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I ordered my Chargery BMS system from Jason directly on March 5, 2020. It just arrived today, March 13. I would call that record time, wouldnt you? I want to openly commend Jason and Chargery for being one of the most professional companies I have ever had dealings with. He answered every...

Steve_S: when you translate/update the user manual, can you improve/expand the section that deals with the current communication setup with a computer. The manual mentions COM3 can provide RS232 output but says nothing about using this output with a computer. Manual says USB port can be used...

Thank you very much Steve_S for pioneering the Chargery BMS system for us and to all the posters that have contributed. I just order the BMS16T 600 amp version with all its accessories from Jason for a total of $395. I also ordered the Chargery 10325 1500 W / 25 A power supply for $290. I...

Dzl: thanks for the very reasoned response. Its interesting that the West Marine Table you reference pointedly states that its for 12 V systems only. That leads one to think that the same table for 24 V or 48 V systems would be considerably different. So again, voltage matters?

As an electrical novice, wire sizing has been one of the things I have paid a lot of attention to in my internet research. I have not used scientific data sources for this research, but have relied on "apparently reputable" company sources. Can anyone explain these confusing results? Item 1...

Yes to your first question. This was the revelation I learned about a week ago from Darkstar. I totally had no clue such a charge controller existed. I immediately bought one and it works! The T8 can balance cells using a 2 amp current. The most I measured with my CHEAP clampmeter was 1.5...

Would it be an idea to begin a new thread: The best way to do charge and load switching ? This is a very timely topic for me also at this point in my development and I would relish some good discussions and examples on this topic. It might usefully begin with someone organizing the existing...

The ISDT T8 balance charger is the only one that I know of that can be used for automatic top balancing of LFP batteries. You set the HVC and it just grinds away, in my case for 28 hrs, charging up one cell at a time to the HVC level and keeps the cells there. In contrast, my prior charge...

Well I did get a stable 3.5 vpc after power was removed. However, as soon as my load got turned on, the cell voltage dove down to 3.3 - 3.4 in literally minutes. So I conclude that other than top balancing there is not much point to go up to 3.5+ vpc. Would you agree?

I temporarily joined two BYD batteries that I had previously capacity tested individually together in parallel. I paralleled the cells following David Poz’s lead and then paralleled the two main terminal of the batteries together to form a nominal 24v 200 Ah pack. I wired a standard 20 AWG...

Really interesting reading on memory effects of LFP in the Nordkyn articles. I am just starting with my BYD 24 v batteries which appear to have a memory effect in place. I use a MeanWell power supply feeding power into my only two charge controllers: ToolKitRC M8S and ISDT T8. They have very...

That is great news. Thanks for the info on the ISDT T8 charge controller. It is right now top balancing two of my batteries with cells paralleled and the two battery packs paralleled. I cant wait to discharge them and see if I can get better than the 2.7 KwH I got in my previous tests. I am...

I am sorry but I must have totally missed your report of capacity test based on top balancing BYD batteries. Can you point me to your results? I just got the ISDT T8 charge controller that DarkStar turned me on to and am a few hours now away from finished the top balancing. I am very curious...

Great. That clarifies things immensely. Thanks for the diagram.

Thanks so much for this clarification. So a SCC is connected directly to the battery thus bypassing the BMS entirely?

Thanks for all the excellent information on the Chargery BMS. I have watched the vids and read the manual from chargery. Non of this material mentions how a solar charge controller works with the Chargery BMS. How is such a solar charge controller connected to the Chargery BMS? What happens...

Thank you very much for this personal experience. I am concluding that the products from this Chargery company are very impressive.

I formulated my question poorly. Please dont take offense, but in the last 4 months of my learning process I have learned that the devil is in the details. What I should have asked is this: Can you, through personal experience, verify that this Chargery BMS, if set to a low voltage cutoff, say...

With the discharge relays controlled by the Chargery BMS which is fed by a cell balance wire harness are you actually able to disconnect the load from the battery at a specified individual cell voltage or do you need to use a pack total voltage for the disconnect.

Try these balance cables which are 20 AWG, the largest I have been able to find. Amazon asin is B00NBANNMS .

Here is an earlier picture of my test setup. https://diysolarforum.com/threads/cheap-4kwh-lifepo4-batteries-from-battery-hookup.1496/page-16#post-30098

Probably the easiest way to learn how to use the ToolkitRC M8S charge controller is to google it. You will immediately see lots of YouTube videos on how to use this charge controller as well as some reviews. The manual can be downloaded https://www.toolkitrc.com/filedownload/151629 . Be aware...

Sorry to hear that, Picasso. I thought all the vendors were offering rebates or some way to make things right. I assume you have talked to some of their higher ups directly? Maybe by pushing back more you and others will get results. Best wishes.

Thanks so much, DarkStar. That is way cool. Great videos also. I like the different charging method your T8 and Q8 charger uses. The ToolkitRC just stops charging once once the first cell reaches the HVC level. It makes way more sense for a charger to hold the cell that reaches 3.6 v first...

OK. will do. but give me a couple of days. Got to go now.

How did you "balance charge" your 2 BYD's and get all your cells up to 3.6 v without one or more going overvoltage in this knee area? and why are yours staying at VPC of 3.6 when most of the rest of us are reporting an quick drop out of the knee area back down to 3.31 - 3.34 stable VPC as soon...

BatteryHookup.com For capacity testing I am not using a BMS. My ToolkitRC M8S charge controller takes care of HVC. My BattGo cell monitor sounds alert for LVC. I know from experience now that it takes app. 3.5 hours at discharge rate of 30 amp to get close to LVC of 2.8 v on my worst cell...

Summary of charge/discharge cycles of two of my six BYD batteries. I am charging up until the first cell goes over 3.5 v (where I set my charge controller, ToolKit RC M8S, to cut off). My charge rate has been either 5 amp or 8 amp. I discharged until the first cell goes below 2.8 v. My...

Well, I am going to be an advocate here. Like Jason has been saying all along: its not an absolute standard here but a relative one. Yes these are used batteries and yes the sellers should have done better at describing their actual capacity. But face it, its a hard thing to do. It took...

Sorry about the misspelling. This is the Nordkyn article that references the memory effects for LFP. --> memory effects . The reference is to a Japanese research article listed in the reference section. This discussion is about half way down into the article. Let us know what you think.

Just got back from 2 weeks vacation and a lot changed while I was away. David Poz reported 3 KwH capacity in his 8 batteries, others here on this forum came in between 2.7 - 3.5 Kwh capacity, Will Prowse got indignant and talked with Batteryhookup owners and others and got them to change their...

Thank you so much for your gracious reply and invitation to come visit. I am currently on vacation in Ecuador and will return at end of February. In March I will make an appointment with you to come and visit and talk about buying two more of these BYD batteries. Best wishes until then.

Thanks so much for the pointer, GVSolar. I just read that thread and cannot help being totally relieved with the news ... finally! These batteries can provide 2.8 KwH +/- for our use. NOT 4 - 4.5 Kwh as was advertised. I am really glad that Will it coming out strongly against this false...

I bought 4 BYD batteries from batteryhookup in early Nov. I have just been able to run capacity tests on them as I reported on the forum here. With 3 charge/discharge cycles i average about 2.8 KwH on one and 2.6 KwH on the second. This is a far cry from the 4 - 4.5 KwH that was advertised by...

Can you be more specific on the charger? I quickly looked up samlex 24v chargers and landed on ones specifically for Lead Acid batteries not LFP? Thanks.