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Well.... If the BMS has the necessary protection, then comms to the inverter doesn't really add anything. You can most likely pull data easier just by talking directly to the BMS to whatever system you desire, be it HA, Node red etc. Do you have the SG01HP3 currently? I've sort of abandoned my...

Although the majority of inverters utilizing HV battery setup probably needs comms with a BMS, the Deye inverter actually doesn't and offer a pure voltage setting, even for this 50kW beast.

I think that might be different for HV vs. LV inverters.

Alright, so it seems the people posting on their facebook isn't the sharpest when it comes to English, so I think what they meant was that there are HV options available too and it's not the ones listed. Their HV option with 48V battery packs is called BOS-G and comes with a dedicated controller

I know, Deye unfortunately still have a long way to come on their documentation/communication side, but they confirmed multiple times that these can be series connected.

For example: https://www.deyeess.com/product/se_g5_1_pro

There are 48V batteries out there with BMS that support series connection, so I figured it also existed in the DIY space, but it's slim pickings here :D

Hey guys, I've finally completed my 3x 12kW Deye inverters with 3x Seplos MASON 280 DIY kits, and I am now looking at the next shiny thing, the Deye SG01HP3 50kW to run our whole installation instead :D It runs on high voltage batteries (150-800V) and I am wondering if anyone knows of DIY BMS...

Then the 3 batteries would run different SOC all the time and if one inverter failed I'd loose a battery too. If one inverter had a full battery but excess power, it couldn't feed into the other two. I can think of 0 advantages of doing it like this

You can't think of an advantage of parallel connecting batteries? :unsure: I'm not sure how to respond to this? How else would you connect multiple batterypacks to one or more inverters?

You're welcome and thanks. I wouldn't know, you'll have to ask Victron Denmark. If the system is grid tied and export is possible on the port connected to the grid, then you need to have it approved. Simply setting 0 export wont suffice.

Hi SV, Nearly there :D I ended up with 3x Deye 12kW SG04LP3 inverters and I was in the midst of the governmental approval process for them, along with Deye, when someone else beat me to the punch, but no matter, the goal was the approval of the inverters so we could export excess power :D I am...

The final ground mount is now installed and was overall a very good experience with high quality gear at a great price. I can completely recommend purchasing through Artsign for your solar installation needs. Note: I am in no way sponsored, nor do I receive any sort of kickback for kits sold as...

Landscape I could do 2 panels in height with 35 degree pitch without needing extra equipment for mounting. We also didn't want the arrays to have too much height. Other than that, I don't think there's any :)

It's actually 3 separate ground mounts, of which the first has been completed today(still need to do wiring etc) but the roof mount is up and running our barn and workshop in off-grid mode until our utility provider has processed our solar registration.

Install so far has been great, we've completed the roof installation and part 1 of the ground mount(2 more to go :D) Everything is high quality and I am very happy with it. Everything fits together very nicely and we even made a mistake on one of the concrete blocks distance to the next, we...

I finally got my gear! It seems like really high quality. The feet for the ground mount is preassembled and everything seems heavy duty and good quality - having never had actual mounting gear for solar cells in my hands. Now for mounting! :D

Yes exactly! :) Except 250 between inverter and busbar and 200 between battery and busbar

That's funny, I was actually looking at it on Aliexpress :D

I have a qualified electrician that works with solar most of his time to size the breakers and wires for me to make sure I am up to code and what not, so I'll just wait and see what he says.

Isn't this exactly what a breaker does in normal operations in a house? It trips due to something going wrong, then you rectify that error and then you turn it "on" again once the reason for it tripping is fixed, instantly having it under load?

Well, it doesn't eliminate the resistance, it just changes it to a fuse(which also has connection points) instead of crimps plus cable. I'll see what the installer comes back with on the breakers front and take it from there. I can always upgrade the Lynx Power In to take fuses if need be.

Danish regulations is quite different from US I believe. I'll be buying 2 and doing it "right". 200$ is nothing in the grand solution. I just didn't wan't to pay through my nose for encased copperbars with a few bolts on them.

If you're talking about using this as a connection it probably wont fly as it's not inside the enclosure I don't mind getting 2.

Why wouldn't I trust rated equiptment to do what it's rated for? We are not talking pv side right now, just batteries :) The inverter has a manual switch for PV The BMS has a disconnect in case of +215A hitting it and a shutoff function. Idk if the shutoff will protect it though, not counting on it

I am planning something like this I don't really want fuses in my system if I can avoid it, would rather have breakers trip in case of a fault. I don't see the distributor adding anything to the above scenario?

Yes

I don't really need neither the shunt nor the distributor. The logic of my setup sits in the inverters talking to the BMS's. What would I gain from adding these components?

Thanks, but still shipping from the US to here + customs. Might as well grab the Victron Lynx Power In :) But thanks

Yeah, that's exactly what I am saying :D

Also just a note on this going back over these posts: If you put these in parallel using their parallel cables, make sure that you don't pull 1C from the batteries, because that would melt the 50mm2 cable that comes with. I would say max 200A from the whole pack(they are rated at 250A, but...

Yeah I was also watching that one, maybe that was part of what jumbled things for me :p Idk about the fuses though, I'd rather want breakers on "both sides" I think. Edit: also since brexit I don't think it makes sense for a european to shop in the UK. It's a few bucks cheaper over there, but...

It's another batterymodel that they make as well.

If you got it at that price, it's pretty great. I got a price list and unless it's already outdated, you can only get that price if you are buying more then 15 units. They are charging 192USD for a single 280Ah cell and 164 if you are buying more than 100, which is partly the reason for my...

Does your invoice say 2700USD for a 280Ah MASON battery? If so, that's a really really good price....