Lately I noticed a burning smell so today I checked with the infrared thermometer the battery cables on the chargers and the + was much hotter than the negative that was just 25c. So once the sun was down I turned off and removed the cable. It looks like burned. Checked all bolts. The negative on the bush bar took a bit of tightening (1/4 of turn max). Any idea what might caused it?
These are 50mm2 H01N2-D cables (recommended is h07v-k 35mm ) on a Bluesolar Mppt 70A and an oversized array of 2.7kw, so it runs for maybe 2hrs at maximum output 2KW 70A.I have an external fan hitting the device with a timer since installation,given it does does have any fan of its own. Since the cables were too thick to fit the terminal, I chopped off enough strands to fit. I have not used a terminal because it looks like the terminal of the BlueSolar is some kind of clamp pressuring like square? the cable so if I put a cylindrical terminal there will be less contact??
System is operating since July 1st 2022, this happened
Hi is it possible to connect 3x JKBMS to a Cerbo for BMS control?
At the moment i just connected them via BT (ESPHome) to HASS, but that just gives me alarms.
Would be nice to get slow down charging and other features as well.
I got three 8S Packs in Parallel. If it's not possible, maybe someone knows other ways to get it to work.
first of all, sorry for my english.
Im Gian from Switzerland, building an Expeditions-Mobile of a Bucher Duro (Ex-Swiss-Military-Truck).
I bought 8x 400ah Winston Cells with REC BMS which is compatible to all the rest of my Components which are from Victron: 5000W Multiplus II, Orion, Buckboost and so on.
Due to space limitations, i would like to separate the batterybank in 2 blocks.
The cells will be connected in SERIES to achieve 400ah on 24v.
Someone told me to look after exact same cable lengths and that its not good to separate the cells in two blocks because of the much bigger Reststance between block 1 and 2.
I then tought its only a problem if wired in parallel but he told me NO. Its the same issue when connected in series.
So whats correct? I dont wanna risk anything.
The two blocks would have a distance of about 70cm (27.5").
The the cells will be connectet with the original winston linkbars which are very short. Except of the two blocks which are connected then with a 70cm long cable.
Is this a Problem or not?
If not, what cable size for the 70cm should i use?
thank you very much for your help.
I bought two Multiplus II 48/5000/70. On both inverters, the connection terminals to Battery missing(or not?) connection plate. Please check attached photo.
Unusual design of the battery connection terminals or a incomplete series.
Never before seen that type of connection. Is it ok or defective series?
I would like to buy these lithium batteries: "16 pcs 3.2V 280Ah lifepo4 battery 280AH" to replace my "8 Ultracell UGT 275 Ah 12V" now exhausted, for my 7.4 KWh system with VICTRON 3 kwh Multiplus 48/3000 INVERTER , Color Control GX, BMV-702, .....
Can they be compatible and easily configurable?
I've already done a couple of installations which all runs fine. I always stick to the "Unlimited wiring" guide for best DC / AC cabling. Normally there is plenty of space to have one big battery bank with equal DC lengths (f.e. multiple Pylontech + Victron Lynx).
Now I will install a bigger bank on a boat (catamaran) and would like to know which way would be best. Both options have pros & cons, maybe there is a third option I don't have in mind.
There is a bit space in each hull and in the middle of the catamaran. Which makes me have 4 spaces for the batteries.
Each battery pack will have it's own BMS. In total the battery will consist of 144x 280Ah Lifepo cells.
Keep in mind that in the schematic are no fuses and kill switches. Surely they will be add in the installation.
The normal use during driving will most likely draw only 2-4 kW in total. But the system has to be capable of maintaining 6kW to both engines over a couple of hours if necessary.
Left Option like Page 19 at wiring unlimited "Diagonally":
- should make equal current on all banks
- only one battery monitor (shunt)
- horrible long cables, about 28m for each + and - cable to the bus bar. Another 9m for each engine (just 125A)
- a couple of volts drop even with 120mm2 cable
Right Option like Page 19 at wiring unlimited "Busbars":
In this case the cable itself is the busbar.
