Everything You Need, Included
Everything in the box
1× BigBattery 51.2V NEXUS 2 LiFePO4 Battery
1× EG4 6000XP (8kPV) OFF-GRID INVERTER
1× 2AWG (Black and Red) 3FT Ring to Ring Terminal Cable- U.S. Support
- LiFePO₄ Safety
BigBattery NEXUS 2 Battery + EG4 6000XP Inverter| 16 kWh | Off-Grid ESS System
Choose Your Inverter Option*
Converts battery power to usable electricity.
Choose Your Battery Option*
Stores your energy for when you need it.
Choose Your Inverter Option*
Converts battery power to usable electricity.
BigBattery APEX-6.5K Off-Grid Inverter
EG4 6000XP (8kPV) OFF-GRID INVERTER
EG4 12000XP V2 OFF-GRID INVERTER
Victron MultiPlus-II 48/5000/70-95 120V
Victron MultiPlus-II 48/3000/35-50 120V (UL 1741)
EG4 18kPV All-in-One Hybrid Solar Inverter
EG4 FlexBOSS18 Hybrid Solar Inverter
EG4 FlexBOSS21 Hybrid Solar Inverter
NoneI already have an inverter Choose Your Battery Option*
Stores your energy for when you need it.
Choose Your Battery Option*
Stores your energy for when you need it.
Choose Your Inverter Option*
Converts battery power to usable electricity.
Choose Your Battery Option*
Stores your energy for when you need it.
Choose Your Inverter Option*
Converts battery power to usable electricity.
Choose Your Battery Option*
Stores your energy for when you need it.
Choose Your Battery Option*
Stores your energy for when you need it.
Choose Your ESS Configuration*
Compare the available system sizes and choose the configuration that fits your power needs.
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Documents & Certifications
Battery
About this item
The BigBattery NEXUS 2 + EG4 6000XP ESS System delivers dependable off-grid power, high-capacity energy storage, and flexible system expansion for homes, cabins, workshops, and backup-power applications. Combining the 16kWh NEXUS 2 LiFePO₄ battery with the efficient EG4 6000XP off-grid inverter, this system provides a powerful foundation for energy independence in a compact, durable configuration.
The EG4 6000XP delivers 6,000W of continuous split-phase 120/240V output with up to 12,000W of surge power for approximately 3.5 seconds. Its dual MPPTs can utilize up to 8,000W of solar power, with support for up to 10,000W of recommended connected PV capacity, providing strong solar production and efficient battery charging throughout the day.
Paired with the NEXUS 2—featuring 16kWh of LiFePO₄ storage, 314Ah capacity, 150A continuous discharge, and up to 7.6kW of continuous battery power—the system can reliably support household essentials, appliances, tools, pumps, and other demanding off-grid loads. A peak discharge current of 270A for one second provides additional support when equipment initially starts.
The NEXUS 2 features an integrated BMS with multiple safety redundancies, RS485 and CAN communication interfaces, and a rugged IP54-rated floor-standing enclosure suitable for indoor or outdoor installation. Its advanced LiFePO₄ cells are rated for more than 8,000 cycles, providing over 12 years of service when cycled daily under appropriate operating conditions.
The EG4 6000XP can operate entirely off-grid or use grid or generator input for supplemental charging and load support. Built-in Wi-Fi connectivity enables remote monitoring and adjustments through EG4 software, while its LCD and LED interface provides convenient on-site system visibility.
Ships From: Texas, USA
Warranty: 12 Years (Battery), 5 Years (Inverter)
Support: Lifetime USA-Based Tech Support
Compatibility
Integrated & Optimized System:
- BigBattery NEXUS 2 48V LiFePO₄ Battery + EG4 6000XP Off-Grid Inverter
- Matched 48V battery and inverter architecture
- NEXUS 2 provides sufficient continuous power for the inverter’s full 6,000W output
- RS485 and CAN communication interfaces available for supported system integration
Expandable & Flexible:
- Expand the NEXUS 2 battery bank up to 15 batteries in parallel
- Maximum battery configuration rated at up to 241.5kWh
- Parallel up to 16 EG4 6000XP inverters for expanded output capacity
- Supports solar, battery, grid-assisted, and generator-assisted operation
- Suitable for homes, cabins, workshops, sheds, and critical-load backup systems
Key Features
- Complete Off-Grid ESS SolutionHigh-capacity battery and split-phase inverter system designed for reliable energy independence
- 6,000W Continuous OutputSupplies 120/240V split-phase power from a single inverter
- 12,000W Surge CapacitySupports demanding startup loads for approximately 3.5 seconds
- 8,000W Utilized PV InputStrong solar charging capacity across two independent MPPTs
- Up to 10,000W Recommended Solar InputAllows additional connected array capacity for improved production conditions
- 16kWh LiFePO₄ BatteryHigh-capacity energy storage with a 314Ah rating
- 7.6kW Continuous Battery PowerProvides sufficient output to support the inverter at full rated power
- 150A Continuous DischargeHandles demanding off-grid and backup loads
- 270A Peak DischargeProvides short-duration support for equipment startup
- 8,000+ Battery CyclesEngineered for more than 12 years of daily cycling
- Integrated Battery Management SystemMultiple safety redundancies protect the battery and connected equipment
- Dual MPPT Solar InputsEnables flexible solar-array configuration without requiring a combiner box in many installations
- High-Voltage PV SupportAccepts solar input from 100–480VDC with a 120–385VDC MPPT operating range
- Fast Transfer TimeLess than 15ms with one inverter to help maintain power to connected loads
- Grid and Generator SupportUses AC input for supplemental charging and load support
- Remote Wi-Fi MonitoringView system performance and make adjustments through EG4 monitoring software
- Expandable Battery StorageConnect up to 15 NEXUS 2 batteries in parallel
- Expandable Inverter OutputParallel up to 16 EG4 6000XP inverters for larger systems
- Indoor/Outdoor Battery InstallationRugged IP54-rated, floor-standing battery enclosure
- Maintenance-Free OperationLong-lasting LiFePO₄ chemistry with no routine servicing required
A powerful and expandable off-grid energy system engineered for reliable solar production, long-duration battery storage, backup protection, and lasting energy independence.
DOWNLOADBattery Specifications
*The battery will start charging at at 32°F after the heating element has taken effect.
Inverter Downloads
GO TO LINKInverter Specifications
12 Year Warranty
Battery Specifications
*The battery will start charging at at 32°F after the heating element has taken effect.
Inverter Downloads
Inverter Specifications
12 Year Warranty
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BigBattery NEXUS 2 Battery + EG4 6000XP Inverter| 16 kWh | Off-Grid ESS System
