I have the four 12v 100AH on my mobile harbor freight cart, but I went with bus bars to keep the loads balanced. IF you test using a clamp meter, you will find that your method does NOT balance the loads and the issue becomes more acute on AGM systems. One other note to think about is that almost all manufacturers say max of 4 in series or 4 in parallel for a maximum of 16 in the bank. Thanks for posting the video and maybe a follow up video idea showing a heavy load (50+ amps) using bus bar vs NO bus bar. Glad you are feeling better Bob. Gary in cloudy SE Michigan today.
I will run a heavy load before I disconnect that system, as that's a great idea Gary! Mahalo! Pouring rain again atm here...probably 3 inches today alone! That's okay though, it had been a bit dry for out here. Aloha!🤙 (I don't have bus bars yet for tying it up though)🏄🏼
I am glad this system worked out for you. I probably wouldn't have tried it, but now that I know it works I can connect different 100Ah batteries together, I would do it without hesitation.
I always had this in the back of mind to try, and finally did. I think it will be fine. Not a permanent build by any means, but will let it run and see how it does for a bit. Aloha!🤙
Bus Bar all the things! You have wired it as well as you can, in the absence of a proper bus bar configuration, which would mitigate (somewhat) for the concern of connecting so many dissimilar batteries in parallel.
Bob, my friend, it looks like you’re getting back into the swing of things. I’m not sure if I should bring this up again, but I will because I care about you. Please look into ivermectin, vitamin D to help get rid of your melanoma… “ask your doctor about this … this is my disclaimer “…. I’ll leave it at that. Now, onto the subject of the batteries. What you’re doing now is something I’ve done before and works quite well. I have even mixed lead acid with lithium iron phosphate. There’s formulas to work around with this, of course but, in a pinch you’ll find it will also work. I’d like to leave you with a tip that I’ve gotten into and that is, I have my solar panels mounted on my roof and I live off grid full-time. I can’t always check the top of my roof and being the ancient person that I am 67 years old, I don’t always want to climb up and check to see if leaves or anything else has gotten on the solar panels. So my tip is, what I’ve done is., I’ve gotten a small drone.. I’ll send it up to the roof with the camera on doing an inspection of the panels and if need be lower, just enough to blow leaves and any other debris off the solar panels. I hope this helps you and our other breathern out there in the solar world 😂 Aloha brother! 🤙
Mahalo brother for all the info! I am currently exploring several different treatment plans as this stuff is being relentless. Just had another pretty good size surgery a few days ago! I'm being held together with scar tissue! I moved all my solar off the roof now as it's easier for me not to work up there anymore. I used to not worry about that, but I'm not as sure footed as I used to be! Aloha Jimbo!🤙
@ Keep it up brother, your experiments, research, life results and you down to earth way of teaching is much needed to calm the soul in this world today 🤙
Yes keep batteries charged. I have seen several RV's with different LiFePO4 in parralo . Like a Power queen and REDODO 100Ah . As long as voltage is close on them you can parralo them. I charged different AH ones in parralo. Just charging. Worked great .
Just charging here too for the most part. Maybe run a few small loads along the way, but I'll keep an eye on it see if anything weird happens. i wouldn't think so, but easy to see if it does. Aloha!🤙
As long as the battery voltages are close enough, you can connect them together without causing an excessive number of amps to transfer between the batteries. Because they are LiFePO4, their respective SOCs might be vastly different in the beginning (connecting them together will not equalize the state of charge in the batteries)... but after a few charging cycles all the batteries will be in sync. I don't recommend putting more than 4 in parallel without really researching safety. You will start needing more significant fusing (T-class fuses) and the cabling gets more serious. You also have to know precisely how much over-current the various battery brands actually allow, because that can effect the fusing requirements. It is actually better for the system when the batteries do not have much beyond 2x over-current capability when paralleling. When they do, the combined short-circuit current that the battery BMS's allow can easily exceed standard fusing interrupt-ratings. As I'm sure most people realize, scaling a system at 12V starts to get dicey when the amperages required for your loads gets into the hundreds of amps. It is far better to design to a higher system voltage (48V, aka 51.2V LiFePO4) when larger scale is desired in order to keep the amperages and cabling at more reasonable levels. -Matt
Hi Bob, great video ! You eased my mind a little showing this can be done without issue. I have different brand battery’s but same ah etc. I feel more comfortable trying this now. What size wires are you using to parallel the battery’s ? Just curious. Thanks, and have a good one.
