BigBattery, K0198, NEXUS + APEX-10K Off-Grid System, 3x NEXUS + 1x APEX 6.5K

The images shown are for illustration purposes only and may not be an exact representation of the product

BigBattery, K0198, NEXUS + APEX-10K Off-Grid System, 3x NEXUS + 1x APEX 6.5K

Model: K0198
Manufactured by: BigBattery
Condition: New
Estimated Delivery: May 4th - May 10th
In Stock
Out of Stock

Price:

$14,189.50 $10,915.00

Manufacturer Info

Other products

The BigBattery APEX 10K + NEXUS™ Off-Grid System is a complete, high-performance energy solution engineered for true energy independence. Combining the powerful APEX 10K hybrid inverter with the NEXUS 48V 15kWh LiFePO? battery, this system delivers reliable, efficient energy for homes, cabins, and remote installations.

The APEX 10K provides split-phase 120/240V pure sine-wave output at 50/60Hz, supporting both everyday appliances and high-demand loads. Designed to pair seamlessly with modern lithium battery systems, it accepts solar and generator inputs for continuous, all-day operation. With an 80A pass-through, large appliances and critical loads run smoothly without interruption.

Built with advanced battery protection, safe lithium technology, and U.S.-supported engineering, this system is ideal for off-grid living, backup power, and energy security in demanding environments.

Ships From: Texas, USA
Warranty: 12 Years (Battery), 5 Years (Inverter)
Support: Lifetime USA-Based Tech Support

Compatibility

Integrated & Optimized System (Closed-Loop Communication)

APEX 10K Hybrid Inverter + NEXUS 15kWh Battery

Expandable Design

Scale battery storage from 15kWh up to 225kWh
Supports solar + generator input configurations
Designed for off-grid and backup power applications

Key Features

Complete Off-Grid System – Inverter + battery solution designed to work seamlessly together
10kW Split-Phase Output – Powers 120/240V loads including large appliances and whole-home systems
15kWh LiFePO? Battery – Safe, high-capacity energy storage with long lifespan
6,000+ Cycle Life – Built for years of daily use and long-term savings
Solar + Generator Ready – Flexible power input for continuous energy availability
80A Pass-Through – Supports high-demand loads and critical circuits
Advanced BMS Protection – Multi-layer protection for safe and reliable operation
Modular Expansion – Easily scale storage capacity as energy needs grow
UPS Backup Capability (15–30ms) – Seamless transition during outages
Indoor-Rated Design – Intended for installation in protected environments
Maintenance-Free Operation – No routine servicing required

A powerful, rugged off-grid energy system built for reliability, flexibility, and long-term independence – backed by U.S.-based support you can trust.

Battery Specifications

Battery Specifications: NEXUS 15KWh
System Voltage: 48V
Nominal Voltage: 51.2V
Chemistry: LiFePO4
Usable Energy (kWh): 15kWh
Ah Capacity: 300Ah
Cell Configuration: 16S1P
Max Continuous Discharge Current: 140A
Max Continuous Power: 7.6kW
Max Discharge Peak Current: 270A(1s)
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 Temp Range: 32°F to 113°F
Discharge Temp Range: -4°F to 113°F
Optimal Discharge Temp: 59°F to 95°F
Storage Temp Range (SoC >50%): (1 month: -4°F ~ 113°F | 3 months: -4°F ~ 95°F | 6 months: -4°F ~ 77°F)
Humidity Range: 10%-95% (No Condensation)
Weight (lbs): ~315 lbs
Dimensions (WxHxD): 19.7 x 27.5 x 15.7 in (500×700×400 mm)
Altitude Limit: <2000m
Max Connections: 15 in parallel (up to 225kWh)
Communications: RS485 / RJ45 / CAN
Protection Rating: IP54
Installation: Indoor Floor-standing

Inverter Specifications

Document Title: APEX-6.5K & APEX 10K
Brand: BigBattery
Model: APEX-6.5K / APEX-10K
Section: Inverter output
Rated Output Power: APEX-6.5K: 6,500W; APEX-10K: 10,000W
Max. Output Power: APEX-6.5K: 13,000VA; APEX-10K: 20,000VA
Rated Output Voltage: 120/240 Vac (single-phase / split-phase)
Load capacity of motors: APEX-6.5K: 4 HP; APEX-10K: 6 HP
Rated Frequency: 50/60Hz
Output Wave: Pure sine wave
Switching Time: 10ms (typical value)
Section: Battery
Battery Type: Lithium-ion battery / lead-acid battery / user-defined battery
Rated Battery Voltage: 48V
Voltage Range: 40–60Vdc
Max. Solar Charging Current: APEX-6.5K: 140A; APEX-10K: 200A
Max. Grid / Generator Charging Current: APEX-6.5K: 80A; APEX-10K: 120A
Max. Hybrid Charge Current: APEX-6.5K: 140A; APEX-10K: 200A
Section: Solar input
No. of MPPT: 1 + 1
Max. Input Power: APEX-6.5K: 5,000W + 5,000W; APEX-10K: 5,000W + 5,500W
Max. Input Current: APEX-6.5K: 18A + 18A; APEX-10K: 22A + 22A
Max. Open Circuit Voltage: 550Vdc + 550Vdc
MPPT Voltage Range: 125–450Vdc
Section: Grid / Generator input
Input Voltage Range: 65–140Vac
Input Frequency Range: 50/60Hz
Bypass Overload Current: APEX-6.5K: 40A; APEX-10K: 63A
AC Inputs: APEX-6.5K: 2 inputs (Grid & Generator); APEX-10K: 1 input (Grid or Generator)
Section: Efficiency
Max. Efficiency: 99.9%
MPPT Tracking Efficiency: APEX-6.5K: 93%; APEX-10K: 92%
Parallel Capacity: Up to 6 units (3 or more units in parallel can form a three-phase output)
Section: General data
Dimension: APEX-6.5K: 25.51 × 16.14 × 5.51 inches; APEX-10K: 28.46 × 17.64 × 5.91 inches
Weight: APEX-6.5K: 48 lbs; APEX-10K: 62 lbs
Protection Degree: IP20 (indoor only)
Temperature: 14–131°F, derate above 113°F
External Module (Optional): Wi-Fi / GPRS
Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2
Noise: <60dB
Cooling Method: Intelligent fan
Warranty: 5 years
Communication: RS485 / CAN / USB / Dry contact
Integrated Circuit Breaker: Utility / Load / Battery / PV
Section: Overload protection
Overload protection behavior: After overload protection is enabled, the inverter output will be restored after 3 minutes, and after 5 times of overload, the output will be off until the inverter is restarted. (102% < APEX-10K load < 110%): an error will be reported and the output will be turned off after 5 minutes. (110% < load < 125%): an error will be reported and the output will be turned off after 10 seconds. Load > 125%: an error will be reported and the output will be turned off after 5 seconds.
Protection features: Has PV input current limiting protection, PV input over-voltage protection, PV night reverse current protection, AC input over-voltage protection, AC input under-voltage protection, battery over-voltage protection, battery under-voltage protection, battery over-current protection, AC output short-circuit protection, heat sink over-temperature protection, inverter over-load protection.