Why Choose the ESP-BU15 for Your Home?
- Scalable Storage for Any Need
The ESP-BU15 can scale from a single battery pack to three, offering up to 15.36 kWh of storage. This makes it an ideal solution for both small homes and large households with higher energy consumption.Â
- Efficiency and Performance
The system is designed to deliver high efficiency, with a 97% round-trip efficiency when paired with compatible battery packs. This ensures minimal energy loss during charging and discharging.Â
- Safety and Compliance
The ESP-BU15 meets stringent industry standards, providing peace of mind with:Â
- Battery Management System (BMS): Comprehensive safety features.Â
- Certifications Pending: UL9540, UL1973, CEC, SGIP.Â
Perfect for Renewable Energy Integration

Grid Backup Power

Solar Integration

Load Management

Warranty
10 Years coverage
Downloads
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The ESP-BU15 Residential Storage Unit from EndurEnergy Systems is a high-capacity, flexible energy storage solution designed for modern homes. With a capacity of up to 15.36 kWh, this system ensures energy independence, peak efficiency, and seamless integration with renewable energy systems like solar panels.Â
Engineered for Superior Performance
ESP-5K HL battery is provided to you with the following technical specifications that are very incredible and that make it different from its rivals:Â
- Voltage Range: Operates between 48V and 57.6VÂ
- Max Continuous Charge/Discharge Rate: 3 kWÂ
- Round Trip Efficiency: 97%Â
- Temperature Resilience: Performs flawlessly in temperatures ranging from -10°C to 55°C
This battery is purposefully built to be effective and reliable in diverse and demanding environments giving guarantee of continuous power for years.Â
Key Features and Benefits
High-Capacity Energy Storage
Designed to support up to three battery packs, the ESP-BU15 delivers a scalable solution for energy storage:Â
- Single Battery Capacity: 5.12 kWhÂ
- Dual Battery Capacity: 10.24 kWhÂ
- Triple Battery Capacity: 15.36 kWhÂ
- Working Voltage Range: 48V – 56VÂ
This adaptability makes it perfect for households with varying energy requirements.Â
Built for Longevity
The ESP-BU15 is built to last with premium materials and industry-leading specifications:Â
- Lifecycle: Up to 6,000 cyclesÂ
- Warranty: Comprehensive 10-year coverageÂ
- Battery Management System (BMS): Ensures safe and optimized performance, protecting against overcharging and overheating.Â
Durable and Compact Design
- Material: Steel with a gray and black powder-coated finishÂ
- Dimensions: 67.5 x 22.9 x 5.7 inches (1714.5 x 581.7 x 144.8 mm)Â
- Weight (Enclosure): 82 lbs (32 kg)Â
- Protection Level: IP55 for excellent resistance against dust and waterÂ
The sleek, durable design is suitable for indoor and outdoor installations, allowing flexibility in placement.Â
Warranty and Support
Specifications at a Glance
Feature | Detail |
Maximum Capacity | Up to 15.36 kWh |
Battery Packs Supported | 3 ESP-5100 or ESP-5K HL |
Working Voltage | 48V – 56V |
Enclosure Weight | 82 lbs (32 kg) |
Dimensions | 67.5 x 22.9 x 5.7 inches |
Protection Level | IP55 |
Certifications | UL9540, UL1973, CEC, SGIP (pending) |
Applications
Residential Power Backup:
Keep your home powered during outages.
Renewable Energy Storage
 Pair with solar panels for sustainable energy use.Â
Energy Cost Management
Store energy during off-peak hours and use it during peak demand to save on electricity bills.Â
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Get Started with ESP-BU15
Are you ready to take control of your home’s energy needs? Â
FAQ’s
How long does the ESP-BU15 last?
With up to 6,000 cycles, the ESP-BU15 is designed to last over 10 years with regular use.Â
Is the unit weatherproof?
Yes, with an IP55 protection rating, the ESP-BU15 is resistant to dust and water, making it suitable for both indoor and outdoor use.Â
Can the system be expanded later?
Absolutely. Start with one battery pack and expand to three as your energy needs grow.Â