Mahalo! I'll run it like this for some time and report back if anything acts up. I used 2awg cables in this configuration. Mostly just wanted to charge these batteries up some, and maybe some small shop loads too. Aloha!🤙
So I have 2 low temp protection batteries a chins and a Siekon both 12.8 v 100 and I also have a 200A Rich solar and a 100A New powa solar panels and I got a 40A Redodo charge controller do yo think that they would pair well thank you and be safe everyone
If you want to store these a charge % around 70 - 80% will be better for the health of the battery. The manufacturer might have some details on this if you want to check.
I Bought 4 24 Volt 100AH Lithium Iron Phosphate of the same name brand and Production Run and charged them all 100% and they read 1 volt differently from each other 27.3 - 27.4 - 28.5 - 27.8 respectively and want to Tie into a 300amp Buss Bar to The rest of My System here. Is a 24 Volt battery balancer needed for this Installation ? And 100amp MRFB Fuse on each Battery Post ?
with how much the price of batteries continue to drop, it makes no sense to buy four 100ah 12v batteries vs just buying one 400ah 12v battery but then again knowing this is a youtube channel, you probably did not buy a single one of them so there's that.
I have the four 12v 100AH on my mobile harbor freight cart, but I went with bus bars to keep the loads balanced. IF you test using a clamp meter, you will find that your method does NOT balance the loads and the issue becomes more acute on AGM systems. One other note to think about is that almost all manufacturers say max of 4 in series or 4 in parallel for a maximum of 16 in the bank. Thanks for posting the video and maybe a follow up video idea showing a heavy load (50+ amps) using bus bar vs NO bus bar. Glad you are feeling better Bob. Gary in cloudy SE Michigan today.
I will run a heavy load before I disconnect that system, as that's a great idea Gary! Mahalo! Pouring rain again atm here...probably 3 inches today alone! That's okay though, it had been a bit dry for out here. Aloha!🤙 (I don't have bus bars yet for tying it up though)🏄🏼
A very interesting project - it looks like you're deploying your resources in a really useful way.
Another day in paradise. Good to see you back in the swing of things and in good cheer. No place like home, eh? Aloha and be well. 🍍
You got that right Dave, no place like home! Mahalo brother!🤙
I am glad this system worked out for you. I probably wouldn't have tried it, but now that I know it works I can connect different 100Ah batteries together, I would do it without hesitation.
I always had this in the back of mind to try, and finally did. I think it will be fine. Not a permanent build by any means, but will let it run and see how it does for a bit. Aloha!🤙
Shouldnt be any poiblem with paralelling . All bms should handle that.
Bus Bar all the things! You have wired it as well as you can, in the absence of a proper bus bar configuration, which would mitigate (somewhat) for the concern of connecting so many dissimilar batteries in parallel.
A few of you and my neighbor have suggested that. I will try to do that in a future follow-up and show the difference. Mahalo!🤙
Bob, my friend, it looks like you’re getting back into the swing of things. I’m not sure if I should bring this up again, but I will because I care about you. Please look into ivermectin, vitamin D to help get rid of your melanoma… “ask your doctor about this … this is my disclaimer “…. I’ll leave it at that. Now, onto the subject of the batteries. What you’re doing now is something I’ve done before and works quite well. I have even mixed lead acid with lithium iron phosphate. There’s formulas to work around with this, of course but, in a pinch you’ll find it will also work. I’d like to leave you with a tip that I’ve gotten into and that is, I have my solar panels mounted on my roof and I live off grid full-time. I can’t always check the top of my roof and being the ancient person that I am 67 years old, I don’t always want to climb up and check to see if leaves or anything else has gotten on the solar panels. So my tip is, what I’ve done is., I’ve gotten a small drone.. I’ll send it up to the roof with the camera on doing an inspection of the panels and if need be lower, just enough to blow leaves and any other debris off the solar panels. I hope this helps you and our other breathern out there in the solar world 😂
Aloha brother! 🤙
Mahalo brother for all the info! I am currently exploring several different treatment plans as this stuff is being relentless. Just had another pretty good size surgery a few days ago! I'm being held together with scar tissue! I moved all my solar off the roof now as it's easier for me not to work up there anymore. I used to not worry about that, but I'm not as sure footed as I used to be! Aloha Jimbo!🤙
@ Keep it up brother, your experiments, research, life results and you down to earth way of teaching is much needed to calm the soul in this world today 🤙
Yes keep batteries charged. I have seen several RV's with different LiFePO4 in parralo . Like a Power queen and REDODO 100Ah . As long as voltage is close on them you can parralo them. I charged different AH ones in parralo. Just charging. Worked great .
