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Ok. Bought one for $277.95, arriving Nov 24-27.

Yes. What's a good way to control the exact temperature applied to the sensor from my dry ice? I don't want to put the dry ice's full (lack of) temperature on the probe, just incremental amounts either way. I don't quite know how to do that. I would need my own sensor to know what the other...

I was trying to delete those posts, but there's no delete button.

I think it's obvious heaters need to be designed into these things along with the BMS and cells. It would do as you say: divert charging current to a pad, not charging the battery until it is to spec temp (let's say over 35ºF), and then ramp it up properly according to the spec sheet and state...

Those two bullet points are compatible with each other. Just saying.

The one I received stopped charging when I put the temperature sensor in dry ice, but it still allowed discharge. I posted here about it...

Can I see that video? I would like to know the genesis of this thread, since I don't understand the discussion without the context. I cannot view the video. I posted another thread about something that might be similar...

I don't have am amp meter. Could it be that it was still charging a little, or not at all? What kind of hall effect sensor works on circuits like this? Does Ideal sell one or something?

New discharge test with capacitors unplugged: 13.2 volts in use room temp. 12.7 volts in use when temp sensor is placed in dry ice. Devices still running fine. Returns back to 13.2 volts when temp sensor removed from dry ice. Devices never shut down.

Update: I turned off the power supply, and only had a fan and a few USB devices running off the battery. This is a discharge test. It showed 13.2 volts. I put the temp sensor in the dry ice. It dropped to 12.7 volts. The devices (fan, USB devices) all continued running. I took the temp...

Test results video at end of post with description. Regarding Will Prowse's review of these nice batteries: Then Will commented on that video with this update: "Correction to this video: Unfortunately, I was correct about questioning the low temp charging protection on the powerblock...

Yes, I'm bored. Yes, I want to experiment. Yes, I might want to start some supply businesses. Yes, I care about being safe. Yes, I'd like to be legally compliant even in over-regulated areas. But first, I want to get some inexpensive land somewhere where there are no or few regulations so...

They don't look PT.

They're shipping again according to them: I got this message from them in Ebay: " New message from: elec-module58 (13,522) Hi sir, I'm sorry to disturb you. Because the product was out of stock, we cancelled your order to protect your interests, but now this items have arrived and...

Uhoh. I didn't know this, but it makes sense: https://www.orionbms.com/general/using-parallel-strings/

Under charge temp: Disconnect from charger, but do not disconnect from heater. Under state of charge or under volts: Disconnect from heater and load, but do not disconnect from charger. Under discharge temp: Disconnect from charger and heater and load. Over state of charge or over voltage...

I'm starting to think a dedicated low temp relay would work, as well as use that relay to be the cutoff instead of the MOSFETs in a lot of these streetlight BMSs.

Voltage isn't the only necessary electrical measurement necessary for battery health; one also needs measurement that can get things like coulombs (with a coulomb count to know how full) and amps, as well as environmental (tempature, and I don't know if anything else is important). Is that done...

I called them and they are very nice. They have a fully UL listed fully sealed aluminum case battery pack that has 7,650Wh for $6,499 each that went through all the UL tests. These are their cells, and their cells are high quality, with some really great safety features (see their website if...

That's $1,888 per kWh on that 960Wh battery without an inverter/charger and electric source gateway, which you saw a few years ago before the stock-market runup and continued anti-individual-storage pressures (so maybe they put in a price increase) I also saw another Lithionics reseller a few...

I started reading https://marinehowto.com/lifepo4-batteries-on-boats/ when I found out about companies I've never heard of. One of the first I found was Lithionics (https://lithionicsbattery.com/), and everything on their web site says they make a great product with all of the obvious features...

Just chiming in to say I want to build a similar BMS setup as yours. I got 32 cells and want two 16S packs each with their own BMS. The reason I want this is so that every cell has its own balance leads and there is no possibility of a cell going rogue by itself with its companion cell helping...

Sgt Raven & nebster, thank you. I have been moderately researching this issue, and what you both said seems to make sense and I had suspected both those things, but wasn't sure. Now I have to find a good charger. I'm trying to decide between Victron and Sigineer unless I'm overlooking something.

Does anyone have the charge curve? I just want to know between 70% and 30%; no need to go 100% to 0%! I wish Will did data dumps of his cell tests. I also bought 32 of the Fortune 100Ah cells. I love them too because they're my first cell pouch LiFePO4 batteries and they seem to be nicely...

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This is my understanding after watching one very educational video which I already linked above and so therefore I'm just being redundant: Not for LiFePO4. If charging under the chemical charging minimum temperature for LiFePO4, every bit of charging voltage you do under that temperature will...

Great comments. I would say three things: You don't know what state of charge the battery will be at ever in the future in a daily cycle battery based upon weather and home users. In a daily cycle home use battery based on solar, you know neither the bottom nor the top amount of charge. I...

I gave a reference to this hour long presentation in my edit. As far as I know, I consider it mandatory for any LiFePO4 BMS maker. The review starts at 1:37:05, and the whole hour long presentation starts at 34:22.

Scary. I prefer balancing at any state of charge. Reasons: I don't want to charge my batteries all the way, because they will have lower life sitting at higher state of charge. I don't have a choice. I.e., whatever I harvest from the farms or buy from the other farms is what I get. (Solar...

Sounds good, but remember to compare it to other motors, because the clamp-on's have a response time that may be longer than the startup surge. Then each motor it compares to should have its own startup surge rating on the sticker. I forgot how to read those.

Wait ... the idea is to have the highest voltage practical going long distances; the fact the well pump is 240VAC is more perfect. Whatever good pure sine wave inverter he can get that can handle the pump starting load (maybe with an added SoftStart on the pump) would be great. He wants a...

Thank you for the education! Those were perfect responses to understand quite a bit more of that and maybe spec out something then program it.

https://www.i2c-bus.org/smbus/ Looks like that's for computer motherboards. https://www.i2c-bus.org/pmbus/ I'm not seeing any solar inverter manufacturers adopting PMBus, so that seems like a dead end. More computer motherboards. Strange. I wonder why BMSs support it then.

Ok, so maybe getting off-topic here since I'm looking at other BMSs, but I noticed that there's another bus called SMBus and I2C. What is that? Also, what about I2C bus? Does that work with inverters? I started another thread for this question...

What's the difference between CANBUS, SMBUS, and I2C, especially as related to BMS and Inverter systems? I noticed that there's another protocol on this page called SMBus. What is that? Also, what about I2C bus? Does that work with inverters? If the protocols are simple enough, I don't mind...