NCSolarGarage
13.2kW Off-Grid
- Joined
- Sep 23, 2021
- Messages
- 210
You will need to use "Lead Acid" like you mentioned because the inverter won't allow the use of Lithium without BMS communication.
Megarevo RxLNA Discussion
- Thread starter jsmetalcraft
- Start date
thanks for the input, i changed up the settings a bit, trial and error to learn
charge voltage - 58v
battery end volt - i set this to 48v
battery OVP - 60v
charge current - 35a plan to take it to 60a old batteries no bms
fromport
Solar Addict
Is this the battery you are using ?
yes, they are not new, bms doesn't work so i'm just running the raw cells. i'm looking recommendations for charging settings, thanks
fromport
Solar Addict
Since the charging voltage is so much higher then other batteries, are these 17 cells in series by any chance?
If so, I would disconnect 1 so you you would get 52.1 nominal voltage, and put an BMS on that is capable of talking to the MR (eg seplos with BT)
Using voltage (aka lead acid settings) to indicate SoC on a Li-ion is really a bad idea (IMO)
ok thanks, appreciate the help
Good day. I am in the process of commissioning a BSE8KLNA (the BlueSun branded version of the Megarevo R8KLNA) and am trying to figure out how to set up using the Load2 output under the BackUp setup. originally, i had intended to hook up all loads onto the Load1 output and leave Load2 unused -as all of the loads are within the capacity of the inverter-, but I would like to have the alternative to hook up the non-critical loads (such as AC and water pump) to the LOAD2 output and control its use depending on the battery load. The user manual refers that the Load2 port can be set to power down when the battery charge is not sufficient, but it makes no reference on how to achieve this or set the desired disconnect charge.
Any light in this respect is greatly appreciated. If this question has been addressed elsewhere, please excuse my asking and refer me to the corresponding discussion, but I have not been able to find an answer.
Any light in this respect is greatly appreciated. If this question has been addressed elsewhere, please excuse my asking and refer me to the corresponding discussion, but I have not been able to find an answer.
Some of the others here may have a better updated answer but from what I have heard is that load 2 settings are not implemented yet on the firmware. It would be called smart load I believe when it is available.
paulwebb500
New Member
I am seeing this. I have an R61LK invertor with 5.5kw PV and 12 AGM lead acid batteries (250AH). A couple of days ago Megarevo upgraded online my original firmware from 0.0.16 (yep!) to 1.1.43 and a bunch of problems happened. I use Peak Shift anti-reverse and protected loads on a separate CU which worked great for a while. After upgrade I got Grid High Voltage Alerts (though grid was 251V although multimeter said 244V so wouldn't charge batteries. They ran down and the whole thing stopped. After a "Factory Reset" it saw a 230V grid voltage and charged the batteries overnight (on Octopus 12p/kWh tariff)....but on completion of charging it then dumped the batteries back to the grid at 5kW!...leaving my battery enpty again! Have asked to revert firmware.
fromport
Solar Addict
Do you have a link to your inverter ?
I assume the british version is a little bit different from the split phase unit used i North America.
paulwebb500
New Member
I was also told on the new release that "Spontaneous Self Consumption" was now allowed when I questioned why it had fed to grid at all if Anti-Reverse was enabled.....and was told this was a more "dynamic" thing now and it can do it anyway. I was confused.
paulwebb500
New Member
What woudl you like to see?
paulwebb500
New Member
https://www.megarevo.com/productinfo1.html here you go!
paulwebb500
New Member
Batteries charge to 54V on new firmware, and then spontaneous discharge to grid and go back to 50V, Very frustrating!
fromport
Solar Addict
I had searched for the model number you mentioned " R61LK" but in the overview I see R6KL1.
That is why my search didn't give any results ;-)
Hey guys,
I figured out how to use this thing with being grid tied with no batteries. Self consume mode doesn't work properly. If you want to do zero export but have it set to self consume, it doesn't work in any way. I had to change mine to battery priority even though I don't have any batteries to get zero export to actually work. If you try to use zero export + self consume with anti-reverse enabled, it will just say PV input is 0.
