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  1. S

    Rosen Solar from Alibaba, anyone have experience?

    you just need to get forceful with them. I bought 6x 200ah batteries and they sent me 6 new boards (was a common problem with BMS boards). Then one of the power switches failed.... they walked me through it with their technician and once diagnosed, they just asked if I can just buy the...
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    Rosen Solar from Alibaba, anyone have experience?

    I'm sorry you had a bad experience but they are definitely NOT SCAMMERS. I and many others on this board have gotten batteries and have gotten after purchase support. Communication can be slow at times, and you do run into translation issues some times, but they are not scammers. they are a...
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    Settings for Deye off-grid with smart load and generator

    I bought mine from Rosen Solar in China, but they will no longer sell to US (I bought them over a year ago). Not sure if they are UL certified, but I am completely off-grid, so didn't really need that certification.
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    Settings for Deye off-grid with smart load and generator

    I'm in the US - I can share my settings... just need to get back there and write them down.
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    Settings for Deye off-grid with smart load and generator

    Great - I'll give that a try.... I wasn't using the TOU section at all.
  6. S

    Settings for Deye off-grid with smart load and generator

    I have 2 Deye 8k inverters in a fully off grid house. I have a propane generator tied to the grid input and a smart load tied to the gen input for my EV charger. But I have never been able to get the generator to turn on. Even if it’s running it will show 1watt coming from “the grid” but it...
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    Batteries with different state of charge?

    Dunno.... I guess I assumed that the Inverter had a BMS and was doing something since I hook up the batteries to it with a network cable, but I really don't know (Again, I am coming from a place with minimal knowledge). I also thought I read that in another post, that you can use the inverter...
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    Batteries with different state of charge?

    Sweet.... I will try that out next time I'm at the location..... I may also try to run them off the battery BMS instead of the inverter BMS... I read in another post that this might be helpful.
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    Batteries with different state of charge?

    seems to be different batteries every time.
  10. S

    Batteries with different state of charge?

    so how would I correct that.... is this where the reset would come in? I saw that there is a reset button on the batteries, but havent used it.... So if I let all the batteries charge to 100%, and then hit the reset button, does that set the SOC for each battery?
  11. S

    Batteries with different state of charge?

    I never had them working properly before the BMS boards got changed. Essentially batteries started dropping dead from day one, so they shipped me new BMS boards (since the bad diodes was a known issue) and I installed those new boards myself.... but never did any type of reset on them
  12. S

    Batteries with different state of charge?

    Perfect! I'll try that..... With these batteries, I also had to replace all the BMS boards (since they had a batch of bad diodes), so maybe that is what is going on.
  13. S

    Batteries with different state of charge?

    So if one battery isn't discharging, couldn't it be the BMS shutting it down (raising the drawbridge)? Similarly if there is a difference in SOC, couldn't it be that BMS is shutting off some of the batteries at some time after they started to discharge which would account for the difference in...
  14. S

    Batteries with different state of charge?

    I don't have (or know how to access) BMS logs.... but this is more what I was thinking the issue was.... something with the BMS, because it doesn't always seem to be happening all the time. sometimes they all discharge the same, and othertimes there will be one or two that are not discharging...
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    Batteries with different state of charge?

    I’m not sure. I sssume it’s where they may have had to splice the cable together. I’ll have to take a look
  16. S

    Batteries with different state of charge?

    Thanks. I’ll check that out
  17. S

    How should I add 5 more panels to my system?

    Perfect... I was just concerned if there would be some imbalance or something since they are in different directions, so wasn't sure if it would hurt anything.
  18. S

    Batteries with different state of charge?

    Cable lengths are pretty similar. I can double check all the connections etc. I didn't really go down that path since I was thinking it's a problem with the BMS and how they are communicating. This is the only pic of the combiner box I have handy (I’m not at the location right now)
  19. S

    How should I add 5 more panels to my system?

    the existing array to each MPPT is 5S2P. So what I wanted to do is essentially have the other 5 panels facing ESE, and essentially connecting it to one of the 5S2P, so one MPPT will be 5S3P (sorry for the confusion).
  20. S

    Batteries with different state of charge?

    I don't have any pictures..... but they are run in parallel... installed by a professional solar installer based on schematic from Rosen (attached)
  21. S

    Batteries with different state of charge?

    I currently have 6 Rosen powerwalls (48V, 200Ah), though 1 is not working (but thats for another post, and it is now offline). I only visit this property once every few weeks, and it seems like every time I look at the SOC of the 5 individual batteries, some number of them will not be...
  22. S

    How should I add 5 more panels to my system?

    I currently am running my house on 40 panels using 2 inverters, each with 2 MPPTs as shown in the image below. They are all roof mounted and facing south with no more room on the roof. I purchased a total of 45 panels (5 extras), and now I'm thinking it might be nice to add those extras to the...
  23. S

    Rosen 48v Solar Powerwall

    I did. It was the only thing that got damaged during shipping. Luckily it didn’t take too much to fix it.
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    Rosen 48v Solar Powerwall

    yes... I have 2 8kw deyes, 17kw of panels and 6 200ah batteries.... all hooked up and seems to be running well, but I still dont have HVAC set up (should be this week), so that is when the real test begins.
  25. S

    Rosen 48v Solar Powerwall

    I had the diode in all 6 of mine fail. They sent me 6 new BMS boards. My experience is that they’ve been fast to respond to WhatsApp chats but then it takes them a long time to actually act on it.
  26. S

    Rosen 48v Solar Powerwall

    No issues since the replacement. I guess this was a common problem with them. Probably had a bad batch of diodes or maybe they had supply issues during the pandemic and used an undersized one for a short while.
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    Rosen Solar from Alibaba, anyone have experience?

    As far as I know, Rakuten doesn’t sell anything directly…. They just have an affiliate link with other websites. So those websites pay Rakuten to essentially send traffic to them and Rakuten sends a portion of that payment back to you.
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    Rosen Solar from Alibaba, anyone have experience?

    That is how Rakuten works. If you purchase through their referral link, they get paid a percentage as a referral fee, and pass off a portion of that to you. Over the last several years we’ve made about $3000 or so from just making all our larger purchases through Rakuten.
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    Rosen Solar from Alibaba, anyone have experience?

    In my dealings with them I did go through alibaba to get a bit more insurance, but everything has gone smoothly and now I wouldn’t be concerned with paying directly. If you do pay on alibaba directly, you can use your credit card and get cash back or miles and then you can also sign in to...
  30. S

    Deye inverter - no power when batteries disconnected

    interesting.... that's good to know in the future if I ever need to take my battery bank offline again.
  31. S

    Deye inverter - no power when batteries disconnected

    Good thought… I’ll give it a try. Could be that they don’t want to run solar only too because I guess the inverter would then shut down any time sun goes down.
  32. S

    Rosen battery doesn't wake up, is this normal?

    Thanks! Now I just need to find someone who can replace the diode!
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