Can this handle charging through the negative output instead of the charging negative pad?

You can't really do this, because you lose the charging protection. Essentially you will be able to charge at whatever the full output is... since you're using the same mosfets. I've tested this personally on this unit, and similarly-priced models from other vendors. It's a shame, because I'm trying to use this with an alternator and I am starting to think BMS is not possible. I will have to get a charge management controller.

It specifies charge voltage of 15v. can i use an 18v dc? will it regulate it for proper charging voltage and current? thanks.

Hello~ You cannot use an 18 v dc, it's higher than 15 v, and may cause damage to the protection. It means that the max charging voltage is 15 v. Hope this could help you, and thank you for your support!

how to wire up the separate port BMS to solar charge controller? Is there diagram?

solar positive and battery positive go together on the battery and solar ground goes to battery charge ground on the bms

Hello, each of my four 12v 12ah lifepo4 batteries already have individual internal bms protection. would adding this unit make any sense? thx

It depends on you, and this protection circuit board helps protecting battery pack from overcharging, over-discharging over-current and short circuit. and it is designed with equilibrium function to keep each cell in balance and good service life.

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12V 100A 4Series BMS Protection Board with Balancing for 18650 Li-ion LiFePO4 Battery Pack

Product ID: 722784456

Details

Battery Cell Composition
Lithium Ion
Brand
Walfront
Item Weight
0.05 Kilograms
Vehicle Service Type
For LiFePO4
Voltage
12 Volts 3.2

⚡100A continuous discharge

💧IP65 waterproof rating

🔋Precision cell balancing

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Description

🔋 Master your power with precision and protection!

SMART CELL HARMONY - Intelligent balancing extends battery lifespan by keeping cells perfectly synced.
PLUG PLAY SIMPLICITY - 5P-250mm harness enables effortless installation for pros and DIYers alike.
WEATHERPROOF DURABILITY - IP65-rated protection ensures reliable operation rain or shine.
COMPREHENSIVE SAFETY NET - Multi-layer safeguards guard against overcharge, overdischarge, overcurrent, and shorts.
POWERHOUSE CURRENT HANDLING - Sustain a robust 100A continuous discharge for high-demand applications.

This 12V 100A 4-series BMS board is engineered for LiFePO4 battery packs, delivering advanced multi-protection features including overcharge, overdischarge, overcurrent, and short circuit safeguards. Its IP65 waterproof design and intelligent cell balancing optimize battery longevity and reliability, while the plug-and-play harness ensures quick installation for solar, EV, and other power-intensive projects.

Specifications

ASIN	B07511RJ9S
Battery Composition	Lithium Ion
Best Sellers Rank	#272,847 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4,341 in Printed Circuit Boards
Brand Name	Walfront
Compatible with Vehicle Type	For LiFePO4 Battery Pack
Country of Origin	USA
Customer Reviews	3.8 3.8 out of 5 stars (149)
Item Weight	0.05 Kilograms
Manufacturer	Walfront
Manufacturer Part Number	Walfrontvth9zscx12
Model	4330198367
Number Of Cells	4
UPC	736691475918
Voltage	12 Volts, 3.2 Volts

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S$61

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.

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