₦airaland Forum

tetralogyfallot:
7s50p lithium ion built battery
Voltage: 25.9v
Capacity: 160Ah
Energy: 4kWh
BMS used: 80A
Active balancer: 1A
Pieces of cells used: 350pcs of 3.2A 18650 cells

dollarnaira:
No cells ke

BigDickProblems:
😂😂😂😂
Seems he was sleeping when typing it. He must have had a rough day.

tetralogyfallot:
7s50p lithium ion built battery
Voltage: 25.9v
Capacity: 160Ah
Energy: 4kWh
BMS used: 80A
Active balancer: 1A
Pieces of cells used: 350pcs of 3.2A 18650 cells

ajabani4allah:
My Oga, how much is this going for?

tetralogyfallot:
7s50p lithium ion built battery
Voltage: 25.9v
Capacity: 160Ah
Energy: 4kWh
BMS used: 80A
Active balancer: 1A
Pieces of cells used: 350pcs of 3.2A 18650 cells

9ijaprince:
I just finished building a 7S 20P battery bank using 2.5Ah 18650 cells (140 cells total), giving me a 50Ah capacity. I’m using a 50A JBD BMS for it.

My plan is to replicate this setup four times to build a ~4.8kWh battery bank, which will be connected to a 3.5KVA 24V hybrid inverter. It’s a gift to a relative, who runs a frozen food shop.

I really hope it’ll be worth the effort. I have access to over 20,000 18650 cells extracted from EV cars, scooters etc.

tetralogyfallot:
7s50p lithium ion built battery
Voltage: 25.9v
Capacity: 160Ah
Energy: 4kWh
BMS used: 80A
Active balancer: 1A
Pieces of cells used: 350pcs of 3.2A 18650 cells

Elizkid:
I’m getting a Cworth 12v 100ah lifep04 battery on Friday for 190k to power a few 100w or thereabout load during instances when there’s no light.

Is it advisable or is there a ready-made DIY alternative for maybe higher but around the same price.

9ijaprince:
I just finished building a 7S 20P battery bank using 2.5Ah 18650 cells (140 cells total), giving me a 50Ah capacity. I’m using a 50A JBD BMS for it.

My plan is to replicate this setup four times to build a ~4.8kWh battery bank, which will be connected to a 3.5KVA 24V hybrid inverter. It’s a gift to a relative, who runs a frozen food shop.

I really hope it’ll be worth the effort. I have access to over 20,000 18650 cells extracted from EV cars, scooters etc.

9ijaprince:
I just finished building a 7S 20P battery bank using 2.5Ah 18650 cells (140 cells total), giving me a 50Ah capacity. I’m using a 50A JBD BMS for it.

My plan is to replicate this setup four times to build a ~4.8kWh battery bank, which will be connected to a 3.5KVA 24V hybrid inverter. It’s a gift to a relative, who runs a frozen food shop.

I really hope it’ll be worth the effort. I have access to over 20,000 18650 cells extracted from EV cars, scooters etc.

saint2ace:
Go ahead, for the price very few brands can beat it. Just make sure it's for the proposed wattage range. Cheers

saint2ace:
Go ahead, for the price very few brands can beat it. Just make sure it's for the proposed wattage range. Cheers

Elizkid:
Please


Can this charger charge the battery when there’s light

Or can the 20a from an inbuilt sachet inverter work?

Trippledots:
I have this charger. It served for some years until something burnt inside and the voltage doesn't regulate anymore. But it still works, so I use it while manually monitoring the voltage output for emergency cases.

It's the only charger still working out of the few types I got.

Elizkid:
What type of battery did you use it to charge?

Lifepo4?

Trippledots:
No o. Lead acid. I have a feeling you can use it with a pwm controller suitable for LFP to charge sha.

Elizkid:
Please


Can this charger charge the battery when there’s light

Or can the 20a from an inbuilt sachet inverter work?

dollarnaira:
Can work for Lifepo4 and Lead acid.
Not for lithium ion
Not for lithium ion
Not for lithium ion

dollarnaira:
Can work for Lifepo4 and Lead acid.
Not for lithium ion
Not for lithium ion
Not for lithium ion

Obnoxious2001:
It can work for lithium ion, but you will need a good BMS.



Aside from that you can reconstruct it to supply 12.6v for lithium ion charging

Elizkid:
I’m buying a 100ah 12v lifepo4 battery

You mean this charger will charge it without issues?

Obnoxious2001:
It can work for lithium ion, but you will need a good BMS.



Aside from that you can reconstruct it to supply 12.6v for lithium ion charging

Trippledots:
A silent observer here.

I just want to ask a general question.

Is there still any motivation to build 18650packs when it seems the price is already been rivaled by new LFP, factory made packs?

Tetralogyfallot...how much are your cells going for? To help give context to my question.

Lfp are becoming cheap and it makes no sense anymore building huge packs of 18650, when at the end of the day new unused lfp is cheaper, except you are building small projects then I recommend 18650

iraybuju:
If the bms fail you, OTILor oh… how are you sure the bms will stop it from charging when it’s full, you have to monitor it to confirm first

Elizkid:
You mean I’ll plug this charger to an ac outlet, connect it to a pwm controller, and then connect the controller output to the battery?

I’ve never heard of that before