Megarevo RxLNA Discussion

MNRosado said:

FYI everyone, with the new Firmware update.

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Any chance you know what it fixes or enables?

I am waiting on Firmware, for now it allows you to parallel inverters. Once i get more info i will relay. I have been busy last few months. Running off grid MRO runs very well.

200 amp Seplos BMS using Canbus and MRO (canbus) using 20 Kw DIY battery.

MNRosado said:

200 amp Seplos BMS using Canbus and MRO (canbus) using 20 Kw DIY battery.

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So the white flat cable is an 8 wire 1:1 RJ45 cable between SEPLOS BMS and the MR RJ45 and it uses CANBUS to communicate.
Your MR uses CANBUS to talk to the other MR's in parallel.
What is the CAT5 cable left of white flat cable on the BMS for ? Does that go to the RS485 <-> USB converter?
Do you have the layout of the colors on the RJ45 connector on the grey cat5 cable for me so I verify my wiring?

So the white flat cable is an 8 wire 1:1 RJ45 cable between SEPLOS BMS and the MR RJ45 and it uses CANBUS to communicate. YES!!
Your MR uses CANBUS to talk to the other MR's in parallel. That is what is shown in the MRO document for Parallel operation.
What is the CAT5 cable left of white flat cable on the BMS for ? Does that go to the RS485 <-> USB converter? YES and into Laptop
Do you have the layout of the colors on the RJ45 connector on the grey cat5 cable for me so I verify my wiring? Yes see attached Pic make sure cable is good i spend a couple of hrs, and finally realized i had a bad cable. Note device manager must shown USB serial device and software connected as shown.

minerva said:

Can you change settings remotely? Is it an essential thing to have?

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I can.

jsmetalcraft said:

I am am uncertain about the proper direction of the CTs. I found some replacements but they do not have an arrow. Is the Power screen suppose to read negative watts or positive with no PV and inverter off, bypass mode.? Negative would be with the arrow pointing towards the grid and positive watts would be with the arrow pointing toward the loads.

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Arrows should point to GRID

dayala said:

Arrows should point to GRID

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Mine point away from MR's grid input

MNRosado said:

Hi Everyone, I thought i would post this question here, instead of creating a new post, since it is related to the 8k Megarevo. So My question is has anyone been able to get Megarevo (BSE8KLNA US 8KW Hybrid Solar Inverter(Low Voltage)) to charge a LFP battery (with grid or PV) without using can bus communication, by using the lead acid battery setting with lets say these parameters (or any other) Charge V = 55v, Bat end V 48v and Bat OVP 55v. I have been testing this unit for the last week and for the life of me i cannot get it to charge the battery.

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Try charge 58v, Bat end 48v and OVP 55v

dayala said:

Try charge 58v, Bat end 48v and OVP 55v

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OVP should be higher than charge, no?

cmack said:

Mine point away from MR's grid input

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You're good.

cmack said:

OVP should be higher than charge, no?

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Yep, Over Voltage Protection should be higher than charging voltage obviously

I am getting really discouraged by my MR
I am not able to get communication with the batteries going.
China wants me to install a "message app" for support. WeChat is what they want me to install and that would give the chinese gov access to a lot I don't they need access to. [I am one of those people who never had a twitter/FB account]
So I am stuck without support it seems.

Since I have a power outage coming up, I really would like my MR to run part of my load of the house.
I have plenty of solar but without battery support it seems it is not going to work with the MR
Desperate enough I hooked up 4 x 120Ah Lead acid up ( I think they are AGM). They are old but they have a voltage so why not?!

Charging voltage : 14.4 x 4 = 57.6
OVP at 59
charge current at 15
Something seems to work:


So I walk over to the main breaker and flip the breaker that connects the MR to grid, there was a little bit of PV power left.

My load is a max of about 200 watt so I think "what could go wrong, right?"
When I flipped the grid breaker, the 2x 20 amp breaker on "load1" (secure load panel) both tripped as well.
Those are the eaton Type BR 20-Amp 1-Pole Dual Function AFCI/GFCI Circuit Breaker which means the neutral passes through the breaker as well.
Is the arc from flipping the grid breaker on the input of the MR enough to activate the AFCI protection of the secure load panel?
How will that go when they switch of the main input of the day of the maintenance?
I have to assume that will give an arc as well.
I thought it would be easy to use this MR as a glorified UPS for the home.
Doesn't seem to work that way.
I could of course replace the breakers with non AFCI and try again.

Discouraging.

