Add to cart
SunGoldPower Powerwall X 51.2V 200AH Lithium Battery SunGoldPower Powerwall X 51.2V 200AH Lithium Battery $1,974.95
BigBattery 48V ETHOS 15.3KWH (3 Module) BigBattery 48V ETHOS 15.3KWH (3 Module) $5,089.95
bigbattery|SKU:BNDL-B0003

BigBattery 48V ETHOS 10.24kWh LiFePO4 Battery Bank

10.24kWh of Field-Tested LiFePO4 Storage

10.24kWh LiFePO4 Storage — Tier 1 cells built for long-cycle life
Expandable to 80kWh — Stack modules under one control box
IP65-Rated Protection — Built to survive dust and water exposure
Built-In Fire Suppression — Integrated safety module for peace of mind
  • FREE System Design Consultation -- Our engineers size your system for your actual consumption
  • FREE Shipping -- LTL freight included, no surprise charges
  • Compatibility Guarantee -- Components pre-vetted to work together

$2,442.95

0 in stock

Add to Cart
BigBattery 48V ETHOS 10.2KWH (2 Module)
BigBattery 48V ETHOS 10.2KWH (2 Module)
$2,442.95

30-day money back · No restocking fee

🔒 100% Secure Checkout

Visa Mastercard American Express Apple Pay Google Pay Klarna Link by Stripe
Free Returns 30-day hassle-free returns.
Free Delivery Every order, every time.
Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • 1× ETHOS Control Box
  • 2× 48V ETHOS 5.12kWh Stackable Battery Module
  • 1× 10kWh Ethos Controller to Battery Power Cable 31.5 inch
BigBattery 48V ETHOS 10.2KWH (2 Module)
BigBattery 48V ETHOS 10.24kWh LiFePO4 Battery Bank
$2,442.95

10.24kWh of Field-Tested LiFePO4 Storage

The BigBattery 48V ETHOS 10.24kWh system delivers two 5.12kWh stackable modules and a dedicated control box, built for off-grid and grid-tied setups that demand real reliability. Tier 1 LiFePO4 cells, a built-in fire-extinguishing module, and an IP65 weatherproof casing make this system built-to-survive in remote cabins, homesteads, and commercial sites. Scalable up to 80kWh per control box, it grows with your energy needs. Ships free with a 30-day performance guarantee.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
Tier 1 LiFePO4 Cells
Scalable to 80kWh
IP65 Weatherproof
UL-Certified Connectors
10.24kWh
Total Capacity
200A
Max Continuous Discharge
48V
System Voltage
No More Guesswork With Your Battery Bank

No More Guesswork With Your Battery Bank

You have watched enough videos about mismatched inverters and dead batteries to know the risk. The ETHOS 10.24kWh system eliminates that problem. Every module in this bundle connects through a single control box with UL-certified connectors and a unified BMS that communicates voltage, current, and temperature in real time. Off Grid Vault pre-vets this architecture so the battery bank actually talks to your inverter. No mix-and-match guesswork, no incompatible voltage ranges, no surprises three months after installation. This is the battery bank that works with your system, not against it.

Scale Your Storage Without Starting Over

Scale Your Storage Without Starting Over

Start with 10.24kWh today and expand up to 80kWh per control box as your energy needs grow. Each 5.12kWh module stacks cleanly, so adding capacity does not require rewiring your entire system or buying a second control box. That matters when your cabin grows from weekend use to full-time residence, or when your homestead adds a well pump and workshop. The 48V architecture keeps your cable runs manageable and your continuous discharge headroom at 200A, enough to support substantial loads without voltage sag under real-world demand.

Engineered for the Conditions That Kill Batteries

Engineered for the Conditions That Kill Batteries

LiFePO4 chemistry handles heat, cold, and deep discharge cycles far better than standard lithium-ion. The IP65-rated enclosure seals out dust and water ingress, while the integrated fire-extinguishing module adds a layer of protection most battery banks skip entirely. Your low voltage cutoff sits between 48V and 50.8V, keeping cells within a safe state of charge range even during extended cloudy stretches. This is off-grid proven storage designed for the unconditioned spaces where real systems live — garages, sheds, and utility rooms without climate control.

