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BigBattery|6kW 10.2kWh ETHOS Off-Grid Power System
BigBattery|6kW 10.2kWh ETHOS Off-Grid Power System
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BigBattery’s 48V ETHOS systems are here, and this 10.24kWh configuration is the ideal solution for off-grid power in your tiny home, cabin, or homestead, supported by comprehensive safety, reliability, and state-of-the-art features.
The ETHOS System was built to be a versatile off-grid power solution, with a stackable, modular design for easy expandability, and all hardware included to mount your ETHOS to your wall with an effortless installation. The ETHOS comes equipped with an IP65-rated casing, an internal fire suppression system, as well as an advanced BMS with auto cell-balancing to ensure long-lasting safety and reliability. Plus, its control box features an interactive LED display, along with CANBus and RS485 communication protocols, so you can always monitor the status and performance of your power.
But that’s not all. We pair our ETHOS with a cutting-edge 6000W split-phase inverter & charger from EG4, which features its own LCD touch screen display, 2 MPPT inputs, an integrated UPS module for seamless on and off-grid switching, and the ability to handle PV arrays of up to 8000W. Plus, through its smart load control, AC coupling abilities, and peak shaving function, you can meet your power needs and protect your home against unstable grids or rolling blackouts, while seeing huge savings each month on your electric bill through peak shaving and time-of-use offsetting.
Whether you’re looking to ensure emergency backup power is always available, or you’re looking to outfit your home with a uninterrupted power system to last all season, or all year long, the ETHOS ensures reliable, efficient power delivery day in and day out, allowing you to save on utilities, and most importantly, stay powered and prepared. Take control of your power and shop the 48V ETHOS today.
Kit Includes:
Designed For 48V Applications
Tech Specs
Single Module Tech Specs
System Voltage: | 48V |
Nominal Voltage: | 51.2V |
Chemistry: | LiFePO4 |
kWh Capacity: |
10.24kWh |
Ah Capacity: | 200Ah |
Charging Voltage Range: | 55.6 – 57V |
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: | 200A (Max 5 seconds) |
Max Charge Current: | 200A |
Charge Temperature Range: | 32°F – 113°F (0°C – 45°C) |
Discharge Temperature Range: | -4°F – 140°F (-20°C – 60°C) |
Optimal Discharge Temperature Range: | 59°F – 95°F (15°C – 35°C) |
Storage Temperature Range (SoC >50%): | -4°F – 113°F (-20°C – 45°C) (Max 6 months) |
Weight: | 273 lb (123.8 kg) |
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 / NEMA 4X |
Communications: | CANBus / RS485 |
Certifications: | UL9540a, UL1973, & UN38.3 |
Inverter Specs
AC Input
AC Voltage: | 120V AC / 240V AC |
AC Frequency: | 50 Hz / 60 Hz |
Max. Continuous AC Current: |
37.5A @ 240V |
Max. AC Input Power: | 9000W |
Max. AC Bypass: | 50A |
AC OUTPUT
Output Voltage: |
120V AC / 240V AC |
Output Frequency: |
50 Hz / 60 Hz |
Max. Continuous Output Current: |
25A @ 240V |
Output Power: | 6000W |
Surge Capacity: |
12000W (3.5 sec) / 11000W (5 sec) |
Power Factor: | 0.99 (Full Load) |
Reactive Power Adjustment Range: | -0.8 ~ 0.8 Leading Adjustable |
Total Harmonic Distortion: | <3% |
Switching Time: | <15 ms (Single) / <30 ms (Parallel) |
PV INPUT
No. of MPPTs: | 2 (1) |
Max. Input Current: |
17A / 17A |
Max. Short Circuit Input Current: |
25A / 25A |
DC Input Voltage Range: |
100 - 480V DC |
Start Up Voltage: |
100V DC ± 10V DC |
MPPT Operating Voltage Range: | 120 - 385V DC |
MPPT Voltage: | 320V DC |
Max. PV Array Power: | 8000W (4000W per MPPT) |
Max. Efficiency: | 99% |
BATTERY
Nominal Voltage: | 48V DC |
Voltage Range: |
46.4 - 60V DC |
Max. Discharge Current: |
140A |
Max. Charge Current: |
125A |
DC Cut-Off Voltage: | 59V DC |
DC Recovery Voltage: | 57.4V DC |
Charge Cut-Off Voltage: | 58.4V DC |
OPERATING ENVIRONMENT
Operating Temperature Range: | 32ºF - 113ºF (0ºC - 45ºC) |
Storage Temperature Range: | 5ºF - 140ºF (-15ºC - 60ºC) |
Altitude: | <6,561 ft (2000 m) |
Relative Humidity: |
5 - 95% |
Typical Noise Emission: |
<58 dB |
Protection Rating: |
IP20 |
Max. Parallel Connections: | 16 |
DIMENSIONS
Weight: | 52.9 lbs (24 kg) |
Depth: |
5.25 in (132 mm) |
Width: |
18 in (457 mm) |
Height: | 25.5 in (648 mm) |
Inverter Downloads
Warranty: | Warranty |
Spec Sheet: | Spec Sheet |
User Manual: | User Manual |
Monitoring System Guide: | Monitoring System Guide |
UL1741 Certificate: | UL1741 Certificate |
Monitoring Adapter Installation Guide: | Monitoring Adapter Installation Guide |





Introducing the 48V ETHOS
The next generation of residential ESS is here! The 48V LiFePO4 ETHOS is a UL-certified, CEC-listed solution designed to provide reliable power storage for every home in America. Boasting a stackable, modular design, with all cables and components included, the ETHOS is easily installed to your wall & affords the ability to expand upon your system later on. We pair the ETHOS with a cutting-edge, UL1741-certified LUXPower inverter capable of supporting 18kW PV arrays, but the ETHOS is compatible with dozens of 48V inverters in case you already have one setup at home. Be sure to check in with your local AHJ to confirm your desired system is compliant with all state and regional regulations.
With preconfigured systems for indoor & outdoor installations, you can shop confidently knowing that BigBattery has a power system to support your energy needs. Plus, for solar installers, flexible system configurations & special installer financing options make the ETHOS the ideal battery solution for your installs. Check out our all-new 48V ETHOS Systems below!
BigBattery ETHOS - The Future of UL-Certified Energy Storage Systems
ETHOS Expansion Kit | Integrate Seamless Power & Modular Versatility
BigBattery's 48V ETHOS - UL-Certified Lithium Energy Storage System
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UL-Certified 48V ETHOS - Product Unboxing
FAQ
How do I connect this battery into my existing system?
These batteries use a standard
amphenol ESS connector. Each
module can be connected using the included cables. You
may also purchase additional
cables from BigBattery.
How many times can I putthis battery in parallel/series?
These batteries are not series
capable but can be connected
in parallel up to 16 times. Make
sure that the total amount of
these batteries in your configuration never exceeds sixteen total batteries. When connecting
batteries in parallel, ensure all
batteries are within 0.3 volts of
one another.
How long will my battery last,and what do I do at the end ofits life?
Lithium iron phosphate (LiFePO4) batteries can be cycled
from 3500 - 5000 times (80%
DoD, 0.5C). If you cycle the battery daily, you can get over 10
years of use from your battery.
When your battery is at the end
of its lifespan, contact us & we’ll
recycle it for you, free of charge!