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BigBattery| 12V RAZORBACK-LiFePO4 (From 138Ah-1.76kWh To 552Ah-7.04kWh)Kits

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Price: $3,699.00 USD
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List Price: $5,164.00 USD
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Price: $3,699.00 USD
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BigBattery 12V RAZORBACK-LiFePO4 From(138Ah-1.76kWh To 552Ah-7.04kWh) Kits

BigBattery"s base level 12V Van/RV RZBK System weighs less than 85(lbs) and the RZBK’s razor thin casing means you can hide this system away wherever you need. Plus, if you upgrade to our 2, 3, or 4 RZBK System, you’ll be saving even more weight and space compared to the lead acid equivalent.

Just one included RZBK Battery Pack is equivalent to (3) 12V Lead-Acid Batteries! This is the world’s thinnest, power-dense pack designed specifically for a small footprint & high-power applications. With this system, you will be able to power virtually anything and everything you wish in (and around) your Van or RV. This unit is compatible with all 12V Solar Panels allowing you to create a truly off-grid solution for boondocking. 

The AIMS Power 2000 Watt Pure Sine Wave ( Model Number: PICOGLF20W12V120V ) Low Frequency Inverter with built-in battery charger and transfer switch is perfect for moderate sized RVs, campsites, tailgating parties, solar systems, and much more. It will also charge your battery seamlessly when connected to shore power.

What"s Included:

Option# 1- 12V RAZORBACK KIT - LiFePO4 - 138Ah - 1.76kWh

1 × 12V RAZORBACK- LiFePO4 - 138Ah - 1.76kWh

1 × Aims 2000 Watt Pure Sine Inverter Charger with Transfer Switch

Option# 2 - 12V 2X RAZORBACK KIT - LiFePO4 - 276Ah - 3.52kWh

 2 × 12V RAZORBACK- LiFePO4 - 138Ah - 1.76kWh

1 × Aims 2000 Watt Pure Sine Inverter Charger with Transfer Switch

1 × Parallel Busbar

1 × 4AWG 3FT BB175 to Ring Terminal Cable

Option# 3 - 12V 4X RAZORBACK KIT - LiFePO4 - 552Ah - 7.04kWh

4 × 12V RAZORBACK- LiFePO4 - 138Ah - 1.76kWh

1 × Aims 2000 Watt Pure Sine Inverter Charger with Transfer Switch

1 × Parallel Busbar

2 × 4AWG 3FT BB175 to Ring Terminal Cable

Designed For 12V Applications

  • RVs
  • Tech Specs

    Single 12V RAZORBACK- LiFePO4 - 138Ah - 1.76kWh Battery Specs

    SKU: ARZBK-12017-G1
    System Voltage: 12V
    Nominal Voltage: 12.8V
    Chemistry: LiFePO4
    Charging Voltage Range: 13.9 - 14.5V
    Max Charge Voltage: 14.7V
    Operating Voltage Range: 9.8 – 14.6V
    kWh Capacity: 1.76kWh
    Ah Capacity: 138Ah
    Cell Configuration: 4S
    Max Continuous Discharge Current: 175A
    Max Continuous Power: 2240W
    Max Discharge Peak Current: 350A (6 Seconds)
    Max Charge Current: 130A
    Charge Temperature Range: -20°C (-4°F) / 65°C (149°F)
    Discharge Temperature Range: -35°C (-31°F) / 65°C (149°F)
    Optimal Discharge Temperature Range: 15°C (59°F) / 35°C (95°F)
    Storage Temperature Range: -5°C (23°F) / 35°C (95°F) (Max 6 Months)
    Weight: 48 lb (21.8 kg)
    Depth: 10.25 in (26 cm)
    Width: 47.25 in (120 cm)
    Height: 1.5 in (3.8 cm)
    Safety Features: Breaker (100A) & Battery Management System
    (Over/Under Voltage, Over Current, &
    Over/Under Temperature Protections)
    Max Connections: Up To (8) Parallel

    Aims 2000 Watt Pure Sine Inverter Charger with Transfer Switch Specs

    Battery Voltage: 12VDC


    Continuous Output Power: 2000W
    Surge Rating: 6000W (20 sec.)
    Output Waveform: Pure Sine Wave
    Output Waveform (Bypass Mode): Same as Input
    Output Frequency (Auto-Detecting): 50/60Hz (±0.3Hz)
    Nominal Efficiency (Peak): >88%
    Line Mode Efficiency: >95%
    Transfer Time: 10ms (Max.)
    Total Harmonic Distortion: <10% DC
    Ambient Operating Temperature: -10ºC (14ºF) - 50ºC (122ºF)


