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Thanks for the suggestion, and I'm sure I could modify my used vacuum to work with this delicate LV 6548 and Server-Rack 48v battery bank, but it seems like it makes more sense to just use the Jackery, since it could run it fine. Sorry, I don't mean to be dismissive about your suggestion, I'm...

I just ordered a set of 8 (150amp-hour size) batteries and AliExpress said the order has shipped. ETA is sometime later in December.

I had no idea Balancers could be daisy-chained like that. Very cool! Surprisingly more expensive than the 8s balancer on eBay though, so that's disappointing.

I just figured these things were done ahead of time. In your opinion: How long should it take to balance the cells (via BMS) in a 100ah 12v pack? (And I'm working blind here because the the LiTime BMS doesn't have bluetooth, so I can't see what's going on.)

Let's set up the situation: A charger is running (could be solar, DC-DC, or shore power) and is outputting 14.something volts (generally 14.2 or 14.4 depending on charger) All batteries are in over-voltage protection mode (because they're sucky grade B cells and no amount of top-balancing will...

I do! I'm using the "Duxtop 9100MC 1800W Portable Induction Cooktop Countertop Burner" with my 3.6kw Outback inverter. In fact, I can use two of these at the same time. It's always worked wonderfully. Unfortunately, I am running a 3.6kw inverter based on a 48-volt battery bank, so it's a...

I'd be quite happy with a victron dc-dc for $50, where do you find those?

It's only spiking right now if the inverter has some kind of draw. Otherwise the system seems to be sitting perfectly happen at 14.-something volts. To clarify, this inverter is very simple and doesn't have a shore power input concept. It's just a 12v DC to 120v AC inverter. There's a...

Agreed, I'm all about the Victron equipment for every application and system these days. The cheap stuff just isn't worth it.

Yes, both connect to the battery bank. Each system (the DC/DC and the MPPT) are both smart enough to not overcharge. If, for example, your MPPT has already charged up your batteries and they're full, the DC/DC just won't do anything. It'll see that the battery is already full.

Anyone have any recommendations for a 16s balancer? I already have a 48v bank in place, and am having a hard time finding something that can do 16s. I really like the 8s model on Amazon where it shows the voltages of each cell, and it's cheap. The fact that Will uses it in his videos seems...

That's a perfect little unit. Thanks!

I've seen this same behavior on a new Li-Time 100ah battery. Got it fully charged (which is another story), then it appeared to go into over-voltage protection mode. At that point, the voltage dropped to 12.8 or 12.9. I finally got it to "wake up" by attaching a 12v socket and plugging in a...

BattleBorns do something that no other company does, as far as I can tell. They capacity match and top-balance their cells before putting them into batteries. This means when you get one of their batteries, it's ready to go. You don't have the over-voltage cutoff issues that myself and others...

I guess I'm just surprised that a charging source would spike so high so quickly. Seeing 19v (even if just for an instant) is really not expected when the charger is supposed to be putting out 14.4 Agreed, in theory, but if your solar charge controller is always running unless you manually...

If charging is all they needed, then I'd agree. The issue I'm having is when a battery hits over-voltage protection at 13.8 volts. Then when an inverter has a large load, pulls some power, then sends it back, the whole systems spikes over-voltage because there's nowhere to put the power, and...

Sorry, no, that wasn't mentioned in the original post. The timing was instantaneous, at least as far as I could tell. Far shorter than 1 second. As soon as we hit the vacuum switch, the battery instantly cut out, throwing the Short Circuit fault code. Richard, I hope you have your...

The only other charger I had handy was only capable of 10 amps. I put that charger on it and it wouldn't go higher than 13.8, no matter how long I left the charger on it. With other lithium batteries, (and all batteries, really), the charge rate would slowly drop as the battery approached full...

I've applied small loads, but have not done a full discharge. I'm not set up with a lot of test or extra equipment, so I don't have an easy way to completely discharge a single 12v battery. Right now I'm in the middle of doing a very slow charge at a controlled voltage to try to get the cells...

Wow, even the SOK's aren't set up with balanced cells to begin with. I have little faith that these Li-Time batteries will ever balance. They also don't have the bluetooth BMS to monitor what's actually going on, so I'm just guessing.

Should I ever need to buy 12v shore power chargers, that one (or the other similar Victron models at slightly higher amperage) are at the top of my list. Meanwhile, for the system that this is intended to go into, I have a Victron 12/3000 inverter, which handles charging already, so I don't...

The 30-amp charger is just a dumb converter that puts out 14.4 volts. The 10-amp charger is a desktop power supply that lets me adjust voltage and amperage.

I read through that post and it appears that I need to cycle the battery many dozens of time before maybe it'll start working correctly. And I need to somehow guess the exact charging voltage and amperage to get the internal BMS to actually balance the one or more high cells. I guess my...

OK, that sounds pretty much like what I'm doing right now with my desktop charger. I can set it to exactly whatever voltage I want and tinker as needed. And I've already been doing the "fun part", trying to figure out how high I can set the voltage without having it trip into over-voltage...

Are there any battery brands (besides Battleborn) that match capacity and pre-balance the cells before they ship out the batteries? I'm looking for a quality battery and Li-Time and SOK appear to not do this. At this point, I'm looking for a simple 12v, 100ah battery, with low-temp protection.

Agreed -- The 48v batteries I've built myself have bluetooth BMS's, and I can check and see what's going on. The 12v batteries I've built lately have bluetooth BMS's. I was trying to just buy something off the shelf and have it work so I didn't have to build my own. That didn't work out so...

Without the bluetooth BMS, I'm guessing at what the voltage is where it'll start balancing. And is that single-cell voltage, or minimum cell voltage? No way to know since it's a sealed black box. So in your opinion -- how long do you think it'll take to balance out one or more cells in a 12v...

Yep, I know. I'm just being impatient with this battery because I was expecting it to be fully functional when I bought it instead of needing babysitting and an extended install process.

I'm pretty sure that was in reference to a Tesla battery. He was having difficulty using the lower-end of the battery because his inverter would shut off before the battery pack hit its lower limit.

I currently have a 48v primary system in my RV, and it's working great. I also have a 48v to 12v converter which supplies me with 12v for things like lights, water pump, etc. I've been adding more 12v stuff, and I have plans to add significantly more, such that I'll be beyond the rated...