As I understand it, I would think all the HF inverters would have some protection built into them to protect the MOSFET's when severally out of balance under heavy load. It's just a matter of where they set the bar. But I could be completely misinformed.
Megarevo RxLNA Discussion
- Thread starter jsmetalcraft
- Start date
I found this to confirm: It does say "Max.Input current of single MPPT(A)" so our thoughts appear to be correct. Each input is able to have up to 500vDC and 12a.
I wanted to inform everyone, I heard back from Jakiper batteries. They use pylon CAN communication. It should be able to communicate with their batteries.
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flygeek
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Starting work on decoding the communications between the Solarman stick-logger and the Megarevo. Not going quite as smoothly as I'd hoped, but some pieces are coming together.
I pulled apart the stick-logger and attached the circular adapter connectors to a breadboard and injected a Waveshare RS485 <-> Ethernet connector into the mix. I've tried having a Modbus conversation with the device, per the Goodwe spec mentioned earlier in this thread - but I've obviously got something configured incorrectly. What's giving me a little bit of hope is the fact that in one of the returned bytestreams the inverter serial number appeared.
I've also found the firmware version and 8K as a string.
There are a bunch of attached pictures of the components of the stick-logger + the unit plugging into the inverter once disassembled.
More details to come...
I pulled apart the stick-logger and attached the circular adapter connectors to a breadboard and injected a Waveshare RS485 <-> Ethernet connector into the mix. I've tried having a Modbus conversation with the device, per the Goodwe spec mentioned earlier in this thread - but I've obviously got something configured incorrectly. What's giving me a little bit of hope is the fact that in one of the returned bytestreams the inverter serial number appeared.
I've also found the firmware version and 8K as a string.
There are a bunch of attached pictures of the components of the stick-logger + the unit plugging into the inverter once disassembled.
More details to come...
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jsmetalcraft
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How do you know there is new firmware? I check Solarman every morning and I don't see anything. Not sure how it works yet. It asks for a name but I don't have any name, or it does not show any options.
jsmetalcraft
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I find Solarman worthless. It is not real time. I find it's 20-30 minutes behind and you must refresh each time you want to see the data. My unit quits displaying the data on both the Led screen and Solarman a few hours after a reboot, so it makes it even more worthless.
While the inverter does work it is full of bugs. What frustrates me is there is no avenue to communicate with Megarevo about these bugs and future upgrades that costumers would like to see to make the system better. I am patiently waiting to see what develops if/when there is a firmware upgrade. The others who reply in this thread have not posted anything about bugs. But I have a higher firmware version then they do. I thought we may have some help when I made the purchase, but Will made some changes to the forum and I feel that has caused some of those who were considered "vendors" to be kicked off or to leave.
I have reported a number of bugs. Unfortunately, a lot was lost in the deleted threads. Some were fixed with the firmware update. I miss mostly the promised functionality.
Not with the display per se.
Sun in Lithium
Northwest Alberta Solar supplier/installer.
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Has anyone tested the self consumption of the Megarevo?
In a off grid setup?
I also believe the same inverter is being sold by Gsl, Bluesun solar.
And probably others.
In a off grid setup?
I also believe the same inverter is being sold by Gsl, Bluesun solar.
And probably others.
I have the one sold by GSL but it just has Megarevo specs sticker and model number. Nothing says GSL on it.
I have not tried anything non grid connected. I’m not sure it will even produce from PV without a battery. Haven’t tried though. Still waiting on batteries.
I have not tried anything non grid connected. I’m not sure it will even produce from PV without a battery. Haven’t tried though. Still waiting on batteries.
jsmetalcraft
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You can turn grid off and the battery and the unit still powers EPS. Not sure what happens when you loose PV. I just tried it. Lights stayed on. It quit inverting so I had to reboot.
There is another rebranded Megarevo on e-bay. I looked up the company and they have web site. I e-mailed them and they sent me the owner's manual. Other then the change in model numbers everything else looked word for word.
LinioTech
There is another rebranded Megarevo on e-bay. I looked up the company and they have web site. I e-mailed them and they sent me the owner's manual. Other then the change in model numbers everything else looked word for word.
LinioTech
flygeek
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i've noticed the same thing - the data isn't being mangled by the stick-logger, the inverter actually stops emitting the values. I can get a nice chart on the solarman website and then it flat-lines - the LCD display is stuck as well.
flygeek
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I've been working on reverse engineering the Modbus protocol for the Megarevo and have made more progress. The registers sure as heck doesn't match the Goodwe protocol that I was told about. The list of registers in the table and spreadsheet were taken from snooping the Modbus conversations between the Solarman stick-logger and the Megarevo.
I can't figure out what a lot of the values map to, but have made notes as a starter. Generally the way it works is that you request a certain number of bytes at a particular Modbus register location and the inverter returns a bunch of bytes with the answer. The Megarevo is a modbus slave at address 0x01.
Here is the Google Sheet with my working notes and sample values: https://docs.google.com/spreadsheets/d/1dM3MnhSKt2p6dG-Upx3QWdM1qP4jifxwDWstptkI8yg/edit?usp=sharing
Now that I know what to look for I'll see if I can get some more info out of Megarevo.
I was able to talk to the inverter using the Waveshare RS485 -> Ethernet adapter using pymodbus.console, you could also use the pymodbus module and extract the data for graphing as well.
I can't figure out what a lot of the values map to, but have made notes as a starter. Generally the way it works is that you request a certain number of bytes at a particular Modbus register location and the inverter returns a bunch of bytes with the answer. The Megarevo is a modbus slave at address 0x01.
Here is the Google Sheet with my working notes and sample values: https://docs.google.com/spreadsheets/d/1dM3MnhSKt2p6dG-Upx3QWdM1qP4jifxwDWstptkI8yg/edit?usp=sharing
Now that I know what to look for I'll see if I can get some more info out of Megarevo.
I was able to talk to the inverter using the Waveshare RS485 -> Ethernet adapter using pymodbus.console, you could also use the pymodbus module and extract the data for graphing as well.
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Where di you find online videos of the Huaya 10k? I would very much like to see those and hear about any other resources with more detail on the Huaya inverter.
They were on YT, I don't recall the channel(s). They were not recorded in English and not split-phase. I almost completely hit roadblocks with the Huaya. I even contacted the company which manufacturers them for Huaya, and received no response. It's almost like they don't want to sell these inverters, I'm not sure what the deal is.
