Big Battery 48V 15kWH NEXUS LiFePO4 Battery + EG4 12000XP Inverter
NEXUS LiFePO₄ modules (15kWh each) pair with the EG4 12000XP delivering 12,000W split-phase per inverter and up to 24,000W PV input, ideal for grid-tied or off-grid whole-home and commercial backup; systems scale from 15kWh to 225kWh and up to 36kW output. Featuring dual MPPTs, built-in breakers, a 15–30ms UPS transfer switch, and remote monitoring, they ensure seamless and efficient performance. Lightweight and transformer-free, they support smart load control, AC coupling, and peak shaving to reduce energy costs while providing reliable backup power.
INCLUSIONS:
Nexus + EG4 12000XP (15kWh -12kW Power)
- 1x NEXUS 15kWh Battery – (F-NXUS-48150-G1)
- 1x EG4 12000XP Off-Grid Inverter – (INV030)
2 Nexus + EG4 12000XP (30kWh – 12kW Power)
- 2 x NEXUS 15.0 kWh Battery – (F-NXUS-48150-G1)
- 1 x EG4 12000XP Off-Grid Inverter – (INV030)
- Parallel BusBar (CNT015)
- 2AWG Black & Red Cable 3ft (CBL086)
3 Nexus + 1 EG4 12000XP (45kWh – 12kW Power)
- 3 x NEXUS 15.0 kWh Battery – (F-NXUS-48150-G1)
- 1 x EG4 12000XP Off-Grid Inverter – (INV030)
- Parallel BusBar (CNT015)
- 2AWG Black & Red Cable 3ft (CBL086)
2 Nexus + 2 EG4 12000XP (30kWh – 24kW Power)
- 2 x NEXUS 15.0 kWh Battery – (F-NXUS-48150-G1)
- 2 x EG4 12000XP Off-Grid Inverter – (INV030)
- Parallel BusBar (CNT015)
- 2 x 2AWG Black & Red Cable 3ft – (CBL086)
4 Nexus + 2 EG4 12000XP (60kWh – 24kW Power)
- 4 x NEXUS 15.0 kWh Battery – (F-NXUS-48150-G1)
- 2 x EG4 12000XP Off-Grid Inverter – (INV030)
- Parallel BusBar (CNT015)
- 2 x 2AWG Black & Red Cable 3ft – (CBL086)
6 Nexus + 2 EG4 12000XP (90kWh – 24kW Power)
- 6 x NEXUS 15.0 kWh Battery – (F-NXUS-48150-G1)
- 2 x EG4 12000XP Off-Grid Inverter – (INV030)
- 2 x Parallel BusBar – (CNT015)
- 3 x 2AWG Black & Red Cable 3ft – (CBL086)
6 Nexus + 3 EG4 12000XP (90kWh – 24kW Power)
- 6 x NEXUS 15.0 kWh Battery – (F-NXUS-48150-G1)
- 3 x EG4 12000XP Off-Grid Inverter – (INV030)
- 3 x Parallel BusBar – (CNT015)
- 5 x 2AWG Black & Red Cable 3ft – (CBL086)
INTRODUCING THE NEXUS
Sleek & Compact Design
Our stackable, compact design comes with all the hardware you need for a straightforward setup, letting you get your off-grid system up and running efficiently in less time. Engineered for reliability in any off-grid environment, it delivers consistent power when you need it most.
Off-Grid Energy Reliability
With 300Ah of capacity, 100A continuous discharge, and peak support up to 110A, NEXUS handles high-demand loads with ease. NEXUS’s smart thermal management enables charging from 32 °F to 113 °F and discharging down to -4 °F, making it a true all-weather energy solution.
Modular ESS That Grows With You
NEXUS supports parallel expansion up to 15 units, offering 225kWh total capacity per inverter. With RS485, CAN, and RJ45 communication ports, it’s ready to integrate seamlessly into new or existing inverter systems—ensuring full system transparency, automation, and control.
The NEXUS is compatible and parallel-able with all existing KONG and GRIZ products purchased between 2019-2024.
