Description
Big Battery | 51.2V NEXUS 2 LiFePO4 Battery 314Ah 16kWh
NOTE: Pre-order ETA is end of September.
The Big Battery NEXUS 2 is a 51.2V 314Ah LiFePO4 energy-storage battery providing 16.08kWh of usable energy for off-grid homes, cabins, backup power, and scalable solar systems. It features a floor-standing design, self-heating, integrated aerosol fire suppression, advanced BMS protection, and RS485, RJ45, and CAN communication. Up to 15 units can be connected in parallel for expanded energy storage.
KEY FEATURES
- 16.08kWh Usable Energy – Provides 314Ah of LiFePO4 energy storage at a 51.2V nominal voltage.
- 150A Continuous Discharge – Supports up to 150A continuous discharge with 7.6kW maximum continuous power.
- 270A Peak Discharge – Supports peak discharge current of 270A for 1 second.
- 8,000+ Cycle Life – Designed for long-term daily cycling and energy-storage applications.
- Self-Heating Function – Supports charging from 32°F to 113°F for cold-weather operation.
- Integrated Aerosol Fire Suppression – Built-in thermal suppression provides an additional layer of system protection.
- Advanced BMS Protection – Provides monitoring and protection for voltage, current, and temperature conditions.
- 15-Unit Parallel Expansion – Supports up to 15 batteries connected in parallel according to the published battery specifications.
- Multiple Communication Ports – Includes RS485, RJ45, and CAN interfaces for compatible inverter and system integration.
- Compact Floor-Standing Design – Designed for indoor floor-standing installation without requiring wall mounting.
- Broad Inverter Compatibility – Compatible with supported Big Battery, EG4, GoodWe, Solis, Deye, PYLON, and Victron systems.
- 12-Year Warranty – Backed by Big Battery’s published 12-year battery warranty.
Specifications
| Brand | Big Battery |
| Product Name | NEXUS 2 LiFePO4 Battery |
| SKU | F-NXUS2-48161-G1 |
| GTIN / UPC | 00199874694771 |
| System Voltage | 48V |
| Nominal Voltage | 51.2V |
| Chemistry | LiFePO4 |
| Usable Energy | 16.08kWh |
| Ah Capacity | 314Ah |
| Cell Configuration | 16S1P |
| Max Continuous Discharge Current | 150A |
| Max Continuous Power | 7.6kW |
| Max Discharge Peak Current | 270A (1 second) |
| Max Charge Current | 140A |
| Charging Voltage Range | 53.5V–57.6V |
| Operating Voltage Range | 48V–57.6V |
| Max Charge Voltage | 57.9V |
| Suggested Low Voltage Cutoff | 50.8V |
| Charge Temperature Range | 32°F–113°F |
| Discharge Temperature Range | -4°F–113°F |
| Optimal Discharge Temperature | 59°F–95°F |
| Storage Temperature, SoC >50% | 1 month: -4°F–113°F; 3 months: -4°F–95°F; 6 months: -4°F–77°F |
| Humidity Range | 10%–95% RH, non-condensing |
| Weight | Approximately 315 lbs |
| Dimensions (W × H × D) | 19.7 × 27.5 × 15.7 in (500 × 700 × 400 mm) |
| Altitude Limit | <2,000m |
| Maximum Connections | 15 batteries in parallel |
| Communication Ports | RS485 / RJ45 / CAN |
| Protection Rating | IP54 |
| Installation | Indoor, floor-standing |
| Self-Heating | Yes |
| Integrated Thermal Suppression | Aerosol fire suppression |
| Cycle Life | 8,000+ cycles |
| Warranty | 12 Years |
