Big Battery | 36kW 46kWh ETHOS Energy Storage System (ESS)
36kW 46kWh ETHOS Energy Storage System (ESS)
Power Your Business with Confidence — The 36kW 46kWh ETHOS Energy Storage System (ESS) from BigBattery delivers cutting-edge commercial energy storage engineered for reliability, scalability, and long-term performance. Perfect for grid-tied applications in office buildings, warehouses, and job sites, this system combines industrial-grade hardware with advanced energy management features to help you save money, improve energy independence, and maintain uninterrupted operations.
Built for Commercial Performance
This high-capacity ESS includes:
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Six stackable ETHOS battery modules providing 46.08kWh of scalable storage
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Three 12,000W Lux hybrid inverters, delivering a total of 36kW continuous power
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Compatibility with solar PV arrays up to 54,000W
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Integrated UPS backup for smooth transitions during outages
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Smart load control, peak shaving, and AC coupling for optimized energy usage
Durable, Safe & Easy to Install
The 36kW 46kWh ETHOS Energy Storage System (ESS) is engineered for safety and ease of use:
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IP65-rated enclosures ensure weather and dust resistance
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Internal fire suppression system for enhanced safety
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Advanced Battery Management System (BMS) with auto cell balancing
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Wall-mountable modular design for space-saving installation
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LED display with CANBus and RS485 for real-time performance monitoring
Scalable and Intelligent Energy Solution
Whether you’re managing energy costs or preparing for power disruptions, ETHOS helps your business:
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Reduce energy bills by avoiding peak demand charges
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Remain operational during blackouts with seamless UPS support
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Benefit from net metering programs and renewable energy tax incentives
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Expand energy storage capacity easily as your power needs grow
Why Choose the 36kW 46kWh ETHOS ESS?
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Commercial-grade, certified solution for grid-tied solar + backup
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Designed for seamless integration with existing infrastructure
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Smart inverter features help optimize system performance
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Ideal for medium-to-large commercial setups
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Backed by BigBattery’s reputation for reliability and innovation
Empower your operations with the 36kW 46kWh ETHOS Energy Storage System (ESS) — the smart, scalable solution for clean energy storage, backup power, and long-term utility savings.
What's Included
9 × 48V ETHOS 5.12kWh Stackable Battery Module
3 × ETHOS Control Box
3 × LUXPower 12kW Hybrid Inverter
3 × 15kWh Ethos Controller to Battery Power Cable 4ft (1220mm)
1 × Parallel Busbar
Specs and Downloads
System Spec Sheet
Inverter Spec Sheet
Single Stack Tech Specs
| SKU: | K0966 |
| GTIN-12 (U.P.C.): | 850061252050 |
| 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
Registration & WiFi Setup Guide
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
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