Recent content by HMR

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?