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You should get another pack, split it down and use it to replace to two duff cells(use the two cells which most closely match your current pack), then build a 12v back up pack with the remaining cells for something else. That way your 'main bank' is as closely balanced as you could get...

schucks....was panicing nicely as he put the metal tape measure across those terminals(almost) when measuring them @6:43 :eek:

Yeah...very good point gazoo....

The first step say, set the power supply to 3.4V ref this as regards the minimum voltage needed to charge https://www.solacity.com/how-to-keep-lifepo4-lithium-ion-batteries-happy/ It states the following.. "Charge Voltage Needed So what Voltage is enough to get those ions moving? A little...

Further to my post 209, i discovered i had a problem with one of my flanged studs. It appeared to be slightly warmer than all the rest of the studs at 108A discharge. Upon investigation, i found that a had a miniscule gap between the flange underside surface and the terminal surface. I believe i...

We're all willing you on mate....great project to follow. (y)

@Haugen, Thanks, the studs have a flange on them, so that it is not possible for me to over tighten them. I opted for this for the very reason that, if sometime down the road(several years) i was checking the tightness of battery connections and the loctite or epoxy had failed, i would then be...

I didnt take any offense whatsoever....just pointing out that whilst the warnings weren't valid for yourself, it did highlight to less experience to read carefully, keeping in mind the rest that read it. I totally love the expression of ideas and experimentation, but i get it that you may have...

I guess what most RV'ers want to know, are there any downsides or benefits whatsoever to running a substantial cable from the negative bus bar to the chassis on a 12/24/48v DC system? By the sounds of it, totally un necessary for RV conditions, but any detriment to having it anyways?

Many thanks for your reply Electric.

What insurance is there included with 'Wire transfers' or Online bank transfers, if 'x' manufacturer, 'y' overseas transport or 'z' local logistic co, screws up and order is lost, stolen, damaged etc etc etc(they all like to take a step back and blame each other). This is so disappointing that...

That is bad news. She was their USP from the point of view of inspiring confidence. Folks are vary of dealing with chinese companies and her reputation went a long way. Disappointed. :cry:

Thanks craig.

I'm going to make the following board(see below) since my RV/camper will be parked up for long periods during winter months. I want to power everything down, except the BMS, which i would prefer to be powered and monitoring cell voltages. By going this route, if my cells get too low, they...

BiduleOhm, a very big thank you for going out of your way to source that info for me. It is guys like yourself that makes this forum great. Kudos to you. (y)

Thanks a bunch, getting the point now.(y)

Yes the test conditions are unambiguous, however if you scrole down the datasheet further to electrical performance, then normal discharge at 0.33CA =100% capacity, 0.5CA is > or = to 98% capacity.....so for me, most of these are checking out to spec if they at least meet 98%.

Once my pack is installed in my RV, they wont be coming back out to be parallel top balanced, plus i wont be taking off the connections(i like to keep the connections tight) in order to parallel wire them. Thus, my intention to only charge to 3.4v/cell, which is well inside my limit before...

Many thanks, for explaining it in laymans terms...much appreciated. (y) That focusses me onto one design only. :)

Yes, this is how im planning my own, and why i had to divert from an 'all in one' unit to a seperate SCC & Inverter/charger. Makes it so much simpler and cost effective.

I would have thought that a simple 'silver' washer between the post terminal and the cable or bar connection would eliminate all galvanic corrosion. If the heat shrink is applied right up over the lug shoulder, how does the atmospheric 'salt' get into the cables(im assuming the cables never get...

https://www.copperbraid.co.uk/product/copper-braid-earth-strap-50-mm2-250-amps/

I believe that if you have the latest software update, you can power the BMS down, then on resumption of power later, all the settings are retained. I might be inclind to do so myself, except, unfortunately i cannot get the software update and hence i would need to reset all the settings. This...

I think if cells are within 98% capacity, folks have 9 capacity tests to run before complaining..3 each 0.33CA, 0.5CA & 1CA discharges respectively. I also read something, somewhere in this forum, that as the individual done more testing, their figures came up, the more cycling they done, but i...

Because i was using a 10A bench top power supply, i opted for to go straight for 3.65v in my parallel top balance. This gave me the highest starting amps(5.8A) and wattage input. Since i was not going to be inputting above the 0.05C on the xuba 280ah cells (that gives the indication of reaching...

I've just recently sent for a torque wrench that does 5nm - 25nm and calibrated to within 4% of spec. Now i'm wondering if i need to set it at the minimum 5nm instead of the 8nm i assumed the xuba spec referred to. Stripping three threads is a nightmare and goes to indicate the lack of...

No mention on Will Prowse top balance video, of using thicker leads than those supplied with the PSU. If this is such an important factor, perhaps it should be highlighted, since it is being watched by thousands that think 'you cant screw it up' (comment at 4.26 in the video), means they are...

Coincidentally, i was looking at these earlier on.... dont know how much 'antislip' they would be? Https://www.alibaba.com/product-detail/walkable-solar-panel-110w-anti-slippery_62179084828.html?spm=a2700.7724838.normalList.26.21bb61f5j0qfU6

Exterior not aluminium. It is a converted minibus VW crafter....so thin sheet steel id imagine....typical van.