Big Battery | 36kW 92.1kWh ETHOS Energy Storage System (ESS)
36kW 92.1kWh ETHOS Energy Storage System (ESS)
Power Your Business with Confidence using the 36kW 92.1kWh ETHOS Energy Storage System (ESS)—BigBattery’s premier commercial-grade backup and solar energy solution. Engineered for grid-tied commercial applications, this system is ideal for office buildings, warehouses, job sites, or any facility requiring reliable, large-scale power with maximum efficiency and safety.
Certified Commercial ESS for Demanding Energy Needs
The 36kW 92.1kWh ETHOS Energy Storage System (ESS) combines nine cutting-edge ETHOS battery modules with three high-performance 12,000W Lux hybrid inverters, delivering:
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92.1kWh total storage capacity
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36kW continuous inverter output
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Support for up to 54kW of solar PV input
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Built-in UPS for seamless backup transitions
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Smart load control and AC coupling for optimized power usage
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Peak shaving for reduced utility costs
Advanced Safety & Monitoring
This ESS is engineered with mission-critical safety and communication features, including:
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IP65-rated enclosures to protect against dust, water, and environmental damage
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Integrated fire suppression for added protection
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Auto cell-balancing and a sophisticated BMS for consistent battery health
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Real-time monitoring via RS485 and CANBus-compatible LED display
Scalable & Easy to Install
Built for scalability and simplicity:
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Modular and stackable battery modules for future expansion
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Wall-mountable design with all mounting hardware included
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Pre-configured for quick integration with existing solar or grid systems
Whether you’re building a new solar energy system or upgrading your facility’s backup power capabilities, this commercial-grade ESS ensures:
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Lower operating costs
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Reduced reliance on the grid
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Eligibility for tax credits, net metering, and energy efficiency rebates
Why Choose the 36kW 92.1kWh ETHOS ESS?
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Designed for commercial and industrial power systems
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Efficient, scalable, and UL-compliant energy storage
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Seamless solar PV integration with triple MPPT inverters
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Reliable power backup for critical operations
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Available now with fast shipping and technical support from BigBattery
What's Included
18 × 48V ETHOS 5.12kWh Stackable Battery Module
3 × ETHOS Control Box
3 × ETHOS RACK BASE
3 × LUXPower 12kW Hybrid Inverter
6 × Ethos Parallel Power Cable 4.9 ft (1500mm)
1 × Parallel Busbar
3 × Ethos Parallel Comm Cable 4.9 ft (150cm)
Specs and Downloads
Single Stack Tech Specs
| SKU: | K0968 |
| GTIN-12 (U.P.C.): | 850061252043 |
| System Voltage: | 48V |
| Nominal Voltage: | 51.2V |
| Chemistry: | LiFePO4 |
| kWh Capacity: | 15.36kWh |
| Ah Capacity: | 300Ah |
| Charging Voltage Range: | 55.6 - 57V |
| Max Charge Voltage: | 57V |
| Operating Voltage Range: | 48 – 57V |
| Suggested Low Voltage Cutoff: | 48 – 50.8V |
| BMS Cutoff Range: | 42 - 47V |
| Cell Configuration: | 16S 3P |
| Max Continuous Discharge Current: | 250A |
| Max Continuous Power: | 12800W |
| Max Discharge Peak Current: | 300A (Max 5 seconds) |
| Max Charge Current: | 200A |
| Charge Temperature Range: | 32°F - 113°F (0°C - 45°C) |
| Discharge Temperature Range: | -4°F - 140°F (-20°C - 60°C) |
| Optimal Discharge Temperature Range: | 59°F - 95°F (15°C - 35°C) |
| Storage Temperature Range (SoC >50%): | -4°F - 113°F (-20°C - 45°C) (Max 6 months) |
| Weight: | 387 lb (175.5 kg) |
| Depth: | 6.7 in (170 mm) |
| Width: | 26.5 in (674 mm) |
| Height: | 59.8 in (1520 mm) |
| Max Connections: | Up to (16) parallel connections per control box |
| Protection Rating: | IP65 / NEMA 4X |
| Communications: | CANBus / RS485 |
| Certifications: | UL9540, UL9540A, UL1973, & UN38.3 |
Inverter Downloads
Are Solar Guys Pro Authorized Retailers?
Yes! We are proud to be one of the few online retailers who are authorized retailers for every single product we carry!
Being an authorized retailer means we carry the same warranty as the manufacturer, protecting your purchase!
When Will My Order Ship?
Most orders ship within 1–3 business days. You’ll get a tracking number as soon as it ships via email!
Do We Accept Returns?
Yes absolutely, we have a no-hassle, 30-day return policy on all items! To refer to the full policy, click HERE
Are Products Brand New?
Yes! By default, all products on Solar Guys Pro are 100% brand-new and in perfect condition.
If an item is used or refurbished, it will clearly indicate so in the title of the product as well as the discription.
For example, a used Battery will say:
XYZ Battery | 48V 100AH (REFURBISHED)
If you'd like to confirm, you can always send us a email at info@solarguyspro.com
Orders over $500 include a FREE (Normally $149.99) 80-Page DIY Solar eBook — added automatically at checkout.
Frequently Asked Questions
Get your 30% Tax Solar Credit!
Unlock substantial savings with the government's Solar Tax Credit, which offers a robust 30% deduction on the installation costs of solar systems. This attractive incentive is your ticket to leveraging solar energy's eco-friendly potential while enjoying the financial benefits.
At Solar Guys Pro, our commitment is to you. Please be reminded that our expertise does not extend to tax advice. Nonetheless, our dedicated staff is eager to guide you through the process and ensure you capitalize on this exceptional offer.
Contact us now to learn more!