Rubix Battery 5.12kWh 48 Volt 100 AH Giga Stack Series Lithium RGS-51100

Includes: One 5.12kWh 48V 100 AH (RGS-51100) Stackable Module

For base, lid, and casters bundle, go here. 

Build a scalable and long-life energy storage system with the Rubix GIGA Stack Series RGS-48100, a 48V lithium iron phosphate (LiFePO₄) battery engineered for residential and light-commercial energy storage. Designed as part of Rubix’s modular stack architecture, the RGS-51100 delivers reliable performance, integrated safety, and flexible expansion for modern inverter-based power systems.

Key Technology

• 5.12kWh Usable Energy Capacity
  100Ah at 48V nominal provides dependable daily energy storage for solar self-consumption and backup applications.

• LiFePO₄ Battery Chemistry
  Prismatic lithium iron phosphate cells offer enhanced thermal stability, long service life, and improved safety compared to traditional lithium chemistries.

• Integrated Battery Management System (BMS)
  Built-in protection against over-voltage, under-voltage, over-current, and temperature extremes ensures safe and consistent operation.

• Modular GIGA Stack Design
  Supports up to 6 batteries per stack, allowing capacity to grow over time without replacing existing equipment.

Best Uses

• Residential Solar Energy Storage
  Ideal for pairing with 48V hybrid and off-grid inverters for daily cycling and backup power.

• Backup Power Systems
  Provides reliable stored energy during grid outages when configured with compatible inverter equipment.

• Modular Energy Expansion
  Perfect for users who want to start small and add battery capacity as energy demands increase.

• Indoor Energy Storage Installations
  Designed for indoor use with IP50 protection and no active ventilation requirements.

Safety & Monitoring

• Integrated 125A circuit breaker and 500A fuse

• Pressure-vented cells for enhanced safety

• Touchscreen LCD displaying SOC, voltage, current, cell voltages, balancer status, and fault alerts

Warranty & Certifications

• Cycle Life: 4,000 cycles @ 100% DoD / 6,000 cycles @ 80% DoD / 8,500 cycles @ 50% DoD

• Battery Certification: UL9540A

• Transport Certification: UN38.3

Product Specifications

Rubix Battery is a U.S.-based solar energy storage company that designs and manufactures premium lithium (LiFePO₄) battery systems for residential, commercial, and off-grid use. Formed from the merger of MillerTech and ARK Battery, Rubix focuses on scalable, stackable batteries with long cycle life, advanced management systems, and strong warranties to support reliable solar power storage.

Scalable 48V Storage Built for Long-Term Reliability

The Rubix RGS-48100 delivers dependable lithium storage in a modular, stackable platform. With long cycle life, integrated safety features, and compatibility with modern inverter systems, it’s a future-ready solution for solar-plus-storage applications.

Why Buy From US Solar Supplier

US Solar Supplier is an American-founded company based in Kentucky dedicated to offering top-quality solar components from trusted manufacturers. We provide competitive pricing, dependable inventory, and products backed by warranties you can trust.

Our inventory is updated daily with the latest solar technologies, and our experienced team is ready to assist with product selection, system design, and installation guidance.

Need Assistance?

Have questions before you order? Call 1-800-230-7004 to speak with our knowledgeable support team. We’re here to help with product details, compatibility questions, or purchasing support.