Hi, I am looking for some guidance on how I can use the Vicrton M10 busbar to connect 3 x inverters and 3 x battery. My understanding is that I connect the batteries to the positive and negative terminal but I need some guoidance on if I would have to connect the inverter to the Victron M10 as well. Any guidance would be truly appreciated.
Thanks in advance
Hello and welcome to the forum 
If you take a look at the Lynx manual…
but of course, the + and - terminals on the Lynx… each + one is fused.
https://www.victronenergy.com/dc-distribution-systems/lynx-power-in#downloads-manuals
Thanks for your response, so if I have 3 batteries I will be connecting the combined battery load into one of the DC +/- and the 3 x inverters 1 per +/-? My confusion was using it as bus bar where each battery connects independently but I guess this is wrong since the inverter needs to be connected there as well.
Thanks again for your response
That always depends on your system. What kind of batteries are you using?
If each battery has its own fuse, you can build the whole thing differently!
What other components are you using on the DC side… MPPTs? Etc.?
You should always mix up the components on the DC bus a bit or improve the current distribution by placing the batteries in the middle and the loads on the outside to better distribute the current across the DC bus.
The battery measurement will determine how you configure and expand your system with multiple Lynx units.
If you have a very accurate BMS, you can certainly do without the shunt. However, if you do need a shunt, that changes everything.
In that case, the three batteries MUST be connected behind the shunt—either via a separate Lynx unit or another distributor located after the shunt.
Like this … System to the left (Multis,Mppts etc) … all batterys to the right
My batteries are 15kwh 300A with 200A of max continuous load. My current system has 1 x gBat 200A fuse disconnect for each battery and a 600A DC MCCB for the combined load. I’m looking for a bus bar to have things more efficient and that’s when I saw the Victron M10. I have 3 x 6.2Kw inverters each with it’s own PV array with 9 x 550w, 700w, and 730w per inverter (these panels were for three sites but ended up on one site)
What would be the recommend way to use M10 in my use case?
“I have 3 x 6.2Kw inverters each with it’s own PV array”
Are these 3 Inverters Grid or DC Inverters ?
Other Victron Stuff like a GX ?
These are pan power off-grid hybrid inverters
The Victron Lynx can handle up to 1000A… so that should be enough 
So you’ll need at least 2 Victron Lynx M8 distributors with the necessary conversion kit of bolts and washers… it’s cheaper, and if you don’t need fuse monitoring… it’s perfectly sufficient.
Maybe you could sketch out a quick freehand drawing of how you envision it…
Also check out the Adler EF3 fuses for the protection… they’re better suited for high breaking currents and fit perfectly into the Lynx
I am trying to understand how implement it in my environment, my understanding is demonstrated below.
Battery 1 ─ 200A gBat fuse┐
Battery 2 ─ 200A gBat fuse├── Parallel Battery Bus ── 600A DC MCCB ── Victron M10 (connection 1)
Battery 3 ─ 200A gBat fuse ┘ ├── Inverter 1 (connection 2)
|── Inverter 2 (connection 3)
|── Inverter 3 (connection 4)
So you don’t need any fuses in the Lynx—you’re really just using it as a distributor… but that’s fine.
The main thing is that you connect the large cable lugs from the battery wiring to the Lynx… what gauge are we talking about here with up to 600A
Of course, you could also use the two outer connection points for the large wires from the Batterys …
If you need to make it more compact… use two Lynx m8 units as described above and Adler Ef3… connect all the batteries and inverters individually and reduce the cable cross-sections…
Just finished a more visual sketch, as for the gauge the installer recommends 2AWG (35mm2) which for me is too small for the current from these batteries. I did know that I can use the outer connection thought that was used for expansion.
Let me know if my sketch is okay for my use case, I don’t have fuse coming from the inverter so It may make sense to add fuses between the M10 and the inverter similar to the battery setup or use the M10 with fuses. Based on the amazon prices it’s just $7 difference between the M10 and M8.
The difference between M8 and M10 is ONLY the connecting piece at the connection points and has nothing to do with the bolts in the Lynx…
You can also install fuses in the Lynx… Use a conversion kit with bolts and washers and install fuses for the inverters INSIDE the Lynx… it’s very simple
and 35mm would be way too small for the Batteries … ok for the Inverters … but not for the large batterybank
First … change the wiring for the + and - diagonal …like this … + to the first Battery … - from the last … or another way around …
This way, all batteries are charged and discharged equally.
Is there anyone near you who has a Victron or some experience with it?
