Connecting Batteries in Series - Charging 12V Lithium Batteries
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- เผยแพร่เมื่อ 11 มี.ค. 2024
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In this video, I will talk about connecting batteries in series. With a focus on 12V lithium batteries in series, charging 12V batteries in series, and the overall concept of series batteries.
We start with the basics: understanding how connecting batteries in series can increase your system's voltage while keeping capacity the same. Imagine taking two 12V 100Ah batteries and wiring them into a single 24V 100Ah battery.
But what about the power? Does it remain unchanged whether you choose series or parallel wiring? I'll break down the math, showing that the total power remains constant, and how this understanding can guide your system's configuration for maximum efficiency.
The video has practical advice, distilled into three rules for connecting batteries in series to avoid common pitfalls, such as mixing different capacities or chemistries, and the importance of charging your batteries before a series connection.
But there's more to it than just the how-to. I delve into the pros and cons, highlighting the advantages like cost savings on wiring and charge controllers due to increased voltage, reduced voltage drop, and more efficient power distribution. Yet, the story wouldn't be complete without addressing the potential downsides, such as the challenges of battery imbalance and the need for voltage converters for your 12V appliances.
Through diagrams, and wiring examples, from the simple 2S configuration to more complex setups like 4S2P, I explain how to design and optimize your battery system. Whether you're looking to build a 24V or 48V system, this video has you covered, offering insights into balancing, charging, and the critical role of battery management systems (BMS) and lead-acid batteries.
As we explore the intricate dance of connecting batteries in series, my goal is to help decrease the cost of your off-grid solar power system without compromising on performance. From selecting the right batteries and chargers to understanding the nuances of series vs. parallel connections, this video is for anyone looking to enhance their off-grid solar setup. - แนวปฏิบัติและการใช้ชีวิต
I'm ordering a paperback copy. Thank you brother
I appreciate your support! If you have questions feel free to email me.
This is helping me so much. Thank you for making these videos.
Thanks brother
Question, I have 2 - 12V LFP batteries connected in series and will use them to connect to a Pecron solar generator via the solar input to charge it during emergencies. When I drain the batteries, I have a 20 A - 12-24V charger to recharge them. To recharge, do I connect the alligator clips to each batteries terminals to charge them separately while they are still connected in series or do I attach the alligator clips to the load terminals, + on one battery and the - on the other battery? Great videos BTW.
Good Evening ! Just got your book last week. TAKE CARE..
Thanks!
Great video
great video do you have anything on bms size and how to work out whats needed for 24v and 12v /
I don't. However, I will add it to the list of topics to cover in a video. 12V needs a 4S BMS, while 24V needs an 8S if you use LiFePO4. The C-rate of the cell should be more than the rating of the BMS. Example: 4 280Ah cells is series makes a 12.8V battery with a max C-rate of 280A. Use a 12V 100A BMS and you can draw a max of: 12V*100A=1200W from the battery.
Absolutely awsum video, I do have a question/scenario. In a system set up in a solar generator where the batteries stack one on top of the other, wouldn't this make the top battery take more load than the others,and if so,how to get around that,just rotate the batteries bottom to top every so often.I ask because most manufacturers are using this setup. Point Zero Energy(titan) Eco Flow Ultra,and so on,is this the only answer, to rotate and rebalance each battery individually?
They are connected in parallel, not series. Check my video about connecting batteries in parallel.
Thank you for the video. Very helpful. I have a 4s4p 12.8v 51.2V LFP system. These are new batteries. Like you say in your video I am concerned with balancing. A video on setting up a balancer would be useful to me and others who bought 16 batteries! I don't believe my system is optimized and would like to get it better balanced. Would adding bus bars help? The batteries are wired correctly. Thanks in advance for your thoughts.
Check out my video about wiring batteries in parallel as well. For a series connection you can just use the wires, or you have to make custom busbars which might not we worth it. For the parallel connection i would use busbars.
Can u make graph for me 12v 13 batteries 48v witing
If you had 4 x 230 watt panels and 2 x 410 watt panels in a 24v hybrid inverter. What would your advice on wiring them in.? The mppt takes 60v to 500v
Checkout my video about wiring mismatched solar panels. You need to know the vmp and imp of the panels as well.
@@cleversolarpower I have all that information. I'll take a look at your video. The 4 x 230 are old poly panels and they 2 x 410 are modern DAH half cell panels. Much higher Voc on those
@@cleversolarpower DAH 410 vmp 37.5 imp 10.5 and the Trina 230 are vmp 29.5 imp 7.78
@@cleversolarpower I did the 2 Dah panels in parallel. The 4 x Trina panels in series. Then both sets in parallel
The best solution would be to have the four panels go to the MPPT and the two others on a separate MPPT. Now you are losing power.
Can you guide about 36v system and battries in 36v
It's the same setup as these diagrams. For 36V, you need 3 batteries in series.
Hi i have 2 rechargeable lithium 1.t batteries in a device that are connected in series, but the charger for the device is no longer available, it has a barrel connector to charge the batteries, can I use a 4 battery lion as charger connected to the output of one of those outputs to a barrel connector to charge these 2 batteries? Otherwise I have to take the device apart, thanks
I can use nimh batteries but I still need to know how to charge the 2 in series with one single input, thanks
I'm not sure about that. Check the voltage of the charger and the charging voltage of the battery you want to charge.
Excellent 🎉
Top top top!!!
Not wrong, take a second look 😉. 2 batteries in series, in three parallel strings. 2S3P.
How can I buy one of your book?
Yes, it's in the description of the video.
where do i wire it for charging
Same place as the discharging.
can buy pdf files
You are not explaining how to balance manually two batteries that need to be hooked in series.
Check the video again, I say that you have to charge the batteries to the same SOC.
@@cleversolarpower Found a new video that explained it in details. Thanks.
200 year old knowhow like electricity and they think they are experts.