Hybrid DC systems
Hybrid −48 V DC systems that blend rectifier power (grid / genset) with renewable / solar sources and LiFePO4 backup, keeping off-grid and poor-grid telecom sites on air. The outdoor hybrid DC cabinet and outdoor LiFePO4 battery family, with flexible 10–50 A MPPT solar charging, cut diesel run-hours and OPEX at remote sites.
Key applications: off-grid telecom towers, hybrid solar / diesel sites, poor-grid and unstable-mains sites, remote BTS.
Why hybrid DC
Multi-source hybrid
Blend grid / genset power with renewable / solar generation; the battery floats on the bus and buffers the load, reducing diesel run-hours at off-grid and poor-grid sites.
Proven power platform
RM4850 / RM4875 hot-swap rectifier modules and the MCU-SM32Z controller, interchangeable with the indoor FO-DC-48 range, or fanless DC Lite modules for compact pole and rooftop sites.
Solar-ready lithium backup
The FO-LB48050-O LiFePO4 battery (48 V / 50 Ah, 2000 cycles @ 80% DOD) charges at a flexible 10–50 A that suits hybrid energy plans, with zero-transfer takeover on grid loss.
Site protection
Class C surge protection, LLVD / BLVD battery management and remote supervision keep unmanned hybrid sites protected and observable.
Hybrid line-up
| Model | Type | Rating |
|---|---|---|
| Hybrid DC cabinet | Outdoor hybrid system with MPPT solar charging | 400 A |
| Outdoor LiFePO4 battery | Outdoor lithium string | 48 V · 50 Ah |
Hybrid model designations follow the FO-DC-48 series. Additional hybrid ratings, IP class and renewable-source options are confirmed on the official datasheet.
System & hybrid
| Parameter | Value |
|---|---|
| System voltage | 48 V DC nominal (−48 V) |
| Rectifier modules | RM4850 (50 A) / RM4875 (75 A), hot-swap, N+1 (cabinet builds) |
| Hybrid sources | Grid / genset + renewable / solar |
| Battery | FO-LB48050-O LiFePO4, 48 V / 50 Ah, 10–50 A charge |
| AC input | 85–300 Vac, single- or three-phase |
| Peak efficiency | ≥96% (rectifier); >95% (DC Lite) |
| Operating temperature | Rated for operation down to −40 °C |
| Enclosure protection | Weather-rated outdoor enclosure |
| Controller | MCU-SM32Z, LCD, RS232 / RS485, SNMP, dry-contact alarms |
| Battery management | LLVD / BLVD disconnect, temperature-compensated charging, battery test |
| Protection | Class C SPD, input / output breakers, over- / under-voltage and over-temperature shutdown |
Specifications reflect the FIBER OCEAN FO-DC-48 hybrid range and the outdoor LiFePO4 battery. Regional configuration and renewable-source options are confirmed per project.
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