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BigBattery 48V ETHOS 10.2KWH (2 Module)

BigBattery 48V ETHOS 10.2KWH (2 Module)
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$2,860.00
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$2,860.00
$2,780.00
$2,780.00 - $2,780.00
$2,780.00
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10.24kWh · 51.2V · LiFePO4

BigBattery 48V ETHOS 10.2kWh (2 Module)

This 10.24kWh configuration bundles 2 ETHOS modules — 51.2V, 100Ah/5.12kWh each — into a single stackable bank for whole-home backup or off-grid solar storage.

Every module in the stack ships in the same IP65-sealed, UL9540/UL9540A/UL1973-listed enclosure, and the system communicates over CANBus/RS485 with a compatible inverter through the ETHOS Control Box.

BigBattery 48V ETHOS 10.2kWh (2 Module)
12-Year Warranty*
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Expert Support: (303) 876-7654

Why the ETHOS System

Stackable to 16 Modules Per Control Box

Every ETHOS module is the same 51.2V / 100Ah building block — start with what you need and add modules later without replacing what you already own.

300A Peak Discharge

A 300A peak for 5 seconds covers inverter surge and motor-start loads that a continuous-only rating would trip on.

Wide Operating Temperature Range

Rated to charge from 32°F to 113°F and discharge from -4°F to 140°F, with best performance between 59°F and 95°F.

IP65 / NEMA 4X Sealed Enclosure

Sealed against dust and water intrusion for garage, shed, or outdoor-adjacent installs.

CANBus / RS485 System Communication

Modules talk to the ETHOS Control Box and to each other over CANBus/RS485, the same protocol most hybrid inverters expect for a coordinated battery bank.

UL9540, UL9540A, UL1973 Listed

Certified to the UL standards that matter for a residential energy storage installation, plus UN38.3 for transport.

What's Included

What's included: BigBattery 48V ETHOS 10.2kWh (2 Module)

What You Get

  • 2 × BigBattery ETHOS 48V 5.12kWh Stackable Battery Modules (10.24kWh total)
  • Documentation

Requires an ETHOS Control Box (sold separately) to operate.

Full Specifications

Model BigBattery ETHOS Stackable Module
Nominal Voltage 51.2V
Capacity 200Ah / 10.24kWh (2 × 100Ah/5.12kWh modules)
Battery Chemistry LiFePO4
Cycle Life 3,500–5,000 cycles (80% DoD, 0.5C)
Continuous Discharge / Charge 200A / 10240W
Peak Discharge 300A for 5 seconds
Max Charge Current 200A
Charge Temperature Range 32°F to 113°F (0°C to 45°C)
Discharge Temperature Range -4°F to 140°F (-20°C to 60°C)
Optimal Operating Range 59°F to 95°F (15°C to 35°C)
Weight 546 lb (approx., 2 × 273 lb)
Dimensions 6.7"D; width/height scale with module count (not published per exact count)
Ingress Protection IP65 / NEMA 4X
Communication CANBus / RS485
Max Parallel Up to 16 modules per ETHOS Control Box
Warranty 12 years (per the single-module ETHOS page; not separately re-stated for this configuration)
Certifications UL9540, UL9540A, UL1973, UN38.3

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We sell genuine BigBattery products backed by BigBattery's own warranty.

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Find it cheaper from another authorized dealer? Call (303) 876-7654 before you order.

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Sizing a battery bank or system? Call (303) 876-7654 and talk to a person.

BigBattery 48V ETHOS 10.2kWh (2 Module): Frequently Asked Questions

Can I add more modules to this 10.24kWh system later?
Yes. Every ETHOS module is the same 100Ah/5.12kWh unit, and the system supports up to 16 modules per Control Box, so you can start here and expand in 5.12kWh steps as your needs grow.
What do I need besides the battery modules to build a working system?
An ETHOS Control Box, which is the hub the modules connect to and what talks to your inverter over CANBus/RS485. It's sold separately.
Is this compatible with my inverter?
The ETHOS system communicates over CANBus/RS485, which is the protocol most hybrid inverters designed for stackable LiFePO4 banks expect. Confirm compatibility with your specific inverter model before ordering — call (303) 876-7654 and we can help you check.
How cold can it get before this stops charging?
Charging is rated down to 32°F (0°C); below that, the BMS will not accept a charge, which is normal for LiFePO4 chemistry without a self-heating feature. Discharge is rated down to -4°F (-20°C).
What certifications does the ETHOS system carry?
UL9540, UL9540A, and UL1973 for the energy storage system itself, plus UN38.3 for transport — the certifications that typically matter for a residential installation and permitting.
Do you offer financing or price matching?
Yes. We offer 0% APR financing options through Affirm at checkout, and our Lowest Price Guarantee applies — if you find this product cheaper at another authorized BigBattery dealer, call us at (303) 876-7654 before you order and we'll take care of it.
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