- shorter cables
- 4 batteries in Victron System (not a problem at all, monitoring will be through (modified) MarineMFD App on a Raymarine MFD)
- unequal usage of batteries
- batteries in hulls will be discharged faster and get less charge than center batteries!?
I think (hope) last point shouldn't be a problem when laying on anchor the banks should be equalling themself, right?
Anyone tested this?
I also had the idea to build real separate banks and use Orion 48/48 to charge the banks for the engines. But the Orions are really getting only near 90% efficiency and I think that is a bit to much inefficient as the engines will be the biggest consumers.
I put a Cyrix-Li-Ct between starting (lead acid)and house batteries (LFP). But the Cyrix never connect the two batteries even when the alternator and the starting battery is at 14.4V!!! Same thing if the house battery is at 14.4V by the Victron MPPT on solar panels.
Of course when I push on the "start assist" the Cyrix connect for 30 seconds.
As my LFP battery is not Victron's one the BMS is hidden inside, so I cannot connect the BMS on the Cyrix-Li-Ct!
Any chance to fix this problem?
Is there such thing as an XLR adapter for the victron blue smart chargers?
While rewiring a Multiplus-II installation, I broke the Bat- screw, not by over-tightening it (I use a dynamometric wrench), but probably while guiding the 35mm2 wire and rotating it many times. I thought the nut was sufficiently hand-tightened to prevent the wire from moving, but apparently not...
Here is the result:
My plan to repair this is either:
What do experts thing about that? What kind of soldering iron do I need (20W, 50W, more)?
Since this setup allows for 35A sustained charging, 50A sustained discharging, and 115A peak discharging (PylonTech battery at 48V), I hope that will be OK...
My boat had installed an old battery charger with 3 outputs but was only using one of them connected to an isolator, which was feeding 3 lead-acid batteries 120 Ah. The battery charger collapsed and I substituted by a IP22 12 V 20(3) Victron charger. There is any reason that I should keep this type of connection or should I eliminate the isolator and use the 3 output to charge individually each battery?
While trying to connect everything I realise I made a mistake on the first cable, so I'm trying to make sure I got everything right before returning the wrong cable and buying the right ones.
Cerbo-GX <--> Pylontech US2000C : I need a "VE.Can to CAN-bus BMS type A Cable 1.8m" from "BMS.Can" port to "A/CAN" port right?
Multiplus-II 5000 <--> Cerbo GX : I need a RJ-45 UTP cable right from MP's "VE.Bus" port to Cerbo's "VE.Can" port right ? Is this just a standard Ethernet cable?
Fronius Primo <--> Cerbo GX : I just need both device connected to the same network through their LAN ports? Is it enough if both devices are on the same WiFi network?
Thanks for the help !
I have 3x multiplus 5's connected to a 48V lead acid bank.
What is best option/ way to wire from battery bank to lynx distributor? Cable size req works out to 185mm for 600A surge power? Seems too big an hard to work with?
Currently have 2 of the BlueSolar PWM-DUOs rigged up in parrallel, so each one has a connection to battery bank 1 output and battery bank 2 output.
Is it acceptable for bank 1 and 2 to have different Ah capacities?
Specifically 10Ah 24V on one and 32Ah 24V on the other.
I need to connect an AC inverter to a system with 400W solar (24V) and 100AH battery (24V) to source some DC pumps (24V, 5A max) and a DC-AC inverter supplying 20W @120V AC..
Can these go to the load output of the controller or do I need an external load dump relay and is there a control from the MPPT 100/20 controller? How to connect? Can i use the Victron Battery Protect 12/24-volt 65AMP?
I have a 17' travel trailer. We use the battery only for some basics, mostly to pump shower water in the evening, run the fridge thermostat and sometimes to run the heater fan at night. I am adding a 100W ground solar panel and a Victron SmartSolar MPPT 75/15 controller. My thinking is to take the cables that currently connect to the trailer battery and connect that to the load of the new controller. Of course, the battery and panel will then connect to the controller. However, when I plug the trailer into shore power or the trailer is being towed, current is sent to the battery to charge it. With my proposed setup, the shore or tow power would need to enter the controller's load port and make its way then to the battery. Will that work? If not, do I need to instead have the trailer's current wiring hook up directly to the battery, thus bypassing the charge controller?