Big Battery 24kW 28.6kWh Rhino 2 Energy Storage System (ESS) - K0715
HIGH-CAPACITY RESIDENTIAL ESS! The second generation of BigBattery’s flagship 48V RHINO has arrived, and the next-gen RHINO 2 is here to revolutionize power storage for every home in America. This 28.68kWh indoor configuration is the ideal solution for grid-tied power in your tiny home, cabin, family home, mansion, or office building, supported by comprehensive safety, reliability, state-of-the-art features, and the highest level of certifications including UL9540, UL9540A, and UL1973.
The RHINO 2 System is built to be a durable, high-capacity home power solution, with a single unit design and a convenient conduit box on top of the unit for effortless cable management and a sleek finished look, with all hardware included to secure the RHINO 2 to your wall with a simple installation. The RHINO 2 comes equipped with an IP65-rated, all-weather casing, as well as an advanced BMS with auto cell-balancing, and a responsive self-heating function to ensure long-lasting safety and reliability even in the harshest of conditions. Plus, the RHINO 2 features an interactive LED display on the side of the unit, along with full CANBus and RS485 communication protocols, so you can always monitor the status and performance of your power. The RHINO 2 even boasts an internal fire extinguishing unit for ultimate peace of mind when installed inside or outside your home. Supported by these robust safety and visibility features, this power system is engineered to withstand up to 8,000 cycles at 80% depth of discharge (DoD), achieving lifespans of up to 10+ years!
But that’s not all. We pair our RHINO 2 with two cutting-edge 12000W Lux inverters, which each feature their own LCD touch screen displays, 3 MPPT inputs, an integrated UPS module for seamless on and off-grid switching, and the ability to handle PV arrays of up to 36000W across both inverters. Plus, through their smart load control, AC coupling abilities, and peak shaving function, you can meet your power needs and protect your home against unstable grids or rolling blackouts, while seeing huge savings each month on your electric bill. But if you already have an inverter at home, don’t worry! The RHINO 2 is compatible with dozens of 48V inverters on the market today.
Whether you’re looking to outfit your home with a powerful solar system or you’re simply looking to ensure emergency backup power is always available, the RHINO 2 ensures reliable, efficient power delivery day in and day out, allowing you to save on utilities, or get rewarded for giving back to the grid through net metering programs and other tax incentives. Take control of your home’s power and shop the all-new 48V RHINO 2 Systems today!
Included
- 2 × 48V RHINO 2 – LiFePO4 – 280Ah – 14.34kWh
- 1 × RHINO 2 Parallel Cable Kit
- 2 × RHINO 2 Conduit Box
- 2 × LUXPower 12kW (18kPV) Hybrid Inverter
What our Experts Think
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Balanced size and output — With ~28.6 kWh storage and 24 kW output capacity, this system offers enough energy for backup power or off‑grid needs while being more compact than large‑scale ESS solutions.
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Strong lithium‑ion performance — LiFePO₄ chemistry with a modern battery‑management system (BMS) ensures stable, deep‑cycle operation and much longer lifespan than conventional lead‑acid banks.
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Reliable for everyday or backup use — Capable of handling typical household loads or modest off‑grid power needs, making it well‑suited for small homes, cabins, or workshops.
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Efficient & maintenance‑free — Low self‑discharge, high round‑trip efficiency, and minimal upkeep make it a practical energy storage choice for residential or small‑scale installations.
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Expandable and versatile — Can integrate with solar arrays, inverters, or backup generators — offering flexibility for future expansion or hybrid energy setups.
Q&A
Q: What is the RHINO 2 24 kW 28.6 kWh ESS (K0715)?
A: A high-capacity residential energy storage system combining two 48 V lithium‑iron‑phosphate (LiFePO₄) battery modules with inverters and all required hardware — designed for home, cabin, or backup power applications.
Q: What does “28.6 kWh” refer to?
A: The total usable energy storage capacity of the battery bank when both modules are used, sufficient for extended off‑grid use or reliable backup power.
Q: What components are included in the kit?
A: Two 48 V RHINO 2 LiFePO₄ battery modules, two hybrid inverters (12 kW each), conduit boxes, a parallel-cable kit — ready for installation as a complete ESS.
Q: What are the key design and safety features?
A: LiFePO₄ chemistry, IP65-rated weatherproof enclosure, advanced Battery Management System (BMS) with auto cell‑balancing, built-in self‑heating, CANBus/RS485 communication, LED status display, and internal fire‑suppression system — engineered for safety and durability.
Q: What kind of power output and inverter support does the system provide?
A: 24 kW AC output (via two 12 kW inverters), support for solar PV input, UPS‑style switching (on/off-grid), and full compatibility with many 48 V inverter/solar setups.
Q: What applications is this ESS best suited for?
A: Residential homes, tiny houses, cabins, offices, off‑grid dwellings, backup power systems, solar + battery storage installations — any setup needing reliable, high-capacity energy storage and backup power.
Q: What are the main advantages over standard lead‑acid or smaller battery setups?
A: Large usable storage capacity, maintenance‑free lithium-based performance, stable voltage output under load, long service life (thousands of cycles), all‑weather, safety‑certified build, and turnkey integration with inverter and wiring for easier installation.
Q: Is installation and integration straightforward?
A: Yes — the system is delivered as a complete kit with batteries, inverters, conduit boxes, and cabling. It’s designed for relatively simple installation and ready to integrate with solar arrays, grid connection, or backup generator systems.
Maintenance Tips
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Install the Rhino 2 ESS in a cool, dry, and well-ventilated area to ensure stable operation and prevent overheating.
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Regularly inspect all wiring, terminals, and connectors for looseness, corrosion, or damage to maintain safe and efficient performance.
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Keep the exterior clean and dust-free using a soft, dry cloth to prevent heat buildup.
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Avoid exposure to direct sunlight, moisture, and extreme temperatures to protect internal components.
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Monitor battery state of charge and avoid deep discharges to preserve long-term capacity and efficiency.
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For long-term storage or inactivity, maintain batteries at 50–60% charge and disconnect from all loads.
