt the loads even with plenty of battery / pv input (self-use mode)
Click to expand...
That would be very disturbing.
I thought that was because I haven't hooked up my batteries yet.
cmack said:
    • Turn on battery - Inverter starts - Loads powered - Turn on PV - Loads are interrupted - Loads powered (why?)
    • I need to confirm but I think the same issue happens when starting with PV and then battery
Click to expand...
I have hooked up 3 of the 4 pv mppt inputs.
When I disconnect one of the inputs with a DC disconnect, the unit continues working.
When I reconnect the string back to the inverter, the whole inverter stops working for a seconds and restarts.
I again was thinking the batteries would take over once I have them hooked up.
That might not be the case huh ? hmmmmm
 
Last edited:
fromport said:
I have hooked up 3 of the 4 pv mppt inputs.
When I disconnect one of the inputs with a DC disconnect, the unit continues working.
When I reconnect the string back to the inverter, the whole inverter stops working for a seconds and restarts.
Click to expand...
What versions are you experiencing this on? Sounds very similar to my issue. A change in grid availability should not interrupt loads that do not depend on grid!
 
Just ran a test that worked as expected:
  1. off grid powering loads with battery / pv
  2. turn on grid
  3. battery starts charging at set rate, loads not interrupted
  4. on display, grid shows 0 load
  5. turn off grid
  6. loads interrupted for <1s
  7. battery and pv take over load
  8. turn on grid
  9. nothing happens for about 5 minutes (inverter is still in off grid mode)
  10. battery starts charging and inverter is in grid mode
  11. display still shows 0 load on grid
TLDR; Inverter handled a simulated grid outage properly, with a 5 minute delay before resuming on-grid operation. HOWEVER the display never showed a load on grid.

This is before any firmware updates, hopefully coming this eve.
 
The switching time is or can be a bit slow. I know if I turned off grid breaker I see a flicker and sometimes turns off the entertainment center. Though a month ago the grid went down and I didn't have a clue other then one clock is on the main panel and was blinking. I have batteries so it could or I think should make a bit of difference but the switch speed is what it is regardless.

I also see the interruption when turning on PV. Funny you can turn on one array and everthing is normal. It's usually the second or third array when it goes into bypass mode. May have somthing to do with the insulation test part of the inverter?
 
I'm trying to figure out what a bunch of these settings mean, the manual is pretty useless. Is there a better description somewhere? I'm wondering about:
  • sys > start delay - why is this an option?
  • bat > discharge depth > return - what does it do?
  • run > every setting (react mode, power, vac, fac, etc)
 
The firmware install instructions i received from megarevo are no good. I went and bought a USB A-A cable just to find out that the inverter now uses a USBC input in a completely different location. Unless I am blind and dumb. Possible.

So I plugged into the USBC and got nothing in the firmware app (no "COM" option under the 2nd dropdown). Tried rebooting the inverter with cable connected still nothing.

To those who have applied updates, what USB interface does your inverter use? Which version of windows did you succeed with?
 
My units both use USB-C. I installed the update software, then plugged in the USB cable, and the com port shows up in my device manager. I use that com port in the drop down, and it works fine. The only catch is that you need the .axf and .out files in the root directory of your drive or it won't see them.
 
NCSolarGarage said:
My units both use USB-C. I installed the update software, then plugged in the USB cable, and the com port shows up in my device manager. I use that com port in the drop down, and it works fine. The only catch is that you need the .axf and .out files in the root directory of your drive or it won't see them.
Click to expand...
Which version of windows did you use?
 
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