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Front view of BigBattery ETHOS 3x Expansion Kit with parallel and communication cables

BigBattery ETHOS 3x Expansion Kit

Brand :

$4,040.00
(You save $1,470.00 )
Calculating Price Per Kilowatt-hours
SKU:
BNDL-B0012
Spec Sheet:
Manual:
Kit Type:
Energy Storage
Kilowatt-hour(s):
15.36kWh

Add More Storage While Keeping the System You Already Love

The BigBattery ETHOS 15.36kWh Expansion Kit is designed for ETHOS owners who need more energy storage without replacing their current system. This expansion package allows you to increase your battery capacity by an additional 15.36kWh while maintaining the same reliable, scalable platform you've already invested in. Complete with the required communication cable, power cable, and rack base, this expansion kit makes it easy to grow your energy storage system as your power needs evolve. Whether you're adding capacity for longer backup times, increasing solar self-consumption, or preparing for future energy demands, the ETHOS Expansion Kit provides a simple path to more stored energy and greater energy independence.

Ethos product advertisement highlighting efficiency and reliability features.

Key Benefits:

    • Extend Backup Runtime: Keep essential appliances, larger loads, and critical systems powered longer during grid outages by increasing your available battery reserve.

    • Designed for Existing ETHOS Owners: The modular ETHOS architecture makes expanding your system straightforward, allowing you to seamlessly increase storage capacity while maintaining a clean, integrated installation.

    • Advanced Protection and Monitoring: Tier 1 LiFePO4 cells, intelligent Battery Management System (BMS) technology, built-in fire suppression, and real-time monitoring help ensure reliable, long-term performance as your system expands.

    • Scalable Up to 80kWh: Continue adding capacity as your energy requirements increase. The ETHOS platform is engineered to support long-term growth and larger residential or off-grid applications.

Use Cases:

Ideal for existing BigBattery ETHOS owners who need additional battery capacity for whole-home backup, increased solar energy storage, growing household energy consumption, EV charging, off-grid expansion, or commercial energy applications.

Tech Specs:

    • Total Additional Energy Storage: 15.36kWh

    • Enclosure Rating: IP65 Weather-Resistant

    • Nominal Voltage: 48V

    • Battery Chemistry: LiFePO4 (Lithium Iron Phosphate)

Please Note: Lifetime Customer Support is based in Texas and available via phone and email. We strongly recommend using a certified solar installer and/or master electrician for professional installation. Please note that additional components may be required for your installation.

Have questions or need assistance? Our support team is here to help! Give us a call at 903-441-2090.

Product Image Product Information
EG4 18KPV Hybrid Inverter | All-In-One Solar Inverter | 18000W PV Input | 12000W Output | 48V 120/240V Split Phase | EG4-18KPV-12LV

3x BigBattery | 48V ETHOS Stackable Battery Module
End Clamp for Mini Rail 30mm close up view

2x BigBattery | ETHOS Parallel Power Cables | 4.9ft | Red and Black
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1x BigBattery | ETHOS Parallel Communication Cable | 4.9ft

1x BigBattery | ETHOS Rack Base

Relevant Videos

Transformable Solar Home Battery System That Will Fit Almost ANYWHERE! BigBattery Ethos 48V

This video provides an in-depth overview and installation walkthrough of the BigBattery ETHOS modular battery storage system, highlighting its slim design, scalability, and outdoor-ready construction. The presenter explains how the 48V, 5.12kWh stackable batteries can be expanded up to 16 modules on a single control unit, making the system ideal for homeowners who want to start small and increase their storage capacity over time. The video also covers mounting considerations, wiring configurations, communication settings, and integration with an EG4 FlexBOSS inverter, while sharing practical installation tips and areas where the product design could be improved. Overall, the review emphasizes the ETHOS system's space-saving footprint, flexible installation options, and ability to deliver scalable energy storage for both indoor and outdoor applications.

Is the BigBattery Ethos LFP Worth It? 1 Year Whole House Battery Experience

In this 1-year update, I dive into my experience with the BigBattery Ethos LiFePO4 whole house battery! This 30kWh battery has flawlessly powered my 1900sqft home for an entire year without a single issue. From seamless integration with the EG4 inverter to its straightforward setup, the Ethos has been a game-changer for my energy needs. This battery is amazing if you're considering solar energy storage or a reliable backup power solution, this review covers performance, reliability, and why the BigBattery Ethos is a top choice for whole-home energy.

Spec Sheet:
Manual:
Kit Type:
Energy Storage
Kilowatt-hour(s):
15.36kWh
10-Year Warranty

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