Great to see this! great progress! I like the height consideration! But, adding the communication port to the site might not be the best solution for everyone. Do you think making this more flexible in terms of having both options in one lid? I know there might be a cost factor but it would give the maximum flexibility at the end. I noticed the plug/cable (RJ45) is bending a lot when having in the heating bag... this site option might not make it better though. I like were you going though! Maybe an angled RJ45 does exist?
Great upgrade. Now next step is a 2P2S or a 2S2P virtual battery. Mine are currently 2S2P. I have noticed that my batteries on the negative side of the 2S have lower cell voltage than the cells in the batteries on the + terminal. All cable lengths are equal.
Try a single post for each (positive & Negative) distributed battery connection. Place the load leads between battery leads. You should see an event better balance on charge / discharge. Busbar will have some distribution issues.
This is great. If you're out of USB ports can you use a hub? Is a passive hub OK or is an active hub required? Any problem mixing a V1 and V2 communications cable?
You can attach a hub, it does not need to be powered each port on the cerbo can attach a 4 port hub so you can have a total of 8 batteries connected. Please see our other victron videos where we show 4 batteries connected via a hub to a single port on the cerbo. Thanks
Ive only seen a few of setups these in person in an RV, that said the way it was setup they had the battery charger on the same post in the bus-bar that was going to the inverter, this was years ago and the batteries were not lithium, but agm's, the system was not solar but more of a backup system. Curious if that setup was correct.
Been doing solar for 10yrs and this is the best video I have seen to explain how batteries charge and discharge, sending everyone that ask to your video Great JOB!!!!!!!!!!!!
Been in the electronics field for some 50 years now, amateur solar for 15-20 years and i learned something new today. Thanks for this video and greetings from Jamaica.
Very interesting and promising looks your developed system presented in the last chapter. I really look forward to see it finished. Will it also be possible to use the JK Inverter BMS in the system before you finish it? Will it also have functionality to automatically connect to the Home Assistant? What capacity your 48V battery will have? For 48V batteries you will have new battery boxes. In your 12V and 24V battery boxes missing mounting options. VoltGo Elite Series batteries have the best mounting system using straight plates and angles between the batteries and the surrounding area. It would be great to have these mounting options in your new battery boxes.
High Temp industrial PLA at 100% infill. PLA is more dimensionally accurate than ABS and works well for keeping things in place. The BMS is placed on a 3mm thick fiberglass plate as its the main component that generates heat in the battery.
@@sfkenergy ok. I was thinking PLA would warp at high temperatures, but not if you’re using the high temperature stuff with annealing. It’s so much easier to print than ABS.
@@jmpattillo the fiberglass plate that holds the BMS is 3mm thick and takes care of any heat issues, the PLA will not become "soft" until in reaches 155F / 70 C. The battery will go to thermal shut down at 140 F / 60 C so essentially the battery will shut it down well before any heat related issues that could affect the structural integrity come into play.
@@sfkenergy thank you. I was thinking more about how it might have a problem in an RV stored in a hot place. However, it’s hard to imagine it getting that hot in any reasonable circumstances.
I believe that you should connect the inverter to the Plus of the first battery and the minus to the last battery. The configuration you have will draw a higher current out of the battery closest to the inverter and will draw the least amount of current from the battery farthest away from the inverter.All wires should be of equal lengths.
I saw your post that you did 11 months ago. You showed that the cable closest to the battery going to the converter puts out more amps on the bus bar that is rectangular. If you made a bus bar that is round with the converter cable in the center and the other cables Perfectly surrounding the center cable would that better distribute the amps? I say yes, as long as the center cable goes straight up and does not get close to any other cables. Electrical current also travels on the outside of the insulation some. Let me know please. It should work in theory....
Why show the wrong wiring, is it to punish the viewer that doesn't watch all the way through. Not a good test because you must balance bring them all to the same state of charge.
Using bus bars only seem to make them more uneven as battery number one is much lower than 2 and 3. The best way to hook up batteries is the positive from the first battery and negative from the last battery... Demonstration two is the correct way
I have 3 SOK batteries and the app will only show 1 battery at a time, that's pretty useful the way that your app shows all 3 batteries at the same time
Thank you sir and you are correct with example 3. In addition you can make the make the battery cable closest to the inverter cable on the buss bar a little longer then you will have equal power distribution. By the way I really love your battery kits I just wish that I could afford them. I am disabled and unable to work anymore so I live on a very fixed income but if I ever come into a lot of money then I will buy 4 of them for my 1967 GM TDH-4519 city transit bus that I live in full-time in the high desert of New Mexico unless there is any way you can help me or we can help each other
Question: I have four lithium batteries (12v/100ah). I have a bus bar like yours (four poles). Do I occupy all four poles with the four batteries, then add the inverter to one of the used poles? (So, the inverter would share a bus bar pole with one of the batteries.) Would that be bad practice? Thanks
