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High Voltage Inverter

I would try if I could. But I believe 96v is the max that the server rack batteries can handle. I know the side plate just show the max voltage range which is 85v-400v. It looks like they might have changed the model in the past year, but its hard to tell. Check with Megarevo on the nominal voltage. There might be a few left in stock somewhere...

I know the R8KLNA is a 48v unit so that's not going to work.
Exactly. Trying to reach out to these inverter companies is posing quite a challenge. I'll keep searching, but having no luck at the moment.

When you bought yours, did you have any contact you made during the process?
 
Email sent and went through so that's another contact I can at least try!

Can't thank you enough for the information! Major help and if you happen to do any more research on the high-voltage battery input, send it my way!
 
So you are still connected to the grid, just isn't hooked up to a bidirectional meter then correct? That way no back feeding can happen.
Not exactly.
A non bidirectional meter can't stop backfeeding. It just reads only one way. If you don't want to export, the grid-tied inverter must be programmed that way.
 
I purchased two Megarveo R12KH1NA inverters from Bluesun solar In June of 2022. I had and still have a lot of problems with these inverters. I'm at the point of pulling these inverters off the wall and starting over with another brand. Either one of these company's (Megarveo or Bluesun solar) support helped me with my problems and their warranty means nothing. A new buyer may want to research and be aware of problems with these inverters. Sure wish I Had
 
I purchased two Megarveo R12KH1NA inverters from Bluesun solar In June of 2022. I had and still have a lot of problems with these inverters. I'm at the point of pulling these inverters off the wall and starting over with another brand. Either one of these company's (Megarveo or Bluesun solar) support helped me with my problems and their warranty means nothing. A new buyer may want to research and be aware of problems with these inverters. Sure wish I Had
A member on this thread says he has them up and running with no problem at all. What issues have you been having to make them so terrible? I've heard a lot of good things about them as I have been researching them pretty heavily for my specific use.
 
Basic problem seems to be software that isn't fully developed. Some things that support this. I received only one CT and the manual shows only one CT being installed. In the US a split phase system is used, with 120 v loads (the neutral) carries unbalanced current making L1 and L2 unequal. With only one CT inverter sees only one Line, giving an incorrect watt reading to inverter. A lot of the work modes use that information, also total KWH used. That leads me to think Megarveo never tested these or fully developed them. I also was told parallel stacking would be available in month or so after purchase (nothing). Bluesun solar and the manual said I could use inverters without a battery (not so). That was important to me, cause I didn't want to buy batteries at this time. There are other examples, but this should be enough for you to make a decision. My inverters lock up at least once a day and have to be rebooted to continue producing. Something to do with an undeveloped inverter (probably)! Technical support and communication from Bluesun solar and Megarveo is nothing. Warranty is also nothing. I won't invest further in batteries for inverters without support. Hope this helps in your decision. My inverters are going to be taken down
 
I would try if I could. But I believe 96v is the max that the server rack batteries can handle.

I think if a (high current) bypass diode was placed across each server rack battery, it would never see a voltage it couldn't handle.
If it disconnects, instead of the rest of the batteries driving it to a high negative voltage, that would clip at a diode drop. Just like bypass diodes in PV panels.
 
I would be interested in sharing information on hybrid high voltage inverters. I will be taking down my Megarveo inverters and replacing them. A couple of thoughts are SOLIS S6 generation and new Growatt Hybrid coming out in second quarter. I want to go high voltage 192 nominal battery voltage to match existing setup. All communication welcome. Here is my existing installation before I remove Megarevo inverters.
 

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I would be interested in sharing information on hybrid high voltage inverters. I will be taking down my Megarveo inverters and replacing them. A couple of thoughts are SOLIS S6 generation and new Growatt Hybrid coming out in second quarter. I want to go high voltage 192 nominal battery voltage to match existing setup. All communication welcome. Here is my existing installation before I remove Megarevo inverters.

Solis S6 isn't a product one can buy today, the Solis 5G is available and my pair hardware wise have been flawless, software has taken most of that time to get reasonably useful, mostly due to the small volume of units sold and your typical differences in philosophy ( China ) of what field testing should be before products are released. Its running with a 400V BYD Battery Box HV, now discontinued.

Then there is the issue these are UL9540A units and your stuck with using what is actually made it through certification, which may not be batteries your interested in using.

High Voltage is nice, small wires, BMS interaction that takes care of SOC and running automatic discharge to keep SOC calibrated, but it is a very very small market, and I'm not sure if it will ever be a solution for the DYI installation market.
 
A member on this thread says he has them up and running with no problem at all. What issues have you been having to make them so terrible? I've heard a lot of good things about them as I have been researching them pretty heavily for my specific use.
So no one has mentioned that any inverter you choose in the USA must be UL listed AND split phase. Without one or both you will NOT pass inspection and you will not be allowed to export anything to the grid. If your off grid then you can do this but if you hope to remain on grid better run anything by your inspectors and your utility prior to purchase.
 
