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I believe the helicoils have a small 'tang' at the bottom you are meant to break off, but how about taking the coil right to the bottom of the hole and leaving the tang on. Add a spot of expoxy(pick your flavour) then screw the stud right down onto the tang...it becomes your stop, preventing you...

So better a 'megafuse' then and simply carry a spare.

Thanks guys for your replies. Somehow i had in my head that if a positive cable( carrying 48v 100A) shorted on the framework, that all the 12v components would be fried before the breaker tripped(simply because it was so much higher). This is why i love this forum....someone always comes along...

Is JB weld better than red loctite or red threadlocker?

Thanks for your input electric.

Yes, but what do you plug into it, that is 15-60vdc and 3A ? I do not want to power from ac adapter, but rather from the dc source of the battery pack.... or...is my lack of knowledge showing....i was thinking that the current needed to be regulated to exactly 3A, but if i connected to the 24v...

@Will Prowse @FilterGuy @snoobler Looking at the operation of these bench top power supplys, you can either use as a regulator source or a steady flow source. In the regulator mode, you adjust the current knob clockwise to maximum, adjust voltage to the value required then connect the load. In...

Ok thanks joey, i was unaware. I will remove the post. thanks I thought it had said, it could 'also' be used as a battery charger? https://www.victronenergy.com/dc-dc-converters/orion-tr-dc-dc-converters-isolated

Looking at the settings above, do i need to change the absorption times at all? It is just that i was expecting, when charging from a low state of charge, that i would see bulk first, then absorption for 1 hour and then float mode, but what i'm witnessing is it going straight to float mode...

Anyone know for sure what the Xuba supplied busbars are made of? (nickel plated copper???)

Just thinking about different cell pack configurations and wondered if the proposed connections in the sketch below would have the benefit i am thinking of??? For the cost of a few extra couplings on the battery pack cells, to me, it offers a degree of insurance/redundancy. What do others think?

Yes, but you would then need to link in your chargery onto the victron shunt for over current protection....imo. Easier for me just to run the two shunts, then no compatibility/calibration issues.

I suppose if you were swapping out all 8 cells from another pack to replace the 8 weakest, within all your packs(going by the data you have collected thus far), could be fruitful, but just replacing those interconnectors with more substantial ones across every every terminal, makes this an...

I thought the 8nm point was because of what had been seen in the eve datasheet, but how do we know that in actual fact 6nm is the stripping point....as far as i can tell, we dont know for sure.

Yeah i have noticed the work you both have done...very commendable. Just one small niggle...i'm trying to reconcile why, when i have top balanced at 3.65v/cell, why my cell pack when charging thereafter, starts to diverge at 3.43v/cell? You would think they would stay closer together up to...

It could simply be called a 'buyer beware' list, but the rest of us know to avoid. It would however be helpful, if whomever was adding said vendor to the list, if an explanation was included, then folks could judge for themselves. The single biggest issue across all sales platforms(not just...

I'm wondering if i could use two copper pipes (22mm + 12mm), putting the smaller one inside the larger, and beat them flat with a mallet to form a solid copper connection bar, to hook 3x 48v(100A discharge rate) lifepo4 battery packs in parallel. Any easy calculators to see if the copper pipe...

I have to report, that using the shunt and pre calibrated settings of the system, have now allowed me to get the chargery reporting as expected. All i needed to do, was to change the WH figure in the settings to exactly what i got, when i got kicked off when one cell reached 3.65v on the charge...

Afraid i would bottle it, if i couldn't do it through CC. That is really the only guarantee/insurance i trust with commerce, simply because my transaction is with the CC and has proven to be reliable in the past.....of course i'm a cynical old codger...lol

Jason came back to me once more and suggests a diode on the negative side as follows... and the comment..."check the cell voltage reading without external battery, then with external battery, check the difference." Any of you electronics folks suggest an ideal diode for this purpose ?

Cheers bob. Fortunately i have a victrom BMV712 which i expect to report much more accurate SOC, so i will defer to that. The chargery is really only there for the LVD,HVD,Temp disconnect etc etc.......so as long as it performs these functions well, i will live with out of whack SOC...

Im not understanding this as i thought the external supply had to be above 15VDC? From the spec sheet page 6.. "The voltage of external power：15-60V, 3A" But thanks for the idea....(y)(y)

So what would happen SOC value wise, if you normally only charge up to 3.47v and discharge down to 3.2v, and you set the battery full/battery empty to these values instead of 3.65v and 2.5V? Would it recalibrate SOC to 100% or 0% every time you reached your own re-specified values? Currently...

