Product Overview
The BSLBATT 7kWh 135Ah Rack Battery is a 51.2V LiFePO4 energy storage battery designed for rack-mounted backup power, off-grid, hybrid and grid-tied solar applications. With 135Ah nominal capacity and 6.912kWh nominal energy, it provides a compact modular storage option for residential and commercial systems where compatible inverter and BMS communication has been confirmed.
Key Features
- 6.912kWh nominal energy with 51.2V nominal voltage and 135Ah capacity.
- LiFePO4 battery chemistry for stable, maintenance-free energy storage.
- CAN.Bus and RS485 communication interfaces for supported inverter and energy-management integration.
- Rack-mountable, modular design allows expansion up to 30 units in parallel where system design and compatibility permit.
- Compact steel enclosure measuring 442 x 560 x 177 mm and weighing 58kg.
- Supplier-stated 10-year warranty and designed service life of 15-18 years.
Applications
- Residential backup power systems.
- Off-grid and hybrid solar power systems.
- Grid-tied solar energy storage.
- UPS, telecom and microgrid energy storage applications.
- Rack-based battery banks requiring modular expansion.
Why Choose This Product?
This BSLBATT rack battery combines useful energy capacity with a compact rack format, front-access connections and communication interfaces suited to structured battery installations. It is designed for users and installers who need a modular lithium storage platform that can be expanded as system requirements grow.
Important Notes
- Battery-to-inverter compatibility must be confirmed before installation, including CAN or RS485 communication requirements and approved firmware.
- The supplier notes that mixing this 7kWh battery with the discontinued 6.4kWh model requires a firmware update for communication between the different battery models.
- Installation and commissioning should be completed by a suitably qualified installer.
- The supplier page contains conflicting cycle-life and discharge-current figures in different sections. The technical specification table below uses the values stated in the supplier's “Key Specifications” section. Confirm against the latest manufacturer datasheet before publishing if required.
Technical Specifications
| Specification | Detail |
|---|---|
| Brand | BSLBATT |
| Product Type | Rack-Mount LiFePO4 Battery |
| Nominal Energy | 6.912kWh |
| Nominal Voltage | 51.2V |
| Nominal Capacity | 135Ah |
| Continuous Charge Current | 50A |
| Continuous Discharge Current | 90A |
| Maximum Parallel Expansion | 30 units |
| Communications | CAN.Bus, RS485 |
| Dimensions | 442 x 560 x 177 mm |
| Weight | 58kg |
| Cycle Life | 8,000 cycles at 80% DOD |
| Warranty | 10 years |
| Designed Service Life | 15-18 years |
Important:
All solar products, power systems, water heating and gas products and their components must be installed by appropriately qualified personnel. All installations must adhere to local wiring regulations and standards. Sustainable Online will not be held liable for any product malfunctions as a result of incorrectly installed systems.

