Rubix Stack Series RS25200 5.12kWh 200Ah 24V LiFePO4 Battery

The Rubix Stack Series RS25200 is a 24V LiFePO4 battery delivering 5.12kWh of usable capacity in a modular, stackable enclosure built for residential and light commercial energy storage systems. Constructed around prismatic lithium iron phosphate cells with an integrated BMS and touchscreen LCD, the RS25200 offers a solar battery storage platform that scales from a single 5.12kWh module up to a 163.84kWh bank of 32 units — without changing inverters or adding separate enclosures.

Key specifications

• Energy capacity: 5.12kWh (25.6V nominal / 200Ah); max recommended discharge to 25.5V (20% SOC)
• Cycle life: 4,500 cycles at 100% DOD; 6,000 at 80% DOD; up to 8,000 at 50% DOD — 80% capacity retained at end of rated life
• Scalability: up to 6 units per stack; expandable to 32 parallel batteries for 163.84kWh total system capacity
• Continuous discharge: 180A (4.6kW); 400A peak for 3 seconds; 140A max continuous charge rate
• Certification: CELLS-1973; UN 38.3 transport certified

LiFePO4 chemistry outlasts lead acid

Lead acid and standard lithium-ion alternatives can't match what LiFePO4 (lithium iron phosphate) chemistry delivers to a home energy storage install: up to 8,000 rated cycles at 50% depth of discharge before capacity drops below 80%. For a daily-cycling residential ESS, that translates to decades of useful service without the corrosion, off-gassing, or watering schedules tied to flooded lead acid. Prismatic cells with welded busbar connections reinforce pack consistency across the RS25200's full service life.

Key Applications

• Residential solar backup: Pairs with a 24V hybrid inverter to store daytime solar generation and power critical loads through the night or during grid outages.
• Scalable home ESS: Start with one 5.12kWh unit and expand capacity to 163.84kWh as energy demands grow — existing batteries remain in service throughout.
• Off-grid cabins and remote properties: The stackable form factor concentrates a large LiFePO4 deep cycle battery bank in a compact indoor footprint with no additional racking required.
• Light commercial backup power: Supports 4.6kW continuous discharge and 10.2kW peak surge capacity, suitable for small business backup applications.
• Emergency preparedness: Sized to carry essential household loads — refrigeration, lighting, communications — through extended outages when paired with solar or AC charging.

Touchscreen LCD and multi-layer BMS protection

• Touchscreen LCD displays state of charge, pack voltage, charge/discharge current, individual cell voltages, fault log, and inverter communication selection — no external monitoring device needed.
• Low voltage protection: BMS low voltage disconnect activates at 20.5V (±1V) to prevent deep discharge damage; inverter low battery cutout is set at 24V.
• Thermal safeguards: Charging halts at or below 32°F (0°C); discharging halts below 0°F (-17.8°C); BMS disconnects above 135°F (57.2°C).
• Impactive cell balancing at up to 1.1A actively equalizes individual cell voltages to preserve long-term capacity and prevent premature degradation.
• Rapid Shut Down (RPSD) and pressure-vented prismatic cells support residential installation safety compliance.

Inverter and system compatibility

The RS25200 is designed for 24V inverter systems using a LiFePO4 charging profile: recommended absorb voltage 28.4V (28.8V max for solar-only systems), float at 27.2V, absorb done threshold at 5A per battery over a 10-minute absorb done period. Inverter communication protocol is selected directly from the touchscreen LCD. The battery must be installed horizontally using the included base unit indoors only — IP50 rated, not suitable for outdoor installation. Required clearances: 3 in. from walls, 4 in. between parallel stacks, 6 in. between the top of the stack and wall-mounted solar equipment, and 4 ft. from any water source or conductor. Maximum 6 batteries per stack; up to 32 units in parallel.

Why choose the Rubix Stack Series RS25200?

The Rubix Stack Series RS25200 distinguishes itself among 24V battery bank options by pairing genuine scalability with a cycle life that pencils out over the long term. Eight thousand rated cycles, a built-in touchscreen that eliminates the need for a separate BMS monitor, RPSD compliance, and CELLS-1973 certification make it a well-documented choice for permitted residential and light commercial installs. A buyer starting with a single unit today is already building toward a 163.84kWh system tomorrow — using the same hardware.