Description
Store daytime solar energy for evening use with this 29kWh heated LiFePO4 twin battery pack. Two MICROMALL BTL-48V300MH modules combine built-in heating, active balancing and enhanced battery protection in a compact 51.2V system.
Built-in heating for colder installations
Cold conditions can make battery charging more demanding. The integrated heating function helps warm the batteries to support charging in cold conditions. It is a useful feature to consider for solar storage in colder regions or indoor battery spaces that are not kept warm throughout winter.
Each module includes its own heating function. The specified charging temperature range remains 0–55°C, with discharge rated at −20–55°C. Heating operation and charging settings must follow the battery manufacturer's instructions.
Where this pack fits
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Homes in cooler climates. Store solar energy for evening use with built-in heating suited to colder installation conditions.
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Dry indoor garages and battery rooms. Consider the heated version where the installation space gets cold in winter. The IP20 enclosure requires a suitable dry indoor location.
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Off-grid and hybrid solar storage. Suitable for a system designed around compatible 48V-class / 51.2V battery equipment. Confirm the inverter model, communication protocol and settings before installation.
Storage capacity and battery management
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29kWh combined energy and 27.2kWh specified usable energy. Two 280Ah modules provide 560Ah of combined rated capacity at 51.2V.
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Active cell balancing and enhanced protection. Each module includes active equalisation and additional battery safeguards.
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Communication for system integration. CAN2.0 and RS485 support communication with compatible inverters. The modules also include Bluetooth and Wi-Fi.
Low Profile configuration
The 845 mm overall height gives you a shorter stack with the same heated battery capacity. Its 790 × 275 mm footprint matches the Raised Base version, while the overall height is 135 mm lower.
Pack specifications
| Battery modules |
2 × BTL-48V300MH (MSLB-48300MH) |
| Nominal voltage |
51.2V |
| Combined rated capacity |
560Ah (2 × 280Ah) |
| Combined energy |
29kWh (2 × 14.5kWh) |
| Combined usable energy |
27.2kWh (2 × 13.6kWh) |
| Overall dimensions (L × W × H) |
790 × 275 × 845 mm |
| Base configuration |
Low-profile base |
Battery specifications — per module
| Model / chemistry |
BTL-48V300MH / MSLB-48300MH; LiFePO4 |
| Rated capacity |
280Ah |
| Nominal / operating voltage |
51.2V / 43.2–57.6V |
| Energy / usable energy |
14.5kWh / 13.6kWh |
| Recommended / maximum charge-discharge current |
150A / 200A per module |
| Recommended depth of discharge |
90% |
| Cycle life |
≥8,000 cycles at 25°C ±2°C, 0.5C/0.5C, 90% DoD, 70% end of life |
| Enclosure rating |
IP20; for a suitable dry indoor location |
| Charge / discharge temperature |
Charge: 0–55°C (built-in heating included) / Discharge: −20–55°C |
| Communication |
CAN2.0, RS485, Bluetooth and Wi-Fi |
| Module dimensions (L × W × H) |
790 × 275 × 400 mm |
| Module weight |
Approximately 110 ±5 kg per battery module; excludes base and accessories |
Included in the pack
- 2 × BTL-48V300MH heated LiFePO4 battery modules
- 1 × BUSBAR-48V connection set
- Low-profile stack base
Installation
Designed for a suitable dry indoor location (IP20). Confirm inverter compatibility and have a qualified installer check the parallel connection, cabling and protection. Inverter, solar panels and installation are sold separately.
Pack capacity and energy are based on the two module specifications. Current ratings in the module table apply to each battery; total system current and delivered energy depend on the installation and operating conditions.
Warranty
The battery modules come with a 15-year New Zealand local warranty, subject to the applicable warranty terms and energy-throughput limit.
