Big Battery | 2x Nexus + 2x EG4 1200XP
BigBattery | 2× NEXUS 48V LiFePO4 Batteries + 2× EG4 12000XP Inverters
Description:
Experience unmatched power, performance, and reliability with the BigBattery 2× NEXUS + 2× EG4 12000XP system. This advanced energy storage and inverter bundle delivers exceptional capacity, efficiency, and scalability—perfect for home backup, solar integration, or off-grid applications. Designed for durability and long-lasting operation, it ensures stable, high-output power for residential and commercial energy needs.
KEY FEATURES
- High-capacity power solution – Combines two NEXUS 48V 14.3kWh LiFePO4 batteries for massive energy storage.
- Powerful dual inverter setup – Includes two EG4 12000XP hybrid inverters offering 12kW continuous power output.
- Advanced battery technology – LiFePO4 chemistry ensures superior safety, cycle life, and energy density.
- Flexible energy integration – Ideal for solar systems, off-grid power setups, or whole-home backup.
- Seamless scalability – Expand your system with additional batteries or inverters as your energy demand grows.
- Smart monitoring and control – Inverters feature built-in Wi-Fi and app-based system management.
- Reliable and efficient operation – Pure sine wave output ensures clean power for sensitive electronics and appliances.
- Long lifespan – Over 4000+ charge cycles for years of dependable use.
Specifications
AC INPUT
| 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 |
AC OUTPUT
| 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 |
BATTERY
| Nominal Voltage: | 48VDC |
| Battery Voltage Range: | 46.4 – 60VDC |
| Max. Charge / Discharge Current: | 250A |
| Max. Charge / Discharge Power: | 12000W |
| DC Cut-Off Voltage: | 59VDC |
| Recommended Battery Capacity per Inverter: | >400Ah |
OPERATING ENVIRONMENT
| 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 |
DIMENSIONS
| 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) |
Manual & Downloads
Are Solar Guys Pro Authorized Retailers?
Yes! We are proud to be one of the few online retailers who are authorized retailers for every single product we carry!
Being an authorized retailer means we carry the same warranty as the manufacturer, protecting your purchase!
When Will My Order Ship?
Most orders ship within 1–3 business days. You’ll get a tracking number as soon as it ships via email!
Do We Accept Returns?
Yes absolutely, we have a no-hassle, 30-day return policy on all items! To refer to the full policy, click HERE
Are Products Brand New?
Yes! By default, all products on Solar Guys Pro are 100% brand-new and in perfect condition.
If an item is used or refurbished, it will clearly indicate so in the title of the product as well as the discription.
For example, a used Battery will say:
XYZ Battery | 48V 100AH (REFURBISHED)
If you'd like to confirm, you can always send us a email at info@solarguyspro.com
Orders over $500 include a FREE (Normally $149.99) 80-Page DIY Solar eBook — added automatically at checkout.
Frequently Asked Questions
Get your 30% Tax Solar Credit!
Unlock substantial savings with the government's Solar Tax Credit, which offers a robust 30% deduction on the installation costs of solar systems. This attractive incentive is your ticket to leveraging solar energy's eco-friendly potential while enjoying the financial benefits.
At Solar Guys Pro, our commitment is to you. Please be reminded that our expertise does not extend to tax advice. Nonetheless, our dedicated staff is eager to guide you through the process and ensure you capitalize on this exceptional offer.
Contact us now to learn more!