CTs have to be facing away from your breaker panel towards the grid. The grid reading in the inverter has to be negative so move your CT ethernet plugs around until you see at least one of the grid input on the screen being negative. You plug from the grid with a 40amp breaker into the grid input port. Since it's bi-directional, it will offset your load in your main panel. I tested this by running my heat pump and solar PV input increased when I was testing heavier loads. Using battery priority with no batteries doesn't really have any negative effects as far as I know at this point. I'm glad I got this stupid thing at least working for now.
Still not an acceptable fix. They need to get their firmware straightened out.
I figured out how to use this thing with being grid tied with no batteries. Self consume mode doesn't work properly. If you want to do zero export but have it set to self consume, it doesn't work in any way. I had to change mine to battery priority even though I don't have any batteries to get zero export to actually work. If you try to use zero export + self consume with anti-reverse enabled, it will just say PV input is 0.
CTs have to be facing away from your breaker panel towards the grid. The grid reading in the inverter has to be negative so move your CT ethernet plugs around until you see at least one of the grid input on the screen being negative. You plug from the grid with a 40amp breaker into the grid input port. Since it's bi-directional, it will offset your load in your main panel. I tested this by running my heat pump and solar PV input increased when I was testing heavier loads. Using battery priority with no batteries doesn't really have any negative effects as far as I know at this point. I'm glad I got this stupid thing at least working for now.
Still not an acceptable fix. They need to get their firmware straightened out.
This may not be the case anymore but when I bought mine a year ago GSL mentioned the inverter was not designed to run off grid without batteries. I know you are still connected to the grid but it may have something to do with how they have the code written.
That's weird, because that's pretty much a main function that hybrid inverters provide lol. That would be crazy. Called Signature Solar/EG4 and they confirmed it's supposed to work just grid tied too. They're looking into this issue as I called them and reported so I guess we'll see what happens.
Update: An update to my previous post. I tried putting the CTs with arrows facing towards grid AND arrows facing towards breaker panel. They both had the same effect with anti-reverse on. I'm getting strange behavior on solarman app too. For example, it will say solar is outputting 1kw, but the home is consuming 600 watts. Where is the extra power going? I am so confused.
Last edited:
collapsephotons
New Member
Thanks everyone for contributing to the communal knowledge of this nearly awesome and cost effective AIO!
I'm about to pull the trigger on 3x 8kw units from Alibaba. Wondering if anyone has any experience positive or negative with any retailers they would like to share? I understand with any reseller the communication and support will leave much to be desired but it see this venture possible with the community support. I don't see the additional cost of purchasing through any North American distributors to be worth it.
Hopefully I can get these running in 3 phase mode eventually, but that might be a lot to ask at this point, so for now I'm good with 2 units in split phase parallel, and a third hot/cold spare. I'm going to be setting up a standalone current/voltage monitoring system on all electrical connections so hopefully that data can help troubleshoot odd behaviors and streamline bug fixes for us all. I've got 13kW of PV already, and 30kWh LiFePo eG4 rack on the way. Completely offgrid with a dirty THD generator which I hope not to use! It seems the 10kW MR is newer, anyone get one of those units yet? I imagine they are very similar with just beefier inverting components.
To those of you with months of experience with this unit so far - would you do it again today or shell out 3-5x more for something more established with better support? Thanks and looking forward to contributing.
I'm about to pull the trigger on 3x 8kw units from Alibaba. Wondering if anyone has any experience positive or negative with any retailers they would like to share? I understand with any reseller the communication and support will leave much to be desired but it see this venture possible with the community support. I don't see the additional cost of purchasing through any North American distributors to be worth it.
Hopefully I can get these running in 3 phase mode eventually, but that might be a lot to ask at this point, so for now I'm good with 2 units in split phase parallel, and a third hot/cold spare. I'm going to be setting up a standalone current/voltage monitoring system on all electrical connections so hopefully that data can help troubleshoot odd behaviors and streamline bug fixes for us all. I've got 13kW of PV already, and 30kWh LiFePo eG4 rack on the way. Completely offgrid with a dirty THD generator which I hope not to use! It seems the 10kW MR is newer, anyone get one of those units yet? I imagine they are very similar with just beefier inverting components.
To those of you with months of experience with this unit so far - would you do it again today or shell out 3-5x more for something more established with better support? Thanks and looking forward to contributing.
