Big Battery | 24kW | 30.7kWh | ETHOS Energy Storage System (ESS)
24kW | 30.7kWh | ETHOS Energy Storage System (ESS)
Next-Level Solar Energy Storage for Homes, Cabins & Large Estates
Power your home with confidence using the BigBattery 48V ETHOS 30.7kWh Energy Storage System (ESS)—a robust outdoor energy solution engineered for residential applications. Whether you live in a modern family home, a spacious estate, or a remote cabin, this system delivers the scalable energy storage and grid-tied performance you need.
Built to meet the demands of high energy usage, this ETHOS configuration features 24kW of output power and 30.7kWh of battery storage, offering reliable backup and peak efficiency for solar power systems year-round.
Engineered for Flexibility and Endurance
The ETHOS system is designed to grow with your needs. Its modular, stackable design and IP65-rated outdoor casing make it perfect for flexible installations on exterior walls, garages, or sheds.
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Durable & Weather-Resistant: IP65-rated with integrated fire suppression
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Smart Safety Management: Advanced BMS with auto cell-balancing for optimal health and longevity
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Easy Installation: Includes all required mounting hardware for fast setup
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Expandable Capacity: Modular design allows future scalability
Intelligent System Monitoring & Communications
With built-in LED displays and real-time data communication protocols, the ETHOS gives you clear insight into system performance:
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LED Display Interface: View key performance metrics at a glance
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Integrated CANBus & RS485: Enables smart communication with other energy systems
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Advanced BMS (Battery Management System): Maintains long-term battery health and efficiency
Dual 12000W Lux Inverters for Complete Power Control
This system includes two high-performance 12kW Lux inverters, each offering intelligent energy management capabilities to optimize your solar production and backup readiness:
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LCD Touchscreens: User-friendly control and monitoring
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Three MPPT Inputs Per Inverter: Maximizes solar input from multiple arrays
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Integrated UPS Modules: Seamless on/off-grid power transition
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36000W Solar Input Capacity: Supports large-scale solar systems
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Smart Load Control, AC Coupling & Peak Shaving: Designed for efficiency, protection, and cost savings
Key Features at a Glance:
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30.7kWh Outdoor Battery Storage – Built for heavy residential energy demands
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24kW Output with Dual Lux Inverters – Power large appliances, EVs, HVACs, and whole-home loads
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Smart Energy Management – Advanced inverter features to lower your monthly utility bills
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Tax Incentive Ready – Eligible for federal solar tax credits and net metering programs
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Expandable & Future-Proof – Modular system scales with your energy needs
Upgrade to the 48V ETHOS Today
The 24kW | 30.7kWh ETHOS Energy Storage System (ESS) redefines residential solar storage. Backed by BigBattery’s industry-leading innovation, this system empowers homeowners to take full control of their energy—whether for daily usage, emergency backup, or maximizing solar return on investment.
Experience the reliability, efficiency, and independence of a smart energy future with ETHOS.
What's Included
6 × 48V ETHOS 5.12kWh Stackable Battery Module
2 × ETHOS Control Box
2 × LUXPower 12kW Hybrid Inverter
2 × 15kWh Ethos Controller to Battery Power Cable 4ft (1220mm)
1 × Parallel Busbar
Specs and Downloads
| SKU: | K0959 |
| GTIN-12 (U.P.C.): | 850061252142 |
| 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 |
User Manual
UL9540 Certification
UL1973 Certification
Safety Data Sheet
Inverter
User Manual
Rapid ShutDown Certificate
UL1741 Certificate
IEEE1547 Certificate
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!