Hybrid energy systems combining photovoltaic generation, battery storage and conventional backup generation have been used for decades in telecom infrastructure, particularly in remote areas with limited or no grid access.
EUDITI and its founders have been involved in the development and implementation of large-scale hybrid telecom projects since the early stages of the technology, at a time when photovoltaic module costs were significantly higher than today. Despite this, hybrid systems were already preferred over continuous diesel generator operation.
This was not primarily due to the cost of electricity, but to broader operational considerations. Diesel generators operating continuously at low load are inefficient, require frequent maintenance, experience higher failure rates and depend on complex fuel logistics, especially in remote locations.
Experience from telecom projects, particularly in Africa, shows that hybrid systems do not underperform due to technological limitations, but mainly due to operational and implementation factors. The most critical factor is the ability to ensure reliable operation and maintenance.
Remote locations, limited access and lack of trained personnel can lead to delayed interventions and prolonged system downtime. In such cases, systems often revert to diesel-based operation, reducing the expected benefits of hybridisation. Equally important is the availability of monitoring and data.
Local conditions also play a decisive role. High temperatures, dust and site-specific risks such as equipment theft can significantly affect system performance and component lifetime. These factors must be incorporated into system design and operational planning from the outset.
Another important lesson is that hybrid systems must be adapted to local operational practices. In many regions, local operators have extensive experience in running diesel generators and are highly familiar with their maintenance and operation. Hybrid systems must therefore be designed and implemented in a way that integrates with existing practices and capabilities.
The ongoing transition from conventional battery technologies to lithium-based systems introduces additional challenges. While lithium batteries offer significant technical advantages, their successful deployment requires properly trained local personnel and adapted maintenance practices.
Key takeaway
Hybrid systems succeed when technology, logistics, local operating practices, monitoring and after-sales support are designed as one integrated system.