Compatibility Check

Verify these conditions before adding to your system.

  • 48V inverter or charge controller with 48–57V operating range
  • Wall or surface rated for stacked module weight
  • Electrical panel supports 200A continuous discharge

Where This Battery Belongs

Designed for installations that need serious, expandable energy storage.

Off-Grid Cabins & Homesteads
Solar Energy Storage
Commercial Backup Power
Grid-Tied Residences

Full specifications

At a glance

Dimensions
See product page
Power
48V
Warranty
See product page
Full specifications16 data points across 4 categories

Dimensions

DimensionsSee product page

Power & Performance

System Voltage48V
Nominal Voltage51.2V
kWh Capacity10.24kWh
Ah Capacity200Ah
Charging Voltage Range55.6 - 57V
Max Charge Voltage57V
Operating Voltage Range48 – 57V
Suggested Low Voltage Cutoff48 – 50.8V
Cell Configuration16S 2P
Max Continuous Discharge Current200A
Max Continuous Power10

Materials

ChemistryLiFePO4
Casing RatingIP65

Compliance & Warranty

ConnectorsUL-certified
WarrantySee product page

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance and backed by people who understand off-grid power.

Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Free ShippingShips free on all orders, including LTL freight on large systems. No minimums, no surprise charges.
★★★★★
“Running two of these modules on my 48V Sol-Ark system for eight months now. Zero issues through a Montana winter. The BMS gives me real-time cell-level data, and the stackable design means I can add another module when I build my workshop next spring. This is the battery bank I wish I had bought first.”
D
Derek L.Bozeman, MT

Welcome to the forefront of energy storage innovation with the BigBattery 48V ETHOS systems. These 5.12kWh battery modules (10.2kWh – 2 module) form the backbone of adaptable power solutions suitable for a wide range of applications, including grid-tied residences, solar installations, remote off-grid locations, and commercial establishments across the country. Featuring Tier 1 LiFePO4 cells, renowned for their safety and durability, and offering scalability up to 80kWh per Control Box, the ETHOS system sets a new standard for dependable energy storage solutions.

  • Scalable Power:¬†5.12kWh modules, expandable up to 80kWh per ETHOS Control Box.
  • Safety First:¬†Tier 1 LiFePO4 cells and built-in fire-extinguishing modules ensure maximum safety.
  • Smart Monitoring:¬†Advanced BMS technology provides real-time monitoring of voltage, current, and temperature.
  • Reliable Connectivity:¬†UL-certified connectors ensure secure and reliable power connections.
  • Durable Design:¬†IP65-rated casing protects against the elements for long-lasting reliability.
  • Versatile Applications:¬†Ideal for emergency backup or as part of a solar energy system.

Designed For:

  • 48V Applications
  • Residential Power Systems
  • Home Solar Systems
  • UL-Certified ESS
  • Cabins & Tiny Homes
  • Family Homes & Mansions
  • Off-Grid Homesteads
  • Emergency Power
  • Whole Home Backup
  • Lead Acid Replacement
  • Intense Heat & Cold

BigBattery 48V ETHOS 10.2KWH (2 Module) Bundle Includes: 

  • 1 √ó ETHOS Control Box.
  • 2 √ó 48V ETHOS 5.12kWh Stackable Battery Module
  • 1 √ó 10kWh Ethos Controller to Battery Power Cable 31.5″ inch (800mm)

