
Big Battery | 24kW | 30.7kWh | ETHOS Energy Storage System (ESS)
Overview
REVOLUTIONIZING RESIDENTIAL ENERGY STORAGE! BigBattery’s 48V ETHOS systems are here, featuring a powerful 30kWh outdoor configuration—the ultimate solution for grid-tied power in homes, cabins, or large estates. With cutting-edge safety, exceptional reliability, and innovative design, the ETHOS system meets all your power needs with ease.
Designed for flexibility, the ETHOS system is stackable and modular, allowing for easy expansion. All necessary hardware for mounting on exterior walls, garages, or sheds is included, making installation a breeze. Built to last, the system features an IP65-rated casing, internal fire suppression, and an advanced BMS with auto cell-balancing to maximize safety and performance.
The system’s control box offers an intuitive LED display, along with CANBus and RS485 communication protocols, giving you real-time access to system health and performance.
Paired with two 12000W Lux inverters, each equipped with LCD touchscreens, 3 MPPT inputs, and integrated UPS modules for seamless on/off-grid switching, the ETHOS system can handle up to 36000W of solar capacity. Features like smart load control, AC coupling, and peak shaving optimize your system’s energy use, protect against grid instability, and save on monthly utility bills.
Whether you need backup power or are outfitting your home with a high-performance solar solution, the ETHOS guarantees reliable, efficient power all year long, helping you lower energy costs, qualify for net metering, and take advantage of tax incentives. Take control of your energy today with the 48V ETHOS!
Key Features:
- 30kWh Outdoor Configuration: Ideal for large homes or estates
- Modular & Stackable: Easily expandable as needed
- Weatherproof: IP65-rated casing with internal fire suppression
- Advanced BMS: Auto cell-balancing for enhanced performance
- Real-Time Monitoring: LED display with CANBus/RS485 communication
- Dual 12000W Lux Inverters: LCD touch screens, 3 MPPT inputs each, integrated UPS modules
- High PV Capacity: Supports up to 36000W of solar power
- Smart Energy Management: Load control, AC coupling, and peak shaving for maximum savings
What's Included
6 × 48V ETHOS 5.12kWh Stackable Battery Module
2 × ETHOS Control Box
2 × LUXPower 12kW Hybrid Inverter
2 × 15kWh Ethos Controller to Battery Power Cable 4ft (1220mm)
1 × Parallel Busbar
Specs and Downloads
SKU: | K0959 |
GTIN-12 (U.P.C.): | 850061252142 |
System Voltage: | 48V |
Nominal Voltage: | 51.2V |
Chemistry: | LiFePO4 |
kWh Capacity: | 15.36kWh |
Ah Capacity: | 300Ah |
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 3P |
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: | 387 lb (175.5 kg) |
Depth: | 6.7 in (170 mm) |
Width: | 26.5 in (674 mm) |
Height: | 59.8 in (1520 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!
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! All products on Solar Guys Pro are 100% brand-new and in perfect condition.
We do not sell any used or refurbished items.
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!