How does this compare with a 100Ah LiFePO4 battery?

It holds roughly six times the energy of a 100Ah 12V battery, so one unit can replace a bank of several smaller batteries. That also means one BMS and one set of cables instead of many.

Can it really run an RV air conditioner?

The 250A continuous BMS and 300A peak discharge support high-surge loads, and the maker cites RV ACs as a use case. Runtime depends on the AC's draw and your inverter.

What can the Bluetooth app show?

It reports state of charge, voltage and temperature in real time. That lets you check the bank without a separate shunt monitor.

How long does it take to charge?

At 1C it reaches full in about 12.8 hours. Solar, generator and shore charger inputs all work, and a larger charger array shortens the time.

Can I connect several together?

Yes, up to 4 in series and 4 in parallel (4S4P), which the maker rates to about 131 kWh for whole-home backup. All units should be the same model and age.

What temperature range does it handle?

The maker rates operation from -4°F to 149°F. Check charging limits in freezing conditions before relying on it in winter.

HumsiENK 12V 640Ah LiFePO4 Lithium Battery with Bluetooth & Built-in 250A BMS

Best price now

$949.99at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

HumsiENK 12V 640Ah LiFePO4 Lithium Battery with Bluetooth & Built-in 250A BMS

Best price now

$949.99at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Last seen at $949.99 at Walmart on Nov 11.

Our take on the HumsiENK 12V 640Ah LiFePO4 Lithium Battery with Bluetooth & Built-in 250A BMS

The HumsiENK 12V 640Ah is a large-format LiFePO4 deep-cycle battery rated at about 8,192 Wh, built for RVs, off-grid solar, marine and home backup. Its 250A BMS with 300A peak discharge and Bluetooth monitoring is the standout: you can watch state of charge, voltage and temperature from a phone, and it can run heavy loads like an RV air conditioner. The 15,000-cycle claim at 80% depth of discharge is far beyond lead-acid, and it scales to 4S4P for whole-home banks. It suits buyers who need big capacity in one unit and accept a 109 lb battery that is best installed once and left in place.

Best forFull-time RV and van electrical systemsOff-grid solar and cabin power banksMarine house banksWhole-home backup built from a 4S4P bank

Pros

Very high capacity in a single 12V unit
250A BMS with 300A peak discharge handles big inverter loads
Bluetooth app shows state of charge, voltage and temperature
Rated 15,000 cycles at 80% DOD
Scales to 4S4P for large whole-home banks
Charges by solar, generator or shore charger

Cons

About 109 lbs, so it is a two-person or fixed-install job
Full charge at 1C takes roughly 12.8 hours
Bluetooth monitoring depends on the app working well
Large single-unit capacity means a bigger upfront outlay than smaller 100Ah batteries

HumsiENK 12V 640Ah LiFePO4 Lithium Battery with Bluetooth & Built-in 250A BMS prices at every store

WalmartNew
In stockSold by HumsiENKReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$949.99Free shippingChecked Nov 11
Visit Walmart

About the HumsiENK 12V 640Ah LiFePO4 Lithium Battery with Bluetooth & Built-in 250A BMS

This is a 12V lithium iron phosphate (LiFePO4) battery with 640Ah capacity and 8192Wh of energy. It is used in RVs, solar systems, off-grid setups, home energy storage, marine applications and camping. It is rated for 15,000 cycles at 80% depth of discharge.

A built-in 250A battery management system (BMS) has 6-layer protection and a 300A peak discharge. A Bluetooth app shows state of charge, voltage and temperature in real time.

The battery can be charged from solar, a generator or a charger. It supports 1C fast charging, with a full charge in about 12.8 hours. It operates from -4°F to 149°F. It can be scaled in a 4S4P configuration up to 131kWh for whole-home backup.

Voltage: 12V
Capacity: 640Ah (listed as 600Ah), 8192Wh
Chemistry: LiFePO4 (lithium iron phosphate)
Cycle life: 15,000 cycles at 80% DOD
BMS: Built-in 250A, 6-layer protection, 300A peak discharge
Connectivity: Bluetooth app (SOC, voltage, temperature)
Charging: Solar, generator or charger; 1C fast charging, full in about 12.8 hours
Operating temp: -4°F to 149°F
Weight: 109.02 lbs
Expansion: 4S4P, up to 131kWh
Color: Black
Uses: RV, solar, off-grid, home energy storage, marine, camping

Specifications

color: BlackSource

Questions and answers

How does this compare with a 100Ah LiFePO4 battery?: It holds roughly six times the energy of a 100Ah 12V battery, so one unit can replace a bank of several smaller batteries. That also means one BMS and one set of cables instead of many.
Can it really run an RV air conditioner?: The 250A continuous BMS and 300A peak discharge support high-surge loads, and the maker cites RV ACs as a use case. Runtime depends on the AC's draw and your inverter.
What can the Bluetooth app show?: It reports state of charge, voltage and temperature in real time. That lets you check the bank without a separate shunt monitor.
How long does it take to charge?: At 1C it reaches full in about 12.8 hours. Solar, generator and shore charger inputs all work, and a larger charger array shortens the time.
Can I connect several together?: Yes, up to 4 in series and 4 in parallel (4S4P), which the maker rates to about 131 kWh for whole-home backup. All units should be the same model and age.
What temperature range does it handle?: The maker rates operation from -4°F to 149°F. Check charging limits in freezing conditions before relying on it in winter.
Where is the HumsiENK 12V 640Ah LiFePO4 Lithium Battery with Bluetooth & Built-in 250A BMS cheapest?: At Walmart, for $949.99, as of our latest check.
What do buyers say about the HumsiENK 12V 640Ah LiFePO4 Lithium Battery with Bluetooth & Built-in 250A BMS?: Rated 4.2 out of 5 from 5 ratings.