Remote telecommunications equipment can require dependable power for radios, transmission devices, network switches and site-control hardware. Solar and battery power may be considered where grid extension is impractical, as part of a hybrid arrangement, or for a defined low-power communications node.
A solar system is not a universal replacement for every base-station supply. The proposed configuration must be based on the actual DC load, peak demand, availability target, seasonal solar resource, thermal conditions and any existing grid or generator interface.
Separate continuous and peak loads
Begin with a load schedule for the radio, backhaul equipment, router or switch, environmental-control hardware and any monitoring device. Record nominal DC power, peak current, voltage, operating time and expected future expansion. Do not estimate the system from a single device rating when several communications components operate continuously.
Prioritise DC efficiency and protection
Many communications loads are inherently DC. A correctly specified DC bus and protected distribution can reduce unnecessary conversion losses, subject to the equipment manufacturer’s voltage requirements. Review over-current protection, disconnects, grounding, lightning protection, cable routing and enclosure access as part of the whole system.
Account for location and service access
- Solar access and seasonal shading
- Panel mounting area, wind loading and structural constraints
- Battery temperature and enclosure ventilation
- Site access for inspection or battery replacement
- Backup strategy during extended low-sunlight periods
Hybrid operation needs explicit design
If solar is intended to work with grid or generator power, charging source priority, transfer method, battery protection and operating limits need to be defined for the particular equipment. These details should be reviewed by the project engineer rather than inferred from a standard off-grid package.
Frequently asked questions
Can solar power supply a wireless backhaul node?
It can be suitable for a defined load when the radio, modem, switching equipment and environmental loads are all included in the calculation.
What information is required to size the system?
Provide DC voltage, daily energy use, peak current, equipment datasheets, location, temperature range, backup requirement and any future expansion plan. See our remote site solar power kits for the types of inputs used in a project review.