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Ampere Time 12V 400Ah, 5120Wh Lithium LiFePO4 Battery [Extra $100 OFF Code: OFF100]

$1,899.99 $1,769.99SAVE 7%

Free shipping, tax (vary by region) and discount codes calculated at checkout


  • Twice Larger Capacity & Higher Supporting Power: Ampere Time 12V 400Ah LiFePO4 battery with built-in 250A BMS provides max 5.12kWh energy, and supports max 250A continuous charge & discharge current and max 3.2kW continuous load power. 1*Ampere Time 12V 400Ah battery capacity is twice larger than regular 200Ah battery and you could build your battery system with easier operation and no worry about batteries connection. It meets your higher power and longer battery runtime at one time.
  • Automotive Grade Lithium Battery: We adopt Automotive Grade LiFePO4 Cells with higher energy density, more stable performance & greater power, and insist on providing customer with environmentally friendly green power solution. All Ampere Time battery meets UL Testing, CE, FCC, ROHS, PSE, IP65 certifications. Highest grade of battery cell and authoritative accreditation enable Ampere Time battery growing as LiFePO4 battery leader.
  • 100% Protection: Ampere Time LiFePO4 battery set you free from battery security issue. It equipped with battery management system (BMS), which protects the battery pack from over charging & discharging, over current, short circuit, and over temp. It is perfect in many off-grid applications, like solar or energy storage system, backup power, RV, security or surveillance systems and more capability of Ampere Time lithium iron phosphate battery is under exploration.
  • Longer Lifetime & 1/3 Lighter Weight: Ampere Time LiFePO4 battery provides 4000+ cycles with 10-year lifetime, which is twice times to LiFePO4 battery in market with 2000+ cycles and more than 10 times lifetime of lead-acid battery. Further, Our LiFePO4 battery weighs only 39.12kg / 86.2lbs for one module, only 1/3* the weight of lead acid batteries, more portable and easier in outdoor application.
  • Worry-Free Guarantee & Faster Delivery Time: Ampere Time provides 5-year warranty for all battery models with responsive and satisfying customer service. A proper solution will be provided to any problem within 24hrs for delivery, battery usage and problem during using and any other questions. The batteries will be shipped from our warehouse in Los Angeles, CA or Dallas, TX according to the inventory and order address to shorten the delivery time.


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12 Days Maximum Runtime
Keep You Away From the Power Outage

“Ampere Time 12V 400Ah LiFePO4 battery provides you 5.12kWh energy supply,
last 12 days to keep you away from the power outage(ensure a daily electricity demand of 0.4kWh)."

Larger Capacity, Supply for All Major Appliance

Higher Supporting Power Meets Your More Colorful Life

1/2 Space Saving & Easy to Use

One 12V 400Ah(5.12kWh) LiFePO4 battery=4Pcs 12V 100Ah LiFePO4 batteries in 4P (Or 8 Pcs 12V 100Ah AGM batteries in 8P)

Up to 81.92kWh Energy Expansion
Power you from the U.S to France

Ampere Time 12V 400Ah Lithium batteries support up to Max 4S4P connections to get more energy up to 81.92kWh.

S:Series; P: Parallel
Different scenarios require different battery systems, please consult the Ampere Time service team(service@amperetime.com) for a customized system solution.

12V 400Ah LiFePO4 Battery For Solar Home System

Automotive Grade Battery Cells Proven & Precise BMS Board

BMS-Protection for Overcharge, over-discharge, over current, short circuit, High temperature>70℃

100% safety Protection

Recycle & Environmentally friendly

High Energy Density: 131Wh/kg, 60Wh/lb, 10% higher than 4×12V 100Ah LiFePO4 Batteries in parallel(116Wh/kg, 53Wh/lb).

*NOTE: Do not charge below 0℃; Do not use it as a start battery (such as trolling motor and golf cart),please contact service@amperetime.com for a better solution.

3 Recommend Charging Ways

A variety of charging modes, let you easily enjoy green energy

Born for Long-term Electricity Supply

What's Inside the Box?

12 Days Maximum Runtime
Keep You Away From the Power Outage

“Ampere Time 12V 400Ah LiFePO4 battery provides you 5.12kWh energy supply,
last 12 days to keep you away from the power outage(ensure a daily electricity demand of 0.4kWh)."

Larger Capacity, Supply for All Major Appliance

Higher Supporting Power Meets Your More Colorful Life

1/2 Space Saving & Easy to Use

One 12V 400Ah(5.12kWh) LiFePO4 battery=4Pcs 12V 100Ah LiFePO4 batteries in 4P (Or 8 Pcs 12V 100Ah AGM batteries in 8P)

Up to 81.92kWh Energy Expansion
Power you from the U.S to France

Ampere Time 12V 400Ah Lithium batteries support up to Max 4S4P connections to get more energy up to 81.92kWh.

S:Series; P: Parallel
Different scenarios require different battery systems, please consult the Ampere Time service team(service@amperetime.com) for a customized system solution.

12V 400Ah LiFePO4 Battery For Solar Home System

Automotive Grade Battery Cells Proven & Precise BMS Board

BMS-Protection for Overcharge, over-discharge, over current, short circuit, High temperature>70℃

100% safety Protection

Recycle & Environmentally friendly

High Energy Density: 131Wh/kg, 60Wh/lb, 10% higher than 4×12V 100Ah LiFePO4 Batteries in parallel(116Wh/kg, 53Wh/lb).

*NOTE: Do not charge below 0℃; Do not use it as a start battery (such as trolling motor and golf cart),please contact service@amperetime.com for a better solution.

3 Recommend Charging Ways

A variety of charging modes, let you easily enjoy green energy

Born for Long-term Electricity Supply

What's Inside the Box?

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January,February,March,April,May,June,July,August,September,October,November,December
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Ampere Time 12V 400Ah, 5120Wh Lithium LiFePO4 Battery [Extra $100 OFF Code: OFF100]

$1,899.99 $1,769.99