Power Challenges at Remote Telecom Sites : 6kW Rectifier and 6kW Solar Systems Integrated in One Outdoor Cabinet

Why Does Power Architecture Matter for Remote Telecom Sites?

When mobile communication base stations are deployed in remote areas, power availability, equipment space, energy storage, and maintenance requirements need to be considered together. For outdoor sites where grid power may be limited or unavailable, selecting a backup battery alone is not sufficient. Engineers also need to evaluate the relationship between rectification, solar input, battery storage, and remote monitoring.

The ET15075200A-38U is a double-cabin outdoor power cabinet designed for telecom sites. It provides 2 × 38U of 19-inch standard rack space and integrates a 6kW rectifier system with a 6kW solar system for powering active and passive telecom equipment.

How Does the 6kW Rectifier and 6kW Solar Architecture Work?

What Are the Roles of the Rectifier and Solar Systems?

The ET15075200A-38U uses an ET48200-M5K45 power sub-rack with a 5U height and 19-inch standard rack-mounting format. Its configuration includes a 6kW rectifier system (2 × 3kW) and a 6kW solar system (2 × 3kW).

From an equipment-selection perspective, the key point is not simply the “6kW + 6kW” figure. Project engineers should confirm the actual load, power-input conditions, and solar configuration. The datasheet specifies the rated system configuration but does not provide site-specific solar generation, load profiles, or solar utilization data. These factors therefore require separate project-level calculations.

-48VDC Supports Telecom Power Configurations

The DC output has a nominal voltage of -48VDC, with LLVD and BLVD MCBs as well as battery breakers included in the power architecture.

For telecom base-station applications, equipment selection should therefore verify the required DC input voltage, output circuits, and rated current rather than relying only on the total rectifier capacity.

Why Should Battery Storage and Remote Monitoring Be Considered?

LiFePO4 Batteries Provide a Defined Cycle-Life Specification

The ET15075200A-38U includes six sets of LiFePO4 batteries, each rated at 48V and 200Ah, with the datasheet specifying 6,000 cycles. Each battery measures 442 × 520 × 244 mm and weighs 79.3 kg.

These specifications can be used to check cabinet space, battery installation requirements, and the required energy-storage configuration. However, the 6,000-cycle figure is a product specification and should not be interpreted as a guaranteed service life under every field condition.

Environmental Monitoring Supports Remote O&M Planning

The integrated FSU can monitor temperature, humidity, smoke, water leakage, and door status, while supporting connection to a customer's central monitoring platform. The controller also supports SNMP communication.
For remote telecom sites, these monitoring functions can be considered as part of the overall O&M architecture, helping project teams determine which site conditions need to be monitored remotely.

How Should an Outdoor Hybrid Power Cabinet Be Evaluated?

Power capacity is only one part of the selection process. Environmental conditions should also be checked. The ET15075200A-38U is specified for an operating temperature of -40°C to +55°C with solar radiation, operating humidity of 5%–95% non-condensing, and an operating altitude of 0–4,000 m.

For an outdoor power cabinet at a remote telecom site, four areas can therefore be reviewed: load demand, power input, energy-storage requirements, and environmental conditions. If solar power is part of the project, local solar resources, load profiles, and system design parameters should also be evaluated.

Conclusion: Select the System, Not Just the Power Rating

For remote telecom base stations, an integrated hybrid power cabinet can combine power conversion, solar input, battery storage, and monitoring within one outdoor system.

The ET15075200A-38U provides a defined configuration of 6kW rectification + 6kW solar, -48VDC output, six 48V/200Ah LiFePO4 battery sets, and remote monitoring functions. These specifications provide a clear technical basis for evaluating an integrated power solution for outdoor telecom sites.

Final selection should still be based on actual load demand, available power sources, solar resources, and site conditions rather than the rated power figure alone.