Techniques Paralleling LiFEPO4 Batteries together
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- čas přidán 27. 09. 2022
- This technique can be used for all battery banks, 12V etc, same principle.
We got a lot of technical calls when connecting batteries up in parallel, alarming , BMS tripping etc, here we show a 1st world and 3rd world techniques to get the job done
A light bulb is way better than a skinny cable to use as a hack resistor, with a happy bonus of being able to tell how much current is flowing.
I now have 4 Felicity 10kWh, 1 Cloudenergy 7.68 kWh, 1 self made 11kWh and 1 self made 14 kWh all connected together and perfectly balanced at 100% charge with all 112 cells sitting at 3.34/3.35v
Thanks for the video. Really like thinking out of the box and being prepared.
I posted a pic of my electric heat kits on the diy forum last week that I use for discharging my batteries instead of wearing out an inverter and various loads. I use them like you, as a big high wattage resistor.
great tips Ian.
I've never been able to justify buying one of those power supplies... I probably should just get one while you still can... I've always figured out some other way to do it. I'm Off-grid, My "2nd world" hack for putting a new 24 volt battery into my system is to use one of my old trace c40 charge controllers (12, 24, or 48V compatible) to trickle charge the new (DIY built or prepackaged purchased) battery to 100% SOC... I have had to do both in the last couple months and will have to do it again when I build my new 48 volt system... I hook the charge controller up to my smallest 500Watt Array Vmp- 72VDC and let it sit for a couple days. When the new battery is fully charged I wait for a sunny day when my system is at 100% SOC, or run the generator to get it there. This is where it gets kind of complicated for me because I have a Electrodacus monitoring one of my older batteries and figuring out the state of charge of the whole system... So I reprogram the SBMS120 to the new Ah capacity shut everything down then install the new battery.... Restart the system and then re-program the inverter and charge controllers kind of a pain but I've gotten pretty good at it 😋
Good tips for balancing batteries together!
Excellent idea about using thin wire as a resistor. That wire could also a pre charge resistor for prior to booting up larger inverters.
Cool stuff!
If you have time you can charge each battery individually great info
Brilliant!
Good work
Should I buy that meter when we connect the 2 batteries or dud you already do that? Thank you again. So grateful and excited to test this system out to power 2 fridges and half freezer when power goes out.
thank you
Hi i recently aquired a kit of 5 V5 pytes batteries. I wanted to add these to my current 48100R pytes battery bank of 600ah. (around 30Kwh). Unfortunately i was told i cannot parallel them because they are different model. Can you tell me how can i make them work together? many thanks
Thank you for the tip! Can you add a bank of Silicate Batteries into the mix with the LiFEP04's?
Yes you can! Absolutely, Silicates are the least fussy battery , they can parallel with Lithium's just fine, they are also able to supply hundreds of amps surge when the Lithium's freak out
Thank you for the infos, what about if the batteries have the same voltages but different SOC? If I connect the a new battery to the stack directly to charge, not discharge, it is ok?
If the voltage is close or the same, you should be right to connect.
Do you plan to sell the Taico rack style batteries too?
Perhaps.. When they get to where we want them. So Far.. battery mnfrs make the same drabby interface
😎👍
Nope -; cell level LVC, HVC, etc
Do I hear SA accent?
Either discharge the higher voltage battery or charge the lower voltage battery. too easy