Does anyone here has lead-acid batteries hooked up to his/her MR and is willing to share with me some settings?
What I have set it to:
Battery info:
TYPE: lead acid
temp: 0C
SOC 0%

LEAD BAT: 60Ah (i know these are old 120Ah batteries so I took a safe setting)
Charge Volt 57.4
Bat end-v 46
Bat OVP 58

Currently my displays shows:
Battery
Volt: 57.4V
Curr: 3.2A

REACT MODE
QU WAVE <- what is that ? and what are the other options: power factor & react power ?

What are these settings?
grid percent:
INPUT 100%

DISC DEPTH
GRID DOD: 40%
offgridDOD: 40%
Return: 70%

fromport said:

Does anyone here has lead-acid batteries hooked up to his/her MR and is willing to share with me some settings?
What I have set it to:
Battery info:
TYPE: lead acid
temp: 0C
SOC 0%

LEAD BAT: 60Ah (i know these are old 120Ah batteries so I took a safe setting)
Charge Volt 57.4
Bat end-v 46
Bat OVP 58

Currently my displays shows:
Battery
Volt: 57.4V
Curr: 3.2A

REACT MODE
QU WAVE <- what is that ? and what are the other options: power factor & react power ?

What are these settings?
grid percent:
INPUT 100%

DISC DEPTH
GRID DOD: 40%
offgridDOD: 40%
Return: 70%

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Can you try a return of 20%? I think that value needs to be higher than the discharge value. So it will discharge to 60 soc and charge to 80 before discharging again.

fromport said:

I am getting really discouraged by my MR

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I'm not sure of your system topology. I think you have a grid panel to run part of your home that the MR would supplement by monitoring CTs to prevent sending extra to utility. Then you have a CLP that the MR feeds from LOAD1. With main grid panel breaker flipped off, the MR is NOT enabling EPS from battery/PV alone?

Currently, I have NO grid connection. My breaker panel is hooked to LOAD1. I'm using DIY lithium but with LEAD-ACID selected. I'm using SELF-CONSUM mode.

With main grid breaker off, MR powered off, If you unplug the two CTs, then connect batt, then PV, will the MR run the EPS off batt/PV?

cmack said:

Can you try a return of 20%? I think that value needs to be higher than the discharge value. So it will discharge to 60 soc and charge to 80 before discharging again.

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Return needs to be higher then DOD. A return of 20% is useless in that the DOD is 40%, making it lower and battery will never reach 20% if it stops at 40%.

I want my battery to return soon, in that if the load has a peak or a cloud comes by it can draw from battery again. For example Grid 40%, Return 45%. Has to charge 5% before the battery will discharge again.

jsmetalcraft said:

Return needs to be higher then DOD. A return of 20% is useless in that the DOD is 40%, making it lower and battery will never reach 20% if it stops at 40%.

I want my battery to return soon, in that if the load has a peak or a cloud comes by it can draw from battery again. For example Grid 40%, Return 45%. Has to charge 5% before the battery will discharge again.

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I am assuming all of those settings refer to DOD, not SOC.
DOD 40 = SOC 60
Return 20 = SOC 80

80% DOD is 20% SOC
40% DOD is 60% SOC
45% DOD is 55% SOC
I was wrong, with return of 20% DOD would be returning to discharge at 80% SOC. Thanks for correction.

jsmetalcraft said:

45% DOD is 65% SOC

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almost :D

jsmetalcraft said:

Thanks for correction.

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no problem, it's the reality of working with such a poorly documented unit

Greeting All,

Attached are latest firmware from Megarevo 8KSNA and the rebranded garden variety from BlueSun, GSL and so on.
This latest version will supports the Parallel inverter functions and bug fixes. ZIP package includes, the Tools for loading as well as instructions.

The files are provided as is, your mileage may vary. ?

misterbubbacat said:

Greeting All,

Attached are latest firmware from Megarevo 8KSNA and the rebranded garden variety from BlueSun, GSL and so on.
This latest version will supports the Parallel inverter functions and bug fixes. ZIP package includes, the Tools for loading as well as instructions.

The files are provided as is, your mileage may vary. ?

Click to expand...

Could you put in the announcement what version of the firmware lcd&arm is included in the attachment?

fromport said:

Could you put in the announcement what version of the firmware lcd&arm is included in the attachment?

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I have not had a chance to load the new firmware. Received it hot off the Megarevo oven last night. From Megarevo's Troy & Company.
Anyone if tested, please post the details here. Thanks.

Here's the Firmware upgrade instructions.