Techniques Paralleling LiFEPO4 Batteries together 

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.

Good tips for balancing batteries together!

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 😋

If you have time you can charge each battery individually great info

Excellent idea about using thin wire as a resistor. That wire could also a pre charge resistor for prior to booting up larger inverters.

great tips Ian.

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

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.

Good work

Cool stuff!

Brilliant!

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?

Thank you for the tip! Can you add a bank of Silicate Batteries into the mix with the LiFEP04's?

thank you

Do you plan to sell the Taico rack style batteries too?

Either discharge the higher voltage battery or charge the lower voltage battery. too easy

😎👍

Do I hear SA accent?

Nope -; cell level LVC, HVC, etc