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FINALLY! I am charging up my first BYD battery. Here is my setup. A MeanWell PSP-600-27 power supply is feeding 29 v at up to 22 amp into the ToolkitRC M8S balancing charge controller. The balance wire harness is self made with #14 wire and machine screwed into the holes of the BYD cell...

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...

Hi All: I am a newbie to the forum. Hats off to you Will for hosting this forum and all your previous good work with your book and YouTube. I just bought 4 of these BYD arriving Monday Nov. 18. Purpose: powerbank to support 16 KwH off-grid solar for small mountain top home in North Carolina...

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...

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...

I am gradually beginning to understand my BYD batteries. A big thank you to all the diysolarforum members for all the information you have provided me and in particular to Jasonhc73 for his practical input and solid understanding. I especially find his recent post at...

Success! After 2 charge discharge cycles producing only 1.2 Kwh discharge capacity, my third charge discharge cycle was more successful. I successfully discharged 3 kwh from my test BYD battery. I was despairing and thought I had a dud. But no more. David Poz reported in a video that his 8...

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...

KBWaldron: thanks for the update. Due to a snafu at batteryhookup my delivery date for 4 modules has been delayed from today Mon. Nov. 18 until Wednesday/Thursday this week. Many apologies from Ryan. Ryan also confirmed that these batteries came from a large solar farm in Arizona where the...

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

Hey Maast: I just came across this old post of yours. The eBay sellers appears to still be selling these. I am going to order 3 more of these to have 4 in total. I love this power supply. Have you actually used this power supply directly to charge a BYD battery? If so, can you relate your...

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...

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...

Thanks KBWaldron. I took a lenth of 1/2 inch inside diameter copper pipe, put it into a vise, used a hacksaw to split the topside, cut to length to fit inside a regular battery terminal and slid both onto the BYD battery terminals. Tightened completely and voila, I got power. I put a 250 amp...

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...

I love Denwa's initial post. In January 2019, I was an absolute novice trying to figure out how to build a portable solar generator to support recharging Lion fans, lights, computers, and all things electronic for my Toyota truck off-grid camping. By the end of March 2019, I had a working...

The user manual of the cheap Chinese solar charge controller I used for a portable solar generator I built last year specifically prohibited using shore power instead of solar power to drive the charge controller. It may be the Victron is a much more sophisticated piece of equipment and has no...

That is pretty much the same story of origin of these batteries that I got from Bryan at BatteryHookup a few weeks ago. So coming from two different sources, perhaps that this the real story. It still does not explain how come these Ghost Batteries are denied by BYD itself and that there has...

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

"BYD has an external control box for the built in BMS so that it can talk to SMA and other inverters/chargers via rs485/CAN. These BYD modules are the first gen version as far as I can tell. MFG date is gonna be around 2013 I would guess. This is for the 2.0 version...

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...

Yeah, I understand. BTW, I really liked your video of your system. Its really impressive. When I get further, I would like to get more information from you about the various components you used. I am in the process of finishing my battery power center in an insulated pump house. Just...

Is your middle name McGiver?

With great embarrassment, I have to announce that my post yesterday (1/22/2020) used inaccurate data and therefore the conclusions based on that data are WRONG! In my first two cycles of my first battery, I used a PZEM--015 shunt meter with a 300 amp shunt. I had no idea the meter that came...

Thanks for the tip. Once the battery is charged up, I will put the IR meter on the separate balancing wires that came with the battery and see if I get a different reading. If yes, I will redo those connectors to the two cells. If not, it confirms that there is something amiss with those two...

After a lot of searching today, I am at a dead end. I talked with a Victron technical support person and he said the Victron equipment communicates with the BYD BMU unit which communications with the BMS installed on each battery module. Picasso provided a link to a BYD BMU, unfortunately it...

Supervstech: glad you are getting 4 units, same as what I am getting. Cant wait to start working on them with you. I found a bit more background history. BYD introduced the B-Box series of 48 v 2.5 KwH batteries in 2017 to replace the 24 v 5.6 Kwh batteries we are buying. See...

OK. thanks for the reassurance. As a complete newbie I am using the step by step process and testing what I think I know as a way to learn. My knowledge has expanded greatly since I got these batteries from learning how to attach terminals to the undersized posts, to decoding the balance...

You are absolutely right. The first cycle of the first BYD battery were taken with the 300 amp shunt and showed a discharge of 1.18 KwH/44.5 Ah. The charging uptake was 919 KwH/36.5 Ah. At this point my anxiety level was really high thinking that my batteries were a complete failure. But I...

Thanks for all the responses for my query. I am so sorry Maast for your accident. A friend of mine just suffered a similar injury and just got done with surgery. No fun at all. Hope you get better soon. Also I understand deeply the desire just to get going and use these things. Nwillits...