2 Stack Specs: 

 SKU:  BNDL-B0003
 System Voltage:  48V
 Nominal Voltage:  51.2V
 Chemistry:  LiFePO4
 kWh Capacity:  10.24kWh
 Ah Capacity:  200Ah
 Charging Voltage Range:  55.6 Р57V
 Max Charge Voltage:  57V
 Operating Voltage Range:  48 – 57V
 Suggested Low Voltage Cutoff:  48 – 50.8V
 Cell Configuration:  16S 2P
 Max Continuous Discharge Current:  200A
 Max Continuous Power:  10240W
 Max Discharge Peak Current:  300A (Max 5 seconds)
 Max Charge Current:  200A
 Charge Temperature Range:  32°F Р113°F (0°C Р45°C)
 Discharge Temperature Range:  -4°F Р140°F (-20°C Р60°C)
 Optimal Discharge Temperature Range:  59°F Р95°F (15°C Р35°C)
 Storage Temperature Range (SoC >50%):  -4°F Р113°F (-20°C Р45°C) (Max 6 months)
 Depth:  6.7 in (170 mm)
 Width:  26.5 in (674 mm)
 Height:  43.3 in (1100 mm)
 Max Connections:  Up to (16) parallel connections per control box
 Protection Rating:  IP65
 Communications:  CANBus / RS485
 Certifications:  UL9540, UL9540a, UL1973, & UN38.3

Reviews

There are no reviews yet.

Be the first to review “BigBattery 48V ETHOS 10.24kWh LiFePO4 Battery Bank”

Your email address will not be published. Required fields are marked *

Frequently Asked Questions

A gas generator burns fuel every time it runs — $150 to $400 per month depending on usage, plus oil changes, spark plugs, and noise complaints. The ETHOS 10.24kWh bank stores energy from your solar array at zero marginal cost per cycle. Over five years of regular backup use, the fuel savings alone typically exceed the purchase price. This is an investment that pays for itself, not an expense that repeats.
Yes. Off Grid Vault is an authorized dealer, which means warranty claims go through us directly — not through a ticket queue with a third-party marketplace. If a cell or BMS issue arises under the manufacturer warranty, you contact us and we handle it. That accountability matters when you are investing in a battery bank designed to last a decade.
The ETHOS system operates at 48V nominal (51.2V actual) with a charging voltage range of 55.6–57V and max continuous discharge of 200A. Most 48V hybrid inverters are compatible within these parameters. If you want confirmation for your specific inverter model, our free system design consultation will verify compatibility before you purchase.
This bundle ships free via LTL freight. Lead times vary based on current inventory at BigBattery's warehouse. We provide real-time updates after your order is placed — no fabricated countdowns. If you need a firm delivery window before committing, contact us and we will check current stock and estimated ship date.
The ETHOS system uses Tier 1 LiFePO4 cells with an advanced BMS that monitors each cell for voltage, current, and temperature anomalies. If a module issue occurs, the manufacturer warranty covers it — and as an authorized dealer, Off Grid Vault processes that claim on your behalf. The modular design also means a single module can be swapped without taking your entire battery bank offline.
Yes. The ETHOS Control Box supports up to 80kWh of stacked modules. You can start with this 10.24kWh two-module bundle and add 5.12kWh modules as your consumption grows. The control box manages communication across all modules through its unified BMS, so expansion does not require reconfiguring your inverter or rewiring your DC bus.
SKU: BNDL-B0003 Category: Brand:

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance and backed by people who understand off-grid power.

Free System Design Consultation Our engineers size your system for your actual consumption — no guesswork, no incompatible components.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Free Shipping Ships free on all orders, including LTL freight on large systems. No minimums, no surprise charges.

Related products

About bigbattery Wall Mount Batteries

bigbattery is a trusted manufacturer of premium wall mount batteries. OffGridVault is an authorized dealer offering the full bigbattery lineup with free delivery, price match guarantee, and expert support.

View all bigbattery products →

Related Categories

AC/DC Enclosure 2 products Air Handlers 8 products Air Heaters 2 products Amp Hub 2 products Awnings 15 products Batteries 3 products
Join the Grill Island Community

Expert Picks, Straight to Your Inbox

No spam. Just the gear worth knowing about.

No spam. Unsubscribe anytime.