48V/51.2V 100Ah Smart Lithium Iron Phosphate Batteries with Battery Rack

$3,377.85 $2,777.85 Save 18%
 30% Federal Tax Credit

  • High-Quality: Designed with new A+ grade battery cells
  • Integrated Circuit breaker: Safeguards energy system and devices
  • BMS: More than 30 internal protections
  • Certifications: CE, ETL, and UL1973
  • Plug and Play Design: Simply plug in and power up
  • Compatibility: Compatible with major inverter brands and ideal for homes & cabins & sheds
  • Longer lifespan: 95% DOD, 6000 Charge Cycles at 80% DOD
  • Cost Saving: Lifetime cost down to $0.05/kWh
  • Connect in Parallel: Expandable for 76.8kWh of backup power (15P)
  • Two Mount Options: Rack Mount/Wall Mount
Product: 2 Batteries + 2 Battery Racks + 1*2m Extend Cable Kit
Shipping & Returns
  • Ships within 24 hours, delivers within 2-5 days
  • Free Shipping - within 48 contiguous United States
  • Local in stock, available for self-pick-up
  • 30-Day Money Back Guarantee!
Product: 2 Batteries + 2 Battery Racks + 1*2m Extend Cable Kit
Product information

Calpha 51.2V 100Ah Smart Lithium Solar Battery

Battery for solar panels, also known as solar battery storage systems, work by storing the excess energy produced by solar panels during the day. This 51.2V lithium iron phosphate solar system battery has passed rigorous tests and obtained CE, ETL, and UL1973 safety standards, ensuring reliability. Weighing just 41.5kg (91.5lbs), it provides a convenient and portable solution.

Superior Safety with A+ Cells

The Calpha 5.12kWh lithium solar battery for off grid solar systems is designed with new A+ grade battery cells that adhere to industry-leading standards. It does not incorporate recycled materials, ensuring the use of high-quality materials, advanced technology, and reliable energy storage. It ensures significantly higher safety levels compared to ternary lithium batteries due to its inherent chemical stability, uniform cell quality, efficient heat dissipation, and non-flammable electrolytes.

Advanced Battery Management System

Based on 10 years of solar Battery Management System (BMS) expertise and more than 30 internal protections, we have developed this solar battery for off grid solar system. The BMS ensures optimal performance and longevity of your power source by monitoring, protecting, and controlling critical parameters such as voltage, temperature, and current.

15 years Usage Lifespan

With an impressive 6000 cycles at 80% DOD, this solar battery offers twice the longevity of other lithium batteries, making it an excellent choice for solar energy storage for camping trips and home battery backup. Its 15-year lifespan ensures peace of mind and long-term savings. Additionally, the 5-year warranty provides added assurance and protection for your solar battery backup systems.

Connect in Parallel

Maximize the runtime of your off-grid power systems by connecting 15 Calpha 51.2V 100Ah Solar Batteries in parallel, you can get an impressive 76.8 kWh of power. This exceptional scalability empowers you to customize your power needs precisely, whether it's for residential, commercial, or industrial applications.

Smart Monitoring

Calpha 48V(51.2V) 100Ah Lithium Battery seamlessly integrates with a Wi-Fi communication dongle and IoT mobile app, providing real-time access to critical battery information. It supports multiple communication interfaces, including RS485, CAN, and RS232, ensuring compatibility with a wide range of systems. By enabling communication with inverters, our battery enhances safety measures and promotes efficient energy flow.

*Please note that modification to the communication protocol may be required, and you can contact us for further details.

Plug and Play Design

Enjoy the convenience of a seamless setup experience, whether you're a seasoned solar enthusiast or a first-time user. Our user-friendly plug-and-play connector simplifies the process, allowing you to focus on harnessing the power of solar energy rather than getting caught up in intricate installation procedures.

Circuit Breaker

Our battery's integrated circuit breaker promptly responds to excessive currents or faults, ensuring the safety of your energy system and connected devices. With advanced monitoring and automatic interruption features, potential hazards are prevented, allowing uninterrupted operation.

Rack Mount and Wall Mount Options

The Rack Mount option effortlessly integrates into your existing setup, maximizing space efficiency and ensuring a secure installation. Alternatively, our Wall Mount solution offers a space-saving alternative, securely mounting the batteries on any suitable wall surface. Both methods prioritize safety, convenience, and efficient maintenance, empowering you with reliable power solutions tailored to your unique needs.

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Package Includes

51.2V 100Ah Smart LiFePO4 Lithium Iron Phosphate Battery


User Manual



Battery Type: Lithium Iron Phosphate Nominal Voltage: 51.2 V
Operating Voltage Range: 42.0V ~ 57.6V Nominal Capacity: 100 Ah
Depth of Discharge (DOD): 95% Recommended Charge/Discharge Current: 75A
Max. Continuous Charge/Discharge Current: 100A Peak Charge/Discharge Current: 125A (1 sec)
Cycle Life: >6000 cycles, 25°C Electrical Connection: Quick Connector

Expansion / Communication / Protection
Expansion Method: Parallel (Up to 15 units) Communication: RJ45 Port (RS485 / CAN)
Over Current Protection: Circuit Breaker & BMS Soft Switch    

Model: BR51100 Design Life: 15+ Years
Water-proof Rating: IP20 Charge Temperature: 32℉ ~ 140℉ (0℃ ~ 60℃)
Discharge Temperature: -4℉ ~ 140℉ (-20℃ ~ 60℃) Dimensions [W*D*H]: 17.5*15.7*5.1 inches / 445*400*130 mm
Weight: 91.5 lbs/41.5 kg Certifications: CE-EMC / UN38.3 / UL1973 / IEC62619
Warranty: 5-year Material and Workmanship Warranty    

Customer Reviews

Based on 5 reviews
Thomas J. Rich
Best quality good product

This new technology works good and the quality of the battery amazing

Tristan P. McCready
Well built, great performance

Designed for easy and clean installation. Very well constructed and wired. The small monitor did not work after installation so Calpha sent a new one right away and all is well. After several months of two to three rounds per week, the battery and system work perfectly.
Did install myself and consider it an easy project for DIY people.

Charles S. Wright
Straight forward installation.

Removed the old batteries (48v) and charger from golf cart. Replaced with the new calpha kit. Charged and tried out. Direct replacement and works great. Easy to install. More acceleration then original batteries. I have not tested to see the mileage that it will produce. I am a RC flyer that has been working with lithium batteries for some time. The metal encasement is a great safety factor. The added monitor is something that we use with RC planes and cars to understand the condition and safety of the batteries.

Jerry L. Koski
Best purchase made for the Calpha lithium battery

Always working projects to improve performance. This purchase was to go from lol school batteries to lithium. Consistent power, love the monitor, shipped with finesse, and arrived on time. Most definitely one of the best batteries used. Recommend to friends for sure.

Kenneth C. Maxwell
Great price on a solid Li battery

Packaging was excellent. Battery arrived in promised time frame. Installation was straight forward. Will need to come up with brackets or plate for mounting. Some repositioning of existing wiring is needed. If you are not going to mount on board then you will need to purchase a plug for your specific application.