BigBattery 48V ETHOS 20.2KWH (4 Module)
The BigBattery ETHOS 48V energy storage system (ESS) is a modular, stackable solution designed for residential grid-tied applications. It provides reliable daytime power, backup capacity, and compatibility with net metering programs. The 4-module configuration integrates with a 12,000 W Lux inverter to deliver scalable energy storage for family homes, cabins, or large residences, while meeting UL certifications and IP65 protection for durable indoor or sheltered outdoor installation. Built around an advanced BMS with auto cell-balancing, the ETHOS is engineered for long‑term safety, reliability, and simple expandability.
Performance specifications
- System Voltage: 48V
- Nominal Voltage: 51.2V
- Chemistry: LiFePO4
- kWh Capacity: 10.24kWh
- Ah Capacity: 200Ah
- Charging Voltage Range: 55.6 - 57V
- Max Charge Current: 200A
- Max Continuous Discharge Current: 200A
- Max Continuous Power: 10240W
- Max Discharge Peak Current: 300A (Max 5 seconds)
- Operating Voltage Range: 48 – 57V
- Suggested Low Voltage Cutoff: 48 – 50.8V
- BMS Cutoff Range: 42 - 47V
- Cell Configuration: 16S 2P
- 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)
- Dimensions: 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: UL954
Safety features and certifications
- IP65 enclosure protects against dust and water exposure for indoor or sheltered outdoor installation
- Advanced BMS with auto cell-balancing to maintain safe, balanced operation across all modules
- CANBus and RS485 communications for robust monitoring and integration with auxiliary hardware
- UL954 certified ESS for documented safety compliance
Inverter integration and capabilities
Paired with a 12,000 W Lux inverter, the system provides an interactive LCD touchscreen, 3 MPPT inputs, and an integrated UPS module for seamless on/off-grid switching. It supports PV arrays up to 18,000 W, smart load control, AC coupling, and peak shaving functionality to stabilize home loads during grid fluctuations and maximize on-site solar utilization.
Installation and maintenance
The ETHOS design is modular and wall-mountable, with all hardware included for straightforward installation. The configuration supports flexible expansion while maintaining safe electrical limits. Routine maintenance is minimal: monitor connections and module integrity, ensure operation within the specified temperature ranges, and verify communication links (CANBus/RS485) during periodic system checks. Parallel expansions should remain within the per-control-box limit of 16 connections.
BigBattery ETHOS 20.2KWH (4 Module)
REVOLUTIONIZING RESIDENTIAL ESS! BigBattery’s 48V ETHOS systems are here, and this 20kWh indoor configuration is the ideal solution for grid-tied power in your family home, cabin, or mansion, supported by UL certifications and state-of-the-art features.
The ETHOS System was built to be a versatile home 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, 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 12000W Lux inverter, which features its own LCD touch screen display, 3 MPPT inputs, an integrated UPS module for seamless on and off-grid switching, and the ability to handle PV arrays of up to 18000W. 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.
Whether you’re looking to ensure emergency backup power is always available, or you’re looking to outfit your home with a powerful solar system, the ETHOS ensures reliable, efficient power delivery day in and day out, allowing you to save on utilities, or get rewarded for giving back to the grid through net metering programs and other tax incentives. Take control of your home’s power and shop the 48V ETHOS today!
Designed For 48V Applications
Product Specifications
BigBattery ETHOS 20.2KWH (4 Module) Product Specifications
| 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: | 200A |
| Max Continuous Power: | 10240W |
| 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 |
| Communications: | CANBus / RS485 |
| Certifications: | UL9540, UL9540a, UL1973, UN38.3, & CE |
Kit Included
- 1 × ETHOS Control Box
- 4 × 48V ETHOS 51.2V100Ah Stackable Type
- 1 × ETHOS Rack Base
- 1 × Ethos Parallel Comm Cable 4.9 ft (1500mm)
- 2 × Ethos Parallel Power Cable 4.9 ft (1500mm)
Product Manual
| Spec Sheet Download: | Click Here |
| Safety Data Sheet Download: | Click Here |
| 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: | 200A |
| Max Continuous Power: | 10240W |
| 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 |
| Communications: | CANBus / RS485 |
| Certifications: | UL9540, UL9540a, UL1973, UN38.3, & CE |
| Spec Sheet Download: | Click Here |
| Safety Data Sheet Download: | Click Here |