Big Battery | 24kW | 40.9kWh | ETHOS Energy Storage System (ESS)
24kW | 40.9kWh | ETHOS Energy Storage System (ESS)
Advanced Residential Energy Storage for Large Homes and Estates
Unlock a new era of residential power with the BigBattery 48V ETHOS 40.9kWh Energy Storage System (ESS). Designed for medium to large family homes, multi-room properties, and multi-level estates, this system delivers robust, scalable, and secure power storage—backed by the trusted performance of BigBattery.
Whether you're powering your home during blackouts, lowering your energy bills, or maximizing solar energy use, the ETHOS offers a future-ready solution for grid-tied applications and hybrid solar systems.
Powerful, Flexible, and Future-Proof
This 40.9kWh outdoor configuration is paired with 24kW output via dual 12000W Lux inverters, making it ideal for high-energy-demand households. Its stackable, modular design ensures long-term flexibility, allowing you to expand your system as your energy needs grow.
-
Outdoor Rated: IP65-certified enclosure for all-weather durability
-
Smart Build: Includes internal fire suppression and a high-efficiency BMS with auto cell-balancing
-
Easy Install: Comes complete with mounting hardware for wall, garage, or shed installations
Intelligent Monitoring & Safety Features
Stay in control with advanced real-time monitoring and built-in protections:
-
LED Display Control Panel: User-friendly interface for live status updates
-
Communication Ready: Integrated CANBus and RS485 protocols for system monitoring
-
Smart BMS (Battery Management System): Maintains peak performance and longevity
Dual 12000W Lux Inverters Included
Each ETHOS system includes two 12kW Lux inverters, offering industry-leading inverter technology for reliable, seamless operation:
-
Touchscreen LCD Displays for intuitive management
-
Three MPPT Inputs Per Inverter to capture the most solar energy possible
-
Integrated UPS Modules for instant on/off-grid switching
-
Peak Shaving & Load Management to optimize your energy consumption and savings
-
Supports Up to 36,000W of PV Input for high solar compatibility
-
AC Coupling for Flexible System Design
Key Benefits:
-
24kW Power Output & 40.9kWh Storage: Ideal for heavy appliance loads, HVACs, EVs, and entire home systems
-
Expandable Energy Solution: Easily scale with future battery additions
-
Reliable Backup Power: Protects your home from grid outages
-
Smart Energy Management: Maximize efficiency and lower utility bills
-
Tax Incentive Eligible: Designed to qualify for solar credits and net metering
-
Sustainable Living: Reduces carbon footprint while enhancing energy independence
Experience Next-Level Energy Control with the 48V ETHOS
The 24kW | 40.9kWh ETHOS Energy Storage System (ESS) is more than just a battery — it’s a comprehensive, high-capacity, smart energy solution. Backed by BigBattery’s engineering excellence and advanced safety features, it ensures your home stays powered, efficient, and future-ready.
Empower your lifestyle with a scalable, smart energy system designed to evolve with your needs.
What's Included
9 × 48V ETHOS 5.12kWh Stackable Battery Module
2 × ETHOS Control Box
2 × ETHOS RACK BASE
2 × LUXPower 12kW Hybrid Inverter
1 × Parallel Busbar
4 × Ethos Parallel Power Cable 4.9 ft (1500mm)
2 × Ethos Parallel Comm Cable 4.9 ft (150cm)
Specs and Downloads
| SKU: | K0960 |
| GTIN-12 (U.P.C.): | 850061252159 |
| 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 |
| BMS Cutoff Range: | 42 - 47V |
| Cell Configuration: | 16S 2P |
| Max Continuous Discharge Current: | 250A |
| Max Continuous Power: | 12800W |
| Max Discharge Peak Current: | 300A (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: | UL9540, UL9540A, UL1973, & UN38.3 |
User Manual
UL9540 Certification
UL1973 Certification
Safety Data Sheet
Inverter
User Manual
Rapid ShutDown Certificate
UL1741 Certificate
IEEE1547 Certificate
Are Solar Guys Pro Authorized Retailers?
Yes! We are proud to be one of the few online retailers who are authorized retailers for every single product we carry!
Being an authorized retailer means we carry the same warranty as the manufacturer, protecting your purchase!
When Will My Order Ship?
Most orders ship within 1–3 business days. You’ll get a tracking number as soon as it ships via email!
Do We Accept Returns?
Yes absolutely, we have a no-hassle, 30-day return policy on all items! To refer to the full policy, click HERE
Are Products Brand New?
Yes! By default, all products on Solar Guys Pro are 100% brand-new and in perfect condition.
If an item is used or refurbished, it will clearly indicate so in the title of the product as well as the discription.
For example, a used Battery will say:
XYZ Battery | 48V 100AH (REFURBISHED)
If you'd like to confirm, you can always send us a email at info@solarguyspro.com
Orders over $500 include a FREE (Normally $149.99) 80-Page DIY Solar eBook — added automatically at checkout.
Frequently Asked Questions
Get your 30% Tax Solar Credit!
Unlock substantial savings with the government's Solar Tax Credit, which offers a robust 30% deduction on the installation costs of solar systems. This attractive incentive is your ticket to leveraging solar energy's eco-friendly potential while enjoying the financial benefits.
At Solar Guys Pro, our commitment is to you. Please be reminded that our expertise does not extend to tax advice. Nonetheless, our dedicated staff is eager to guide you through the process and ensure you capitalize on this exceptional offer.
Contact us now to learn more!