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LFEM-50-100
sanhe
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Model: LFEM-50-100-A / LFEM-50-100-B
Installation: Outdoor
Brand: Sanhe / LFEI
The LFEM-50-100 is an air-cooled PV and energy storage microgrid cabinet designed for small commercial, industrial, and remote off-grid applications. It integrates MPPT solar charge controllers, PCS, battery system, and microgrid control into a single outdoor-rated cabinet.
The system supports DC-coupled PV input, grid-connected and off-grid operation, and millisecond-level on/off-grid switching. With built-in grid-forming capability, it can operate as an independent microgrid power source when the main grid is unavailable. It is ideal for remote villages, farms, small factories, telecom base stations, and emergency power supply applications.
Two battery capacity options are available: 96kWh (LFEM-50-100-A) and 112kWh (LFEM-50-100-B) .
Intelligent Management
Cloud-edge collaborative control, enhanced by AI intelligent algorithms
Remote monitoring and management, OTA upgrade, intelligent operation and maintenance
Automatic optimization strategy, maximization of economic benefits
Multi-Dimensional Security
First-tier A-grade battery cells, core-level safety guarantee
Active/passive fire protection design, safe and reliable operation
Early warning of cell-level faults and proactive elimination of potential safety hazards
Microgrid Architecture
Highly integrated, DC-coupled PV+ESS architecture
Multi-source access: wind, solar, diesel, storage, and EV charging
Grid-forming, on/off-grid operation with millisecond-level transfer
Quick Commissioning
All-in-one design, fast installation and deployment
Modular design, integration/maintenance more efficient
Multiple cabinets operating in parallel, flexible capacity expansion, MW-level scalability
| Parameter | LFEM-50-100-A | LFEM-50-100-B |
|---|---|---|
| Product Model | LFEM-50-100-A | LFEM-50-100-B |
| PV Input | ||
| Max. PV Input Voltage (V) | 1000 | 1000 |
| Max. PV Power (kW) | 96 | 96 |
| MPPT Operating Voltage Range (V) | 150–850 | 150–850 |
| MPPT Quantity / Max. String Count | 4/8 | 4/8 |
| Battery Parameters | ||
| Battery Specification (Ah) | LFP314 | LFP314 |
| Cluster Configuration | 1P965 | 1P965 |
| Rated Voltage (V) | 307.2 | 358.4 |
| Voltage Range (V) | 268.8–345.6 | 313.6–403.2 |
| Rated Energy (kWh) | 96 | 112 |
| Cooling Method | Smart Air Cooling | Smart Air Cooling |
| AC Parameters | ||
| Rated AC Power (kW) | 50 | 50 |
| Rated AC Current (A) | 72.2 | 72.2 |
| Rated AC Voltage (V) | 400 | 400 |
| AC Connection | Three-phase four-wire | Three-phase four-wire |
| Rated AC Frequency (Hz) | 50/60 | 50/60 |
| THDi | <3% | <3% |
| Power Factor | 0.8 leading–0.8 lagging | 0.8 leading–0.8 lagging |
| THDu | <3% @ linear load | <3% @ linear load |
| System Specifications | ||
| IP Rating | IP55 | IP55 |
| Operating Temperature (°C) | -25–60 (derating above 45) | -25–60 (derating above 45) |
| Altitude (m) | 2000 | 2000 |
| Noise (dB) | <75 | <75 |
| Communication Interface | RS485, Ethernet | RS485, Ethernet |
| Fire Protection | Pack-Level + Cabinet-Level Water Suppression | Pack-Level + Cabinet-Level Water Suppression |
| Communication Protocol | Modbus RTU/TCP | Modbus RTU/TCP |
| Dimensions (W×D×H) (mm) | 1300×1390×2200 | 1300×1390×2200 |
| Weight (t) | 2 | 2 |
| Certification | Status |
|---|---|
| UN 38.3 (Transport Safety) | ✅ Certified |
| CE | ✅ Certified |
| IEC 62619 (Battery Safety) | ✅ Certified |
| IEC 62477 (PCS Safety) | ✅ Certified |
Note: Certification documents can be provided upon request. Additional certifications can be arranged based on project requirements.