Just charging here too for the most part. Maybe run a few small loads along the way, but I'll keep an eye on it see if anything weird happens. i wouldn't think so, but easy to see if it does. Aloha!🤙
Would've been nice to see current sharing on amp meters
im doing the same my batterys go up to 13.9 and for evening drop to 13.3, im buying batterys where ever i can get a deal, have a geat day
Mahalo Lee!🤙
Over abundance of sunshine…have fun stay safe.
Been very sunny lately here! Time for some rain now😉🤙
@@ProjectsinParadise808 Into every life some rain must fall….
Thanks for the cool video Bob. You make some nice cables! What crimper do you use and what guage cable do you use for your 12v systems. Just curious.
Those are actually all pre made cables on the batteries.Aloha!🤙
Aloha Bob! 🤙Nice Experiment!! I was wondering about this exact thing earlier today. Interested to see the long term results
Aloha Gary! I'll let it run awhile and show the logs and see how it behaves.🤙
As long as the battery voltages are close enough, you can connect them together without causing an excessive number of amps to transfer between the batteries. Because they are LiFePO4, their respective SOCs might be vastly different in the beginning (connecting them together will not equalize the state of charge in the batteries)... but after a few charging cycles all the batteries will be in sync.
I don't recommend putting more than 4 in parallel without really researching safety. You will start needing more significant fusing (T-class fuses) and the cabling gets more serious. You also have to know precisely how much over-current the various battery brands actually allow, because that can effect the fusing requirements.
It is actually better for the system when the batteries do not have much beyond 2x over-current capability when paralleling. When they do, the combined short-circuit current that the battery BMS's allow can easily exceed standard fusing interrupt-ratings.
As I'm sure most people realize, scaling a system at 12V starts to get dicey when the amperages required for your loads gets into the hundreds of amps. It is far better to design to a higher system voltage (48V, aka 51.2V LiFePO4) when larger scale is desired in order to keep the amperages and cabling at more reasonable levels.
-Matt
Mahalo for that Matt! I'll let it run like it is for a little while and keep an eye on the logs for anything that looks interesting. Aloha!🤙
Have a great day! And have FUN!
🤙
Good Evening ! Looks interesting. TAKE CARE..
Aloha!🤙
With the different BMS's they might charge at a different rate.
Great video 💯
🤙
Aloha Bob, enjoyed the video. Keep up the good work 👏
Mahalo John!🤙
Hi Bob, great video ! You eased my mind a little showing this can be done without issue. I have different brand battery’s but same ah etc. I feel more comfortable trying this now. What size wires are you using to parallel the battery’s ? Just curious. Thanks, and have a good one.
Mahalo! I'll run it like this for some time and report back if anything acts up. I used 2awg cables in this configuration. Mostly just wanted to charge these batteries up some, and maybe some small shop loads too. Aloha!🤙
It’s better to connect them all to a bus bar that way if one dies it won’t affect the others and you divide the load into more cables.
So I have 2 low temp protection batteries a chins and a Siekon both 12.8 v 100 and I also have a 200A Rich solar and a 100A New powa solar panels and I got a 40A Redodo charge controller do yo think that they would pair well thank you and be safe everyone
If you want to store these a charge % around 70 - 80% will be better for the health of the battery. The manufacturer might have some details on this if you want to check.
I Bought 4 24 Volt 100AH Lithium Iron Phosphate of the same name brand and Production Run and charged them all 100% and they read 1 volt differently from each other 27.3 - 27.4 - 28.5 - 27.8 respectively and want to Tie into a 300amp Buss Bar to The rest of My System here. Is a 24 Volt battery balancer needed for this Installation ?
And 100amp MRFB Fuse on each Battery Post ?
If you're wiring the batteries in parallel then you don't need a balancer. They will balance themselves over time while charging and discharging.
^ This is the way
with how much the price of batteries continue to drop, it makes no sense to buy four 100ah 12v batteries vs just buying one 400ah 12v battery but then again knowing this is a youtube channel, you probably did not buy a single one of them so there's that.