If possible, protect each battery with its own MCCB so you can shut them down individually; otherwise, your entire battery bank will shut down in the event of a fault…
Lynx are available on amazon and Adler EF3 Fuses with 150A too …
You can find the conversion kit for the bolts and washers online, and you’ll need to adapt the cables and cable lugs yourself using what you already have from the other systems.
Is there any Communication between the BMS and the Inverters ?
Best Sollution with 2 Connected Lynx and Adler EF3 Fuses in the Lynx and a nice ans short wiring … do you need the MCCBs in the Wiring ? I don’t know how much space you have available or what the technical requirements are on site…
Thank you so much for the detail, I already purchased one Lynx distribution M10 from amazon will proceed to purchase the second one so that I can use your recommendation.
Regarding your questions, there are no one who has a Victron or experience with it that I know of in the Philippines. For battery protection I have gBat fuse+disconnect for each individual battery do I still need the MCCB for this. My understanding is that the gBat fuse handles the ARC better than the MCCB and for that reason I went with the gBat fuse.
There is communication between the BMS and the inverter which uses MODBUS for communication, the BMS is integrated in the battery and so far this has not been an issue.
With your 2 x Victron Distribution recommendation would I need the 600A MCCB that I current have after the parellel bus as demonstrated in my initial sketch since the batteries will be connected to an individual connection on the Victron distribution bus bar? I have some space in the closet and the entire system is being redisgned for safety.
To give you some context, two days after my system was commissioned I had a fire and quickly discovered many short coming in the system and had no safety or failure domains so did some reseach and went out and purchased the following.
I am disigning around safetly layers so I am opened to any suggestions/recommendations, honestly, this is turning into a DIY since the company that I used and the other companies I reached out to seems to be using a standard sizing breaker regardless of the system capacity. For example, my first system had a 5kwh 100A battery they used 35mm2 cables with 125A breaker, for my 15kwh 300A, they used the same, the same for PV arrays, they also used the same breaker
even though the Amps were different and required 20A and 32A all had 20A.
The property does not have ground (typical in the Philippines); therefore, the SPD grounding is just hanging so this is also something that I am working on and purchased
2 x 5/8 copper rods
1 x Grounding station
10 meters to 30mm2 bear copper from the grounding station to rod1 and bounding to rod2
bouding bars for each panels, all PV earthing including the Victron to the grounding statiions (shortest path), and all panel bounding bar to the grounding station as well. Only the main bounding bar will connect to the neutral.
I looked at the Adler EF3 fuse and don’t see anything at 200A, I chose 200A fuse because that is the battery max continuous load and the BMS trips at 210 therefore, I don’t want to rely on the BMS as the primary protection. Is the Victron distribution compatible with any other type of fuse or should I use something externally? for example the MCCB between the inverter and the bus bar?
I would set up the DC side as shown in my picture… cables for the batteries and inverter should be as short as possible but of equal length… Adler EF3 in the Lynx and only the gBat fuse+disconnect on the battery…
No MCCB… those always create connection points and contact resistance that cause problems with such high currents.
A central MCCB would always shut down the entire battery bank… not a good idea.
The 200A fuse size is fine… In the event of a fault, much, much higher currents flow… and the fuse is actually only meant to protect the line from overload… not the battery or the inverter.
Maybe you take a look at…
I need to rethink the AC side… Different countries, different rules and technical conditions…
It’s similar to a TT system here in Germany… no PEN in the supply line… grounding directly on-site…
Thanks very much for clarifying, I have already purchased the second DC Distribution, initially I thought that I would need something between the two but saw a diagram where they are connected directly. My only concern is the EF3 fuse haven’t seen any in 200A that can be used for the connection for the inverter side. The biggest I saw was 150A would like to have the fuses the same between the battery and the DC distribution and within the DC distribution for the inverter connection.
Now that I am going with fuses and eliminating the 600A MCCB, what are my safety option to shutdown the battery bank in an emergency since the gBat fuse cannot be disconnected under load. Is it as simply is turning off the battery and disconnecting the gBat fuse?
If you need to work on a battery bank, I would always turn off the individual battery bank first and then disconnect the gBat fuse. If the 200A fuse trips in an emergency, something has already gone wrong, and the BMS is faulty and failed to shut down via the FET stage on its own.
There are also fuses with a “blowout chamber” … so you could pull the fuse even under load … but in my opinion, that’s unnecessary. Like the Siemens 3NP11311CA10 …
On Amazon, there are some up to 250A … in stores, up to 700A …
I have always been working to have the fuse go before the BMS. For example, if the BMS trips at 210A I would go with 200A so that the BMS is never the primary failure point because in my mind it’s better to replace the fuse than to deal with any potential issue with the BMS.
Thanks again for all your help, I truly appreciate the professional and honest feedback and guidance
