Big Battery | 12kW 40.9kWh ETHOS Energy Storage System (ESS)
Overview
REVOLUTIONIZING RESIDENTIAL ESS! BigBattery’s 48V ETHOS system is here to redefine home power storage. This 40.9kWh setup is perfect for grid-tied energy needs in homes of all sizes, delivering unmatched safety, reliability, and cutting-edge features.
The ETHOS System is a modular and stackable solution for easy expansion. With IP65-rated protection, an internal fire suppression system, and an advanced BMS with auto cell-balancing, this unit is designed for maximum safety and durability. An interactive LED display and CANBus and RS485 communication provide real-time monitoring, while all hardware is included for quick wall mounting.
The ETHOS pairs seamlessly with a 12,000W Lux inverter, equipped with an LCD touchscreen, 3 MPPT inputs, an integrated UPS module for smooth grid switching, and support for PV arrays up to 18,000W. Features like smart load control, AC coupling, and peak shaving help you manage power needs efficiently, protect against grid instability, and reduce monthly utility costs.
Whether you need reliable backup power or a robust solar system, the ETHOS delivers consistent, efficient energy, helping you save on bills and benefit from net metering and tax incentives. Take control of your home’s energy with the 48V ETHOS today!
What's Included
8 × 48V ETHOS 5.12kWh Stackable Battery Module
1 × ETHOS Control Box
2 × ETHOS RACK BASE
1 × LUXPower 12kW Hybrid Inverter
1 × 10kWh Ethos Controller to Battery Power Cable 31.5" inch (800mm)
2 × Ethos Parallel Comm Cable 4.9 ft (150cm)
4 × Ethos Parallel Power Cable 4.9 ft (1500mm)
Specs and Downloads
System Spec Sheet
Inverter Spec Sheet
Single Stack Tech Specs
| SKU: | K0753 |
| 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 |
Inverter
Registration & WiFi Setup Guide
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We do not sell any used or refurbished items.
Frequently Asked Questions
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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.
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