SPECIFICATIONS:
| User Manual |
Click Here |
| Spec Sheet |
Click Here |
| Battery Specifications |
NEXUS 15KWh |
| SKU |
F-NXUS-48143-G1 |
| System Voltage |
48V |
| Nominal Voltage |
51.2V |
| Chemistry |
LiFePO4 |
| Usable Energy (kWh) |
15kWh |
| Ah Capacity |
300Ah |
| Cell Configuration |
16S1P |
| Max Continuous Discharge |
100A |
| Max Discharge Power |
7.6kW |
| Max Discharge Peak |
110A |
| Max Charge Current |
100A |
| 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 |
0°C to 45°C |
| Discharge Temp Range |
-20°C to 45°C |
| Optimal Discharge Temp |
+15°C to +35°C |
| Storage Temp Range (SoC >50%) |
-20°C~25°C |
| Humidity Range |
10%-95% (No Condensation) |
| Weight (kg) |
~142.8 kg ±5 |
| 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 |
IP21 |
| Certifications |
UN38.3 |
| Installation |
Indoor Floor-standing |
| User Manual |
Click Here |
Inverter Specs – EG4 12000XP
AC INPUT & OUTPUT
| Nominal AC Voltage: |
120/240VAC | 120/208VAC (L1/L2/N required) |
| Frequency (Grid | Generator): |
60 Hz (Default) | 50 Hz (Configurable) |
| Max. Continuous AC Current (Grid | Generator): |
100A @ 240VAC | 62.5A @ 240VAC |
| Max. AC Input Power: |
24000W |
| AC Bypass (Grid | Generator): |
100A | 90A |
| Recommended Generator Capacity: |
6000W – 15000W |
| Output Voltage: |
120/240VAC | 208VAC |
| Output Frequency: |
60 Hz (Default) | 50 Hz (Configurable) |
| Max. Continuous Output Current: |
50A @ 240VAC | 57.7A @ 208VAC |
| Nominal Output Power (without PV): |
12000W @ 240V | 12000W @ 208V |
| Nominal Output Power (with PV): |
12000W @ 240V | 12000W @ 208V |
| Max. Continuous Wattage: |
12000W (L1/L2) | 6000W (L1-N/L2-N) |
| Surge Capacity: |
18000W (5 sec) | 15000W (10 sec) |
| Power Factor: |
0.99 |
| Total Harmonic Distortion: |
<3% |
| Switching Time: |
<10 ms (Single) | <20 ms (Parallel) |
PV INPUT
| No. of MPPTs (Inputs per MPPT): |
2 (2) |
| Max. Input Current: |
35A / 35A |
| Max. Short Circuit Input Current: |
44A / 44A |
| DC Input Voltage Range: |
100 – 480VDC |
| Min. Start Up Voltage: |
100VDC |
| MPPT Operating Voltage Range: |
120 – 385VDC |
| Nominal MPPT Voltage: |
320VDC |
| Max. Utilized PV Power: |
24000W (12000W per MPPT) |
| Max. Recommended PV Input: |
28000W (14000W per MPPT) |
| Max. Efficiency: |
99% (MPPT) | 93.5% (PV to Loads) | 92.8% (PV to Battery) | 92.5% (AC to Battery) | 90.2% (Battery to Loads) |
| Idle Consumption (Standby Mode): |
<70W |
OPERATING ENVIRONMENT & DIMENSIONS
| Max. Parallel Connections: |
6 |
| Protection Rating: |
IP20 |
| Communication Interface: |
RS485 / CANBus / WiFi |
| Operating Temperature (Full Load): |
32ºF – 113ºF (0ºC – 45ºC) |
| Storage Temperature: |
5ºF – 140ºF (-15ºC – 60ºC) |
| Altitude: |
<6,561 ft (2000 m) |
| Relative Humidity (Non-Condensing): |
5 – 95% |
| Typical Noise Emission: |
<60 dB |
| Cooling Method: |
Fan |
| Weight: |
104.7 lbs (47.5 kg) |
| Depth: |
5.9 in (150 mm) |
| Width: |
20.9 in (530 mm) |
| Height: |
34.25 in (870 mm) |
