The Solar Step
15kWh Luxpowertek Li-15e 51.2V Lithium Battery
15kWh Luxpowertek Li-15e 51.2V Lithium Battery
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Product Description
The Luxpowertek Li-15e is a 15kWh low-voltage lithium battery designed for residential, telecom, hybrid and off-grid energy storage systems.
With a 300Ah capacity at 51.2V, 140A charge and discharge capability, smart BMS protection and flexible mounting options, the Li-15e provides a high-capacity storage solution for larger backup and solar installations.
The battery can be expanded with up to 35 compatible units in parallel without requiring an additional expansion device.
Key Features
15kWh rated energy
300Ah rated capacity
51.2V nominal voltage
LFP battery chemistry
140A charge and discharge current
Up to 35 batteries in parallel
No additional expansion device required
CAN and RS485 communication
Smart BMS protection
Remote firmware upgrades and diagnostics
Original firmware backup
Rack-mounted, wall-mounted or floor-standing installation
Wall-mount brackets included
IP20 protection rating
6,000-cycle stated life
5-year warranty
High-Capacity Energy Storage
The Li-15e provides 15kWh of rated storage from a single 51.2V battery module.
Its 300Ah capacity makes it suitable for systems requiring larger battery storage without installing multiple smaller modules.
140A Charge and Discharge Capability
The battery supports a stated 140A charge and discharge current.
This enables efficient energy transfer when paired with a compatible inverter and correctly designed battery system.
Actual operating current may depend on:
Inverter limits
BMS configuration
Cable sizing
Protection equipment
Operating temperature
Number of batteries connected
Expandable Up to 35 Units
Up to 35 compatible Li-15e batteries can be connected in parallel.
At maximum expansion, this represents up to approximately 525kWh of nominal battery storage.
No additional expansion device is stated as being required.
Flexible Installation
The Li-15e supports multiple installation options:
Wall mounting
Rack mounting
Floor-standing installation
Wall-mounted brackets are supplied with the battery.
Smart BMS Protection
The integrated Battery Management System provides multi-level battery protection, including:
Overcharge protection
Over-discharge protection
Short-circuit protection
The BMS helps maintain safe operation and battery performance when the unit is used within its approved limits.
CAN and RS485 Communication
Communication interfaces include:
CAN
RS485
These allow compatible inverters and battery systems to exchange operating and battery-management information.
Compatibility should be confirmed for the exact inverter model before installation.
Remote Maintenance
The battery supports remote maintenance functions, including:
Remote firmware upgrades
Remote diagnostics
Flexible software updates
Original firmware backup to reduce the risk of failed upgrades
Remote functions may depend on the final system configuration and connectivity.
Technical Specifications
Brand: Luxpowertek
Model: Li-15e
Product type: Low-voltage lithium battery
Cell type: LFP
Rated energy: 15kWh
Rated capacity: 300Ah
Rated voltage: 51.2V
Charge current: 140A
Discharge current: 140A
Stated charge/discharge rate: 0.5C
Maximum parallel units: 35
Communication: CAN / RS485
Protection level: IP20
Dimensions: 706 × 452 × 225mm
Weight: 98kg
Installation: Wall, rack or floor mounted
Remote maintenance: Supported
Cycle life: 6,000 cycles
Warranty: 5 years / 6,000 cycles
Recommended Applications
Residential solar storage
Larger home backup systems
Hybrid solar installations
Off-grid systems
Telecom energy storage
Expandable battery banks
Lead-acid battery replacement applications where compatible
Larger inverter and energy-storage systems
Warranty
Warranty period: 5 years
Warranty terms and conditions may apply
Final warranty coverage may depend on correct installation, operating conditions, inverter compatibility and compliance with the manufacturer’s requirements.
The battery should be installed and commissioned by a qualified professional using correctly sized cables, protection equipment and approved communication settings.
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I recently purchased an inverter from The Solar Step, and I couldn’t be more impressed with the experience. I placed my order on Monday, and it was delivered to Pietermaritzburg by Wednesday—incredible turnaround time!
A special shoutout to Kersh, who kept me updated every step of the way. Her expert product knowledge was top-tier, and she went above and beyond by referring me to a dedicated technician who helped verify the exact battery and inverter compatibility before setup.
Top-notch communication, lightning-fast delivery, and genuine customer care. I highly recommend The Solar Step to anyone looking for reliable solar products and expert advice!
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Order from the page easy,. The delivery was fast as delivery person keep you informed. The indicator installment the next day, easy to install and lights are very clear to from s distance. Thank you for fast respond and delivery and a exalted product
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The staff is very professional and very knowledgeable about their products. The purchase was easy and very quick. I purchased a Lithium battery for my 3 head camera and it's been on ever since especially when there is no sun. I am very happy with my purchase.
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