Rare earth yttrium battery...Some one pointed out to me, Winston seems to claim charging to -45C. I assume this is a miss print? http://www.evlithium.com/thunder-sky-winston-battery/lifepo4-100ah-b.html
View attachment 15542
Huh?
Rare earth yttrium battery...Some one pointed out to me, Winston seems to claim charging to -45C. I assume this is a miss print? http://www.evlithium.com/thunder-sky-winston-battery/lifepo4-100ah-b.html
View attachment 15542
Winston aka Thundersky adds yrrtrium to their LiFePO4 batteries. Technically theylre LiFeYPO4 batteries. Studies have found it improves performance in all sorts of ways.Rare earth yttrium battery...
Huh?
I'm not saying that. I don't know.So that is not some misprint on the temps, they really can charge down to that low of temp?
You can have an argument with yourself.Somehow I got logged into a different account lol
It is very frustrating to see a recommendation to a product that is not available.Spent the last few days and tonight testing BMS:
1. The "new" daly LiFePO4 BMS (that states in the data sheet that it has low temp charging protection) does not have low temp charging protection. And yes, it has a temp sensor attached. This disappointed me big time. Video to come.
2. Next, I programmed/tested this BMS for a couple of days:
View attachment 4222
And it failed. App would crash. Default low temp cut off was -5 degrees C. No manual and very difficult to work with. Had a lot of issues with it. Will cover every downside in my upcoming video. Avoid this BMS.
3. Then I tested the battery hook up 100A BMS that arrived this afternoon:
View attachment 4223
And low temp cut off was programmable and worked perfectly. Bluetooth connected perfectly as well. I was excited so I did a load test of 200Wh with 90-102A continious. Passed with flying colors, then pushed it passed its limit and it disconnected the loads. Heatsink stayed warm and did not heat up excessively.
I'll make a long video covering all these things and the testing methods, but I am going to go with this bms from now on. I am so tired of other bms failing. The battery hookup one is used on medical devices as well, which I need more information on.
The number one most important thing to know when using this bms is that you need the proper app. The app on the website is NOT what you want. You need the "enterprise" version:
Click Here for APK of enterprise BMS program app
Send it to your phone with an email (not gmail), then install in on your phone, then connect to bms.
Then go to parameter settings and change the low temp charging cut off to 2 degrees Celsius. Then the reconnect voltage to 5 degrees Celsius.
You can buy this bms by clicking here (my affiliate link) and the coupon code is "SOLAR" for 10% off. I am going to get a 8s model and build a big system with it. I like this bms a lot, so will be testing it like crazy. I also will make a DIY video on how to use it in the next couple days (possibly tomorrow if I get enough sleep tonight).
Biggest downside of this bms is 2x 10 gauge wires at P- and B-. But it has a hole and solder tabs for adding more wires.
Just wanted you guys to know about all this before you waste your money on the first 2 bms. I wasted $150 on those bms and they were a total rip off. The new bms seems to kick butt, so videos to come.
It is very frustrating to see a recommendation to a product that is not available.
GOOD NEWS: Overkillsolar.com has it in stockIt is very frustrating to see a recommendation to a product that is not available.
GOOD NEWS: Overkillsolar.com has it in stock
I sent out a request for wholesale pricing. Do you know if it has low temp cutoff?Overkill, do you carry -or- do you plan to carry -or- could you please carry...this version: https://fr.aliexpress.com/item/4000776885236.html
Pics and quote from another thread:
The BMS is compact and feels very robust, encased in metal all the way. Proper copper leads, two external temperature sensors. It supports low and high temp cut-off. Of course, 'manual' is lacking, so just for reference: it won't turn on until you put a charger on it (voltage applied needs to be higher than the battery voltage), the Bluetooth pairing code is '1234' and the pin code to make changes to the BMS values is '123456'.
Screenshot of the app. I just put a quick 16 cell pack together, so ignore things like wire resistances and remaining capacity etc. The voltages are looking good, and the integrated balancing seems to work very well. This is the 100A discharge current with 0.6A balancing current version I got to test and play with. If this thing works properly, I'll get the one with 300A discharge current with 2A balancing current version.
I sent out a request for wholesale pricing. Do you know if it has low temp cutoff?
I'm going to look into it. Their janky website doesn't have the 16s model but it does have a pretty cheap 4s 300a unit that looks really interesting.Apparently, yes it does...
"Proper copper leads, two external temperature sensors. It supports low and high temp cut-off."
Quote is from user: upnorthandpersonal who is currently using this BMS
GOOD NEWS: Overkillsolar.com has it in stock
janky website for sure...but I believe I'm seeing units ranging from 14s to 24s, no? The one upnorthandpersonal (pictured in post #969 above) is currently using is 16s and he says it came from that site.I'm going to look into it. Their janky website doesn't have the 16s model but it does have a pretty cheap 4s 300a unit that looks really interesting.
In fact there is news. I got 30 of them in and tested one while making a video assembly guide. It works fine, just like the 4s unit.Any news on a 8s version?
In fact there is news. I got 30 of them in and tested one while making a video assembly guide. It works fine, just like the 4s unit.
I will put them up for sale soon. Trying to edit the assembly vid to make me look less of a goober.
100a (2400w) although I definitely pulled 150 amps when I wasn’t paying attention? That is news! How many amps are they rated at?
janky website for sure...but I believe I'm seeing units ranging from 14s to 24s, no? The one upnorthandpersonal (pictured in post #969 above) is currently using is 16s and he says it came from that site.
The forum user who has this BMS (upnorthandpersonal) only provided that aliexpress link. Not sure who manufactures it...possibly:Who manufactures this BMS? Could you post a link to the website you are referring to, all I see is the aliexpress link above.
100a (2400w) although I definitely pulled 150 amps when I wasn’t paying attention