The BigBattery NEXUS 2 is a high-capacity 51.2V 16kWh LiFePO4 energy storage system engineered for dependable home backup and off-grid performance. Featuring a durable floor-standing design with built-in self-heating and integrated aerosol fire suppression, this unit delivers robust operation in demanding conditions.
Equipped with 314Ah capacity, multi-layer BMS protection, and flexible parallel expansion up to 15 units, it provides scalable, uninterrupted power for cabins, sheds, and whole-home setups.
Key Features
| Brand | BigBattery |
| Model | NEXUS 2 |
| SKU | F-NXUS2-48161-G1 |
| GTIN/UPC | 00199874694771 |
| Chemistry | LiFePO4 |
| Nominal Voltage | 51.2V |
| System Voltage | 48V |
| Capacity | 314Ah |
| Usable Energy | 16.08kWh |
| Cell Configuration | 16S1P |
| Max Continuous Discharge Current | 150A |
| 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 Temperature Range | 32°F to 113°F |
| Discharge Temperature Range | -4°F to 113°F |
| Optimal Discharge Temperature | 59°F to 95°F |
| Humidity Range | 10%–95% (No Condensation) |
| Max Connections | 15 in parallel (up to 225kWh) |
| Communications | RS485 / RJ45 / CAN |
| Protection Rating | IP54 |
| Installation | Indoor Floor-standing |
| Dimensions (W x H x D) | 19.7 x 27.5 x 15.7 in |
| Weight | 315 lbs |
Highlights
- 16kWh LiFePO₄ Battery Module – Safe, high-capacity lithium storage with long lifespan
- 8,000+ Cycle Life – Built for years of daily use and long-term savings
- Advanced BMS Protection – Multi-layer protection against voltage, current, and temperature risks
- Self-Heating Function – Reliable performance in cold climates
- Integrated Thermal Suppression – Built-in aerosol system for enhanced safety
- Modular Expansion – Scale from 16kWh up to 241kWh as needed
- Compact Floor-Standing Design – Easy placement without wall mounting
- Maintenance-Free Operation – No routine servicing required
Compatibility
Communication of Inverters list (Off Grid Non-UL 9540 Installs)
- APEX Inverters
- EG4
- GoodWe
- Solis
- Deye
- PYLON
- Victron
Warranty
Batteries are backed by a 12-year manufacturer's warranty, providing long-term performance. Designed for durability and engineered to last, the batteries are built to power setups for over a decade.
Downloads
Frequently asked questions
|
The BigBattery NEXUS 2 is a high-capacity 51.2V 16kWh LiFePO4 energy storage system engineered for dependable home backup and off-grid performance. Featuring a durable floor-standing design with built-in self-heating and integrated aerosol fire suppression, this unit delivers robust operation in demanding conditions.
Equipped with 314Ah capacity, multi-layer BMS protection, and flexible parallel expansion up to 15 units, it provides scalable, uninterrupted power for cabins, sheds, and whole-home setups.