Solis S6 isn't a product one can buy today, the Solis 5G is available and my pair hardware wise have been flawless, software has taken most of that time to get reasonably useful, mostly due to the small volume of units sold and your typical differences in philosophy ( China ) of what field testing should be before products are released. Its running with a 400V BYD Battery Box HV, now discontinued.

Then there is the issue these are UL9540A units and your stuck with using what is actually made it through certification, which may not be batteries your interested in using.

High Voltage is nice, small wires, BMS interaction that takes care of SOC and running automatic discharge to keep SOC calibrated, but it is a very very small market, and I'm not sure if it will ever be a solution for the DYI installation market.
Yes, a couple of interesting points. High voltage is hard, but a desirable installation when finished. I had all my ducks in a row and my inspector was happy. THEN Megarevo failed me. So here I am, looking for plan two. Getting late, so tomorrow I will share my previous plans and history of this installation.
 
Yes, a couple of interesting points. High voltage is hard, but a desirable installation when finished. I had all my ducks in a row and my inspector was happy. THEN Megarevo failed me. So here I am, looking for plan two. Getting late, so tomorrow I will share my previous plans and history of this installation.
This seems to be a clean install. That is also quite the opposite of what I had heard about these inverters as I am using the Model 3 Tesla battery packs as my battery bank. These batteries have a nominal voltage of 355V with the max being 400V. I have an absolute steal with 1 completely healthy pack and possibly an additional healthy pack that I am testing now so the need for an HV split phase hybrid inverter is a must and seems to have these units in the running. These concerns are not surprising, but also disappointing. I would hope others with these units could chime in on their take as well.
 
Yes, a couple of interesting points. High voltage is hard, but a desirable installation when finished. I had all my ducks in a row and my inspector was happy. THEN Megarevo failed me. So here I am, looking for plan two. Getting late, so tomorrow I will share my previous plans and history of this installation
Just a few observations that might be helpful. They for sure need a battery to operate correctly. When I first finished the installation and was testing the inverter it would freeze up after a period of time if I did not use the correct startup procedure. Which for me was battery, grid, then pv. If I started with grid it would randomly freeze after a period of time. It would also freeze if I had a changed a few select setting's and did not power completely down and did the correct startup procedure. Did you ever install a battery? Looking at your photo it looks like you have a battery breaker installed. Once I had it dialed in I haven't had to restart or even look at the inverter's for almost a year now. Also I know in talking with Megarevo they never intended to run them in parallel. So not sure why Bluesun would have said that. They did eventually update the 48v version for this feature but that was the only one. For me I have one set up in grid tie only and the other as an eps. Both have access to the battery bank so my large 240 loads can run off the battery with net zero export.
 
Just a few observations that might be helpful. They for sure need a battery to operate correctly. When I first finished the installation and was testing the inverter it would freeze up after a period of time if I did not use the correct startup procedure. Which for me was battery, grid, then pv. If I started with grid it would randomly freeze after a period of time. It would also freeze if I had a changed a few select setting's and did not power completely down and did the correct startup procedure. Did you ever install a battery? Looking at your photo it looks like you have a battery breaker installed. Once I had it dialed in I haven't had to restart or even look at the inverter's for almost a year now. Also I know in talking with Megarevo they never intended to run them in parallel. So not sure why Bluesun would have said that. They did eventually update the 48v version for this feature but that was the only one. For me I have one set up in grid tie only and the other as an eps. Both have access to the battery bank so my large 240 loads can run off the battery with net zero export.
And you're running the 96v battery correct rather than a HV setup that I am after, correct? Would you be so kind as to share your settings with us either by photos/screen shots or protocols? I remember seeing your setup earlier in this thread.
 
And you're running the 96v battery correct rather than a HV setup that I am after, correct? Would you be so kind as to share your settings with us either by photos/screen shots or protocols? I remember seeing your setup earlier in this thread.
I am running two 48v packs in series and 2 sets in parallel. I am travelling at the moment but I should be back in the states this weekend. But I might be able to recall if you have a specific setting you are looking for.
 
I am running two 48v packs in series and 2 sets in parallel. I am travelling at the moment but I should be back in the states this weekend. But I might be able to recall if you have a specific setting you are looking for.
Whenever you get back in town, share what settings you want. I think it would be a good idea to get these units more exposure as they seem to be a great HV alternative if things can work properly between them.
 
If UL listing is necessary, I would make sure you check specifically with Underwriters Labs themselves and make sure they have that specific product listed. Stuff from China is notorious for the completely useless "meets UL spec" stickers, or just outright lying about the certifications.

I'm not saying that's true for these inverters, but I would definitely double check.
 
DYI battery's with a permit required locations ( most of the US now ) are in the rear view mirror.

Solis 5G and the Goodwe A-ES series are the ONLY high voltage UL9540 certified options I know of. There are other options like Tesla, Enphase and Generac but they are are ALL closed systems, meaning they support only there single battery option from the manufacture of the inverter.

The idea of using a ternary battery ( most repurposed EV modules ) is a huge fire risk, and most UL9540 systems use Lifep04, for sure no one will ever get a permit using EV modules the USA
 
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