It is easy enough when downloading the files to put them in seperate folders, to differentiate them when you look to open the file....so i dont think it is file confusion. I didnt have any other USB drivers installed on that port. The updater loaded up fine, apeared to open the com3 port no...

@cinergi Thanks, thats exactly what i needed/expected....sort of confirms my 0.5mm/cell (y)

Thought this vid was quite interesting...

...

Input the exact WH you got on the first capacity test and the AH reset itself to 100%. Now i've noted over the last couple of weeks that my Wh figure has dropped purely from the BMS 'load', with a corresponding drop in the % SOC, but the AH figure hasnt budged. I'm assuming if i charged it to...

Have purchased a chargery unit....to have the relays wired directly to the remote on/off switching on the units...no need for seperate relays or contactors at all. I like the fact you have control, without all those amps having to pass through the unit....so a great back up to the victron units...

Looking at the temperature table, tends to contradict somewhat, what the CEO of battleborn stated. He said that the batteries preferred around 21degC, but the chart in Will's vid, it suggests a greater degradation, whether at 40% soc or 100% soc at temps above 0degC. Unless, this is the...

Cheers Steve (y)

Thanks, i had seen that for the discharge curves, but nothing in there showing the charging profiles. Upnorthandpersonal posted a chart of 'Winston Cell charging profiles' previously, which i presume will have a similar shape to the xuba 280's, but i'd prefer to see actual profiles of what i'm...

Like you say...the course will still be there next year....good decision, far better to make sure you are too. (y)

Really feel Dacian is missing an increasing market, by not offering a 48v version. As things head to 'all electric' the world over, larger battery banks are going to be sought. :-(

Looking forward to the data that comes out of this project and also the programmability functions of the inverter and charger. (y)

When set at bulk 27.8/float 27.8, does it never then go to float mode, but simply keep on charging in bulk mode? What would be the result if you set the bulk at 27.8, but the float at 27.7, since if the float voltage is below the bulk voltage, no current should then flow...no voltage difference...

See link below for M7 tap. Just make sure you can get a M7 stud in the material you want, as this is an uncommon size. I was getting my flanged stud machined as a special in aluminium....just something to be aware of. HSS Spiral Flute Tap M7 x 1 7mm | eBay

If you had two identical setups, using the same pv panel input and same SCC's, but you set one up to charge at 3.65v/cell and the other to charge at 3.4v/cell, but both had their charges terminated by a BMS exactly when their respective first cell hit of 3.4v, what would be the expected...

I'm assuming there arent any issues using a standard domestic fridge on a mobile motorhome??? This looked quite efficient to me...(annual energy consumption 62kWh), plus greater volume at less than half the cost of a dometic type...

Sorry steve, i should have made clear...this was jasons reply purely on how to connect my 24v battery pack directly to the dc input(external) socket. EDIT....clarification from Jason below

By the way, i meant per £/KW, not just 'simply dearer' because they were bigger....lol.:cry::cry::cry::cry: Normally you would have thought it would have been cheaper purchasing more capacity!!! Think we best get the thread back on track now. :)

I might still do that....depending on final loads etc. Thanks.

Are 'brass' lugs acceptable when connecting the very thin balance wires. I've spotted ones that will allow me to get a really good connection and have a larger surface area for contact? Any real downsides to using brass, for the BMS balance wires?

@snoobler Lucky lucky you. Do you think charging all your cells to the same 3.65v individually, but at the same time/temp/conditions etc, will in theory at least, give you the perfect top balance equivalent? This is interesting.

EllaBella, any plans to charge your 48v battery bank from the alternator? Plenty of 12v-12v systems about, but 48v seems to be a bit convoluted to me. Just asking, as i'm planning a 48v system myself. With Solar pv being the only charging source whilst wild camping, the added bonus of alternator...

Maybe the lower Amps ones are good for maintaining balance thereafter, but you have to get the cells 'there' to start with???

Thanks for the input HaldorEE....fafrd put me wise already. (y)

Also of note, i'm sure i read somewhere(cant find it now:() that doubling up the xuba supplied busbars does not double up the ampacity, but gets you in the region of 175A. Anyone care to confirm this? You end up with so many nuggets of info on these threads, you lose track of them:cry:

@JeepHammer Care to suggest one for a coil input of 12v 0.8A (that covers me which ever way i decide to go). Thanks