Key Features
| Brand | BigBattery |
| Model | NEXUS 2 |
| SKU | F-NXUS2-48161-G1 |
| GTIN/UPC | 00199874694771 |
| Chemistry | LiFePO4 |
| Nominal Voltage | 51.2V |
| System Voltage | 48V |
| Capacity | 314Ah |
| Usable Energy | 16.08kWh |
| Cell Configuration | 16S1P |
| Max Continuous Discharge Current | 150A |
| 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 Temperature Range | 32°F to 113°F |
| Discharge Temperature Range | -4°F to 113°F |
| Optimal Discharge Temperature | 59°F to 95°F |
| Humidity Range | 10%–95% (No Condensation) |
| Max Connections | 15 in parallel (up to 225kWh) |
| Communications | RS485 / RJ45 / CAN |
| Protection Rating | IP54 |
| Installation | Indoor Floor-standing |
| Dimensions (W x H x D) | 19.7 x 27.5 x 15.7 in |
| Weight | 315 lbs |
Highlights
- 16kWh LiFePO₄ Battery Module – Safe, high-capacity lithium storage with long lifespan
- 8,000+ Cycle Life – Built for years of daily use and long-term savings
- Advanced BMS Protection – Multi-layer protection against voltage, current, and temperature risks
- Self-Heating Function – Reliable performance in cold climates
- Integrated Thermal Suppression – Built-in aerosol system for enhanced safety
- Modular Expansion – Scale from 16kWh up to 241kWh as needed
- Compact Floor-Standing Design – Easy placement without wall mounting
- Maintenance-Free Operation – No routine servicing required
Compatibility
Communication of Inverters list (Off Grid Non-UL 9540 Installs)
- APEX Inverters
- EG4
- GoodWe
- Solis
- Deye
- PYLON
- Victron
Warranty
Batteries are backed by a 12-year manufacturer's warranty, providing long-term performance. Designed for durability and engineered to last, the batteries are built to power setups for over a decade.
Downloads
Frequently asked questions
|
BigBattery NEXUS 2 51.2V 16kWh LiFePO4 Battery
- Regular price
- $2,990.00
- Sale price
- $2,990.00
- Regular price
-
No obligation — get a custom quote in minutes
Lifetime Support on Every Order, Guaranteed.
BigBattery NEXUS 2 51.2V 16kWh LiFePO4 Battery
Testimonials
3,000+ Customer Reviews & Counting
Join the thousands of people who have already secured their energy independence.
"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
"The whole process was seamless. From ordering to installation, everything was straightforward. Our electricity bill has dropped significantly!"
"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
"We compared prices everywhere and this was by far the best deal. The quality of the panels is top-notch and installation guidance was superb."
"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
"The whole process was seamless. From ordering to installation, everything was straightforward. Our electricity bill has dropped significantly!"
"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
"We compared prices everywhere and this was by far the best deal. The quality of the panels is top-notch and installation guidance was superb."
"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
Order With Confidence
Frequently Asked Questions
Find the answers to some of the most common questions customers have before placing their order.
Yes. Our team can help you choose the right solar kit based on your goals, power needs, and location. We provide personalized guidance before and after your purchase at no additional cost.
Many of our customers complete the majority of installation themselves using our diagrams and support resources. For final electrical connections, a licensed electrician may be required depending on local codes.
While we do not directly install systems, we can help connect you with qualified local professionals and provide technical documentation to support your installer.
Our return policy is normally 30 days. If you have specific questions about returns, eligibility, or specific product conditions, you can learn more in our help center linked below.
All products are backed by full manufacturer warranties. In addition, our team provides free lifetime technical support to assist you throughout the life of your system.
Yes! We offer a variety of flexible payment plans to fit any budget. Options include monthly financing with competitive interest rates, and some plans require no money down. You can apply during checkout and get approved in minutes.
If you're ready to place your order, you can go ahead and checkout online right now. If you have questions, our friendly team of solar experts are happy to assist and can take your order over the phone. If you're interested in financing, you will find the application at checkout online. So whatever is best for you, we are happy to accommodate.
Our team works hard to process all orders within 24-48 hours. Most products ship directly to your door using the quickest, most cost effective ground shipping services depending on size. You’ll receive tracking details and delivery coordination as soon as your order ships. Our average shipping times are anywhere from 3-7 days.
You’ll have free direct access to our support team via phone, email, and chat. Whether it’s setup guidance or troubleshooting years down the road, we’re here to help.
Flexible Payment Options
Buy Now, Pay Later
We offer a wide variety of payment plan options to meet each customer's needs.
Quick & Easy Application
Fill out a short application and we'll match you with multiple payment plan options instantly.
Poor Credit or No Credit?
Don't sweat it. We welcome all credit scores and a credit score is not required for approval.
No Money Down Today
Some payment plans offer as little as no money down, if you qualify.*