    Nominal Input Voltage: 12VDC
    Minimum Start Voltage: 10VDC
    High Battery Voltage Alarm: 16VDC
    Low Battery Voltage Alarm: 10.5 - 11VDC
    Low Battery Voltage Trip: 10 - 10.5VDC
    Low Battery Voltage Restart: 13.3VDC
    Idle Consumption: 28W
    Idle Consumption (Power Saver Mode): 12.7W


    Output Voltage: Adjustable
    Charge Rate: 70A
    Over Charge Protection Shutdown: 15.7V


    Weight: 41 lbs
    Depth: 16.5 in
    Width: 8.75 in
    Height: 7.1 in


    Specs Sheet

    BigBattery| 12V RAZORBACK- LiFePO4 - 138Ah - 1.76kWh


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    Customer Reviews

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    BigBattery lithium-ion RV battery packs have a track record of being exceptionally reliable while guaranteeing a worry-free experience. Our advanced lithium RV & Van-life solutions reduce generator time and minimize charging periods. We also offer our RV batteries with inverters, so you have a one-stop shop for compatible accessories.

    • 300%


    • 4X 


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    • 100%



    Can your batteries be used in series?

    We no longer offer our batteries for use in series.

    Do your batteries have a thermal management system?

    All of our batteries have a thermal management system that is controlled by the BMS (Battery Management System). This Thermal management system will not only prevent the battery from being used if the temperature is too high, but also if the temperature is also too low.

    Can I use my OEM charger?

    No. Lead acid battery chargers charge at different currents and voltages than our lithium batteries. Using your OEM charger can damage your battery cells and void your battery’s 10 year warranty. We have several chargers optimized for and calibrated to every battery we sell.

    Why does the voltage drop when unplugging the charger?

    The voltage drop that you experienced is called the “bubble voltage” and is perfectly normal for Lithium Batteries. LiFePO4 batteries behave differently than other battery chemistries. The Voltage vs Capacity is not linear. For example, if you have a voltage between (13.3 - 14.6) or (26.6 - 29.2) or (53.6 - 58.4)  you will have more than 99% of the capacity. This essentially means that “Bubble Voltage” contains less than 1% of the entire capacity and the drop when a load is placed is instant.

    Can I leave my batteries outside?

    No. Our batteries are not marine rated or weather proof, so leaving them out under the sun all day or in the rain can damage the batteries. (This type of damage is not covered under the 10 year warranty.

    How many years will my battery last?

    Lithium Iron Phosphate (LifePO4) batteries can be cycled from 3000 to 7000 times. If you cycle the battery daily with an 80% DoD (Depth of Discharge), then you can get even more than 10 years of use from your battery.

    Is BigBattery compatible with all Inverters and Charger Controllers?

    Our batteries work great with almost all inverter/charger controller brands. The only brand we are not compatible with is RENOGY. Please confirm that your inverter can be set to the operating parameters of the battery you’re interested in before purchasing. Parameters can be found as a downloadable PDF spec sheet on every battery product page.

    How do I install my battery?

    All of our batteries come with free ring terminals that can be used to connect your battery to your inverter, cart, or busbar system. We also sell a parallel busbar that can be used in tandem with the included ring terminals to parallel multiple batteries.

    What is the difference between the 12 A and the Upgraded Charger?

    Upgraded Charger:

    • Charging Current: 15A
    • Input Voltage: 110V / 220V
    • Output Voltage: 58.8v
    • Charging Time: 5 h (approx)
    • On-Board Charger: Yes
    • Protection: IP65

    Does Big Battery sell used/surplus batteries?

    In the past Big Battery sold refurbished batteries, such as solar batteries made from recertified Nissan Leaf modules. As of the year 2020, all batteries sold are new, never-previously-cycled batteries that come with a complimentary 10 year warranty.

    How long before my order ships?

    It can take anywhere from a week to no more than two weeks for shipment. This time allows us to assemble, test, and inspect each battery prior to shipping.

    Why does shipment take so long?

    We build every battery upon order, so shipment may take anywhere from a week to no more than two weeks.This is to allow us to assemble, test, and inspect every unit prior to shipment.

    What does your 10 year warranty cover?