| Application | Description |
|---|---|
| Remote Village Off-Grid Power | Independent power supply for areas without reliable grid access |
| Farm / Agricultural Facility | Solar-storage systems for high-power farm equipment |
| Small Factory PV-Storage | Grid-connected or off-grid storage for small industrial loads |
| Telecom Base Station Backup | Reliable backup power for communication infrastructure |
| Emergency Power Supply | Rapid deployment for disaster relief and temporary sites |
The LFEM-50-100 supports:
DC coupling for solar PV integration (4 MPPT channels, max 96kW PV)
Grid-connected operation with PV self-consumption and battery storage
Off-grid / island operation with grid-forming capability
Millisecond-level on/off-grid switching
Multi-source access: PV, diesel generator, storage, and EV charging
Parallel expansion with multiple cabinets for MW-level capacity
A: The two models share the same power rating (50kW), same PV input capability (96kW, 4 MPPT), same dimensions, and same features. The only difference is battery energy capacity:
| Feature | LFEM-50-100-A | LFEM-50-100-B |
|---|---|---|
| Rated Energy | 96kWh | 112kWh |
| Rated Voltage | 307.2V | 358.4V |
| Voltage Range | 268.8–345.6V | 313.6–403.2V |
Choose the B model if you need longer backup duration or more daily energy throughput.
A: The LFEM-50-100 is primarily a DC-coupled system with 4 MPPT channels for direct PV connection. It also supports AC coupling for grid-tied applications. This dual capability allows flexible integration with both new PV installations and existing AC-coupled systems.
A: The LFEM-50-100 is an all-in-one, pre-assembled cabinet. On-site installation typically takes 1 day for placement, PV connection, cabling, and electrical connection. Commissioning and testing usually require an additional 1 day.
A: Yes. The LFEM-50-100 supports parallel operation with multiple cabinets of the same model. You can start with one unit and add more as your power demand or PV capacity grows, achieving MW-level microgrid capacity.
A: The system uses smart air cooling with variable-speed fans controlled by battery and inverter temperature sensors. The cabinet is rated IP55 for dust and water resistance. Operating temperature range is -25°C to 60°C, with derating above 45°C to protect components. For extreme heat (above 50°C continuous), we recommend evaluating our liquid-cooled models.
A: The system supports Modbus RTU (via RS485) and Modbus TCP (via Ethernet). It can be integrated with SCADA, EMS, or building management systems. Our cloud platform also provides remote monitoring and data visualization.
A: The system incorporates multi-level fire protection:
Pack level: Each battery pack has its own fire suppression module
Cabinet level: Water spray fire protection for the entire enclosure
AI prediction: Continuous monitoring of voltage, temperature, and current to predict and alert potential faults
A: The LFP314 cells are rated for 6,000 cycles at 25°C, 0.5C charge/discharge rate, 90% DoD, and 70% EOL capacity retention. Under daily cycling, this translates to approximately 15–16 years of useful life.
A: Payback period depends on local electricity rates, load profile, and available incentives. Typical payback for commercial and off-grid applications is 3–5 years. We provide a free ROI simulation based on your site data.
A: The LFEM-50-100 connects directly to 400V low-voltage grids. For medium-voltage connection (e.g., 10kV, 35kV), an external step-up transformer is required. We can provide or recommend suitable transformers based on your project requirements.
A: Yes. Our cloud-edge collaborative platform provides real-time monitoring, remote control, OTA upgrades, and predictive maintenance alerts. Our engineering team provides 24/7 remote support for all installed systems.
A: The main differences are power, capacity, PV input, and cooling method:
| Feature | LFEM-50-100 | LFEM-125-261-E1 |
|---|---|---|
| Rated Power | 50kW | 125kW |
| Rated Energy | 96/112kWh | 261kWh |
| PV Input | 96kW, 4 MPPT | 150kW, 3 MPPT |
| Cooling | Air-cooled | Liquid-cooled |
| Application | Small C&I, remote off-grid | Larger microgrid, C&I |
Choose LFEM-50-100 for smaller loads and budget-sensitive projects. Choose LFEM-125-261-E1 for larger power and energy requirements.
Sanhe Power Tech (Shenzhen) Co., Ltd.
yvonne.zhang@samwha-cn.com | www.sanhenergy.com
