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Oops just changed to opposite sides

I've just set my cut-off to 11v, perhaps its just the inverter and the stuff using it pulling a surge of power briefly, which triggered my high LVD. Currently running the TV, Laptop and Inverter and it has yet to disconnect. Lets see how she goes, thanks for all the help. Will report back with...

Jesus I didn't realise it would take 2 weeks to charge them. This is gonna be awkward on a boat...

It allows you to only set a cell disconnect, then it derives the total voltage disconnect from it, which is not settable itself. :)

Just ordered the cells and the BMS. Going to get a victron smart shunt and battery sense too. Thanks for the help, wish me luck :)

Top balancing is going well I think. Wish I had a grid option though, gonna be a fair few hours on the generator.

You may need to reset the BMS by shorting B- and P-

Apologies, typo there, I meant 12v 4s. :)

Hi all! I've got my new lifepo4 battery bank installed and connected to the inverter. Everything seems to be running fine until I try to charge my macbook pro, at which point it seems the BMS cuts all power from the battery and everything shuts off. Could anyone advise why this may be...

Batteries are almost fully top balanced at 3.45v in parallel. I have another question though. My Victron Smart-Shunt is not arriving for another week. Is it a bad idea to install this battery as-is for now and then just charge it up to bms cut-off again before installing the shunt? Thanks in...

I've hit the high voltage cut-off in series, just reconfigured to parallel and accidently got a big bang when i shorted a cell. all appears to be charging now though. Not sure how long the parallel charge will take. Really not looking forward to have to capacity test these cells and charge from...

That makes sense if mine cuts out at about 20-30% short. Guess I gotta upgrade.

1: Self build 280ah Lifepo4 Cells - SOC was charged to 100% a few hours ago and very little usage since 2: I've just noticed that it happens when the tv is on too 3: Yeah the BMS has an app. I notice the current out sits at about 8-9 amps, then (and this is strange to me) the pack voltage slowly...

Hi all! Today I received my new 4x lifepo4 280ah cells. I live on a boat and have 2x victron 100/30 mppt solar controllers and a sterling 20a battery charger. I want to top balance my cells from the generator and maybe the solar (its winter in the UK). I cannot really afford a bench power...

12v pack also, should have stated that earlier.

I've rearranged my cells into parallel but do not have enough bus bars, i've used a spare set of wires to connect the cells but 2 of them are at 3.36 and the other 2 are at 3.41 now. Should I expect these to level out? Power supply is currently supplying power at 3.6v (can only charge to 1...

Hi all! I remember hearing a while back that you can power large loads from your batteries, even if you have a small BMS, by powering a relay with the bms output. Is this a viable and/or recommended approach, could anyone elaborate on the set-up? I have a 100A Daly Smart BMS that cuts out when...

Is it a smart BMS? It could be going into sleep mode. However I assume it should wake up if any current is pulled or pushed into the batteries.

Hi all. Up until recently I have been using a 280AH Lifepo4 bank on my narrow-boat with a Daly 250A BMS. Over a winter and a year or so, I noticed that I did not give the batteries time to balance and they had eventually gotten so out of balance that I felt the need to do another top balance. I...

Yep it is an inverter, here is the link https://www.sunshinesolar.co.uk/Item/C150012 :)

Will do that now, i've just tried a heat gun on the lowest setting directly from the inverter socket and the power cuts out immediately. About half a second. Unsure if the batteries could sag that fast.

Thanks for the help! I got my daly bms all hooked up and activated. However it has now appeared to go to sleep and bluetooth is not working. Does anyone know how to wake these up? TIA :) P.S: Bench power supply is in the mail!

Hi all, In my setup I am unable to easily get the temperature sensor on the cells for my battery. Does anyone know if it is possible to extend the temperature sensor using wires, or will this cause a change to the value? Cheers!

Thanks mate! Do you happen to remember what wire size it is? I can wing it if not. :)

The battery appears to be sitting at 13.1v even with -15A current being drawn... This was definitely causing the power cuts earlier today that caused this post.. I'm very confused now. Running the battery charger and the TV at the moment...

Ok i've got it to happen again now. I do see the voltage at the battery terminals pulled down to 12.9 briefly, then 12.6 for a split second before the BMS shuts down. Otherwise it sits happily at 13.1v regardless of the current i'm seeing drawn. Also its worth noting I haven't had this issue...

I'll do this test now for each cell. Top balanced the cells using a bench power supply and then charged to 14.6 using a sterling procharge ultra until the current hit 0.

Side Note: I'm not sure if this is a point worth making, but my 12v fridge just turned on, drawing about 7 amps and the battery is not breaking a sweat. 13.1v and chugging along. Maybe its a faulty inverter...?

I set it specifically in the app because... i saw it somewhere in a thread on here? Could you recommend a LVD?

Hi all! I'm a new member and live full time on a narrowboat in the UK. My sealed lead acid batteries have finally bit the dust and I have been wanting to make my first Lifepo4 bank for a while now. I have a few questions I was hoping to get some advice on. I want a simple setup that I can use...

Can I delete these damn double posts?

I've been doing as much research as possible over the last month or so, fairly confident. I have already derated it, thought the 100a model would suit my charging sources as they wont push 50A. Also we run no high loads on the boat through an inverter (got a 7kva diesel generator for that) so...

So he puts them in 4s blocks and charges to 95%, then puts them in parallel and finishes the charge. Two questions if I may: 1: How does he know 95% state of charge in a 4s block that hasn't yet been balanced? 2: Is there not a risk of overcharging a cell while in 4s configuration? Thanks! :)

Cell volt disconnect = 3.1v Sum total volt disconnect = 12.4v With the new daly BMS smart bluetooth thingy, it seems most parameters are configurable.

Is there a reason for alibaba over aliexpress? I've never heard of it in the UK. I thought aliexpress is for international shipments to eu/uk and such... Bit confused now haha

Excellent, I've got that all set. Just wanted to make sure it wouldn't cause issues when it came time to install the shunt.

I may be a newbie, but I think if you did get a daly, then used a battery protect and parameters on your charge controller you could avoid the BMS cut-off entirely and keep your batteries in good condition. I also went down that rabbit hole and realised I just want a BMS to keep it balanced and...

Update: yet to have a LVD, but when running 80A through a heat gun it did cut off, maybe because its a daly and isn't actually able to handle the claimed 100A?

Hi all. I have my lifepo4 setup working for a few months now but i've noticed that if I draw more than 70 amps from my 100a model, it cuts out for over current. I have a 2s daly smart bms 100a. Is this common with daly or could it just be my unit? Thanks in advance!

Haha nah, its just the light from the door crack. That's the plan, however the cells are looking like they're staying in balance so i may not need to parallel

Thanks! Yeah I have heard that clamping can help with swelling, however I also heard that swelling only occurs over time with high current loads being used. Is this the case with low loads also?