Big Battery 36kW 30.7kWh ETHOS Energy Storage System (ESS) - K0965
CERTIFIED COMMERCIAL ESS! BigBattery’s 48V ETHOS systems are here, and this 30kWh commercial configuration is the ideal solution for grid-tied power in your office building, warehouse, or job site, supported by comprehensive safety, reliability, and state-of-the-art features.
The ETHOS System was built to be a versatile commercial power solution, with a stackable, modular design for easy expandability, and all hardware included to wall-mount your ETHOS with an effortless installation. The ETHOS comes equipped with an IP65-rated casing, an internal fire suppression system, as well as an advanced BMS with auto cell-balancing to ensure long-lasting safety and reliability. Plus, its control box features an interactive LED display, along with CANBus and RS485 communication protocols, so you can always monitor the status and performance of your power.
But that’s not all. We pair this ETHOS system with 3 cutting-edge 12000W Lux inverters, which feature their own LCD touch screen displays, 3 MPPT inputs each, integrated UPS modules for seamless on and off-grid switching, and the ability to handle PV arrays of up to 54000W. Plus, through their smart load control, AC coupling abilities, and peak shaving functions, you can meet your power needs and protect your business against unstable grids or rolling blackouts, while seeing huge savings each month on your electric bill.
Whether you’re looking to ensure emergency backup power is always available, or you’re looking to outfit your office building with a powerful solar system, the ETHOS 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 business’s power and shop the 48V ETHOS today!
Included
- 6 × 48V ETHOS 5.12kWh Stackable Battery Module
- 3 × ETHOS Control Box
- 3 × LUXPower 12kW (18kPV) Hybrid Inverter
- 3 × 10kWh Ethos Controller to Battery Power Cable 31.5" inch (800mm)
What our Experts Think
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Balanced capacity & power output — 30.7 kWh storage with 36 kW inverter provides enough energy for full-home loads or small commercial applications, with sufficient surge capacity for heavy appliances or tools.
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Modular and expandable design — Stackable battery modules with hybrid inverters allow easy scaling as energy needs grow, keeping installation straightforward.
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Efficient, long-lasting lithium chemistry — LiFePO₄ cells with a smart BMS and auto cell-balancing offer deep-cycle durability, high efficiency, and longer lifespan compared to lead-acid alternatives.
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Safety, reliability & compliance — Features integrated protections and an IP-rated enclosure for secure operation in residential or commercial environments.
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Versatile applications — Suitable for off-grid homes, solar-plus-storage systems, emergency backup, or grid-tied installations needing load-shifting, peak shaving, or full-home energy independence.
Q&A
Q: What is the BigBattery 36 kW 30.7 kWh ETHOS ESS (K0965)?
A: A modular 48 V LiFePO₄ energy storage system with multiple ETHOS battery modules, inverters, and a controller — designed for whole-home, off-grid, commercial, or backup power applications.
Q: What does “30.7 kWh” represent?
A: The total usable energy capacity of the combined ETHOS battery modules, suitable for extended energy storage or backup power needs.
Q: What are the key design and safety features?
A: LiFePO₄ chemistry, stackable/modular design for expandability, IP65-rated weather-resistant enclosure, advanced BMS with auto cell-balancing, control box with LED display, and CANBus/RS485 communications.
Q: What inverter and power output capabilities are included?
A: Three 12 kW hybrid inverters providing a combined 36 kW AC output for household or small commercial loads.
Q: What applications is this system best for?
A: Residential homes, cabins, tiny homes, off-grid dwellings, commercial offices or worksites, and other setups needing robust backup, off-grid, or solar + storage power.
Q: What are the main advantages over simpler battery or lead-acid systems?
A: Large usable storage, maintenance-free lithium performance, long lifespan, stable and efficient power delivery, safety-certified, modular expandability, all-weather design, and turnkey integration with inverters/controllers.
Q: Is installation and integration straightforward?
A: Yes, the ESS comes as a complete kit with battery modules, control box, inverters, and cabling, designed for easy setup with solar arrays, grid, or backup generators.
Maintenance Tips
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Install the ETHOS ESS in a cool, dry, and well-ventilated area to ensure optimal performance and prevent overheating.
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Regularly inspect all wiring, terminals, and connectors for looseness, corrosion, or damage to maintain safe and efficient operation.
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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 periods of non-use, maintain batteries at 50–60% charge and disconnect from all loads.
