Repowering Photovoltaic Farms: A Second Life for Solar Energy

Over the last decade, photovoltaics has experienced exponential growth worldwide, driven by the need to transition to renewable energy sources.
Many solar farms, some installed more than a decade ago, have already fulfilled most of their expected lifespan, which ranges from 20 to 30 years.
However, with recent technological advances, a question arises: is it better to build new solar farms or upgrade existing ones?

The repowering of a photovoltaic farm is presented as an economical and efficient alternative to the construction of new facilities.
This process involves upgrading or renewing certain components of a solar farm to improve its performance and extend its useful life, taking advantage of technological and structural advances that were not available at the time of its original construction.

What is the repowering of a photovoltaic park?

Repowering consists of upgrading existing installations to maximize energy production.
In a photovoltaic park, this may involve several actions, such as:

Replacement of older solar modules: Older solar panels, which were installed with previous generation technologies, have a significantly lower efficiency (around 15%) compared to modern modules that exceed 20% efficiency.
Replacing these panels can increase the power generation capacity without the need to expand the occupied surface area.

Inverter upgrades: Solar inverters, which convert the direct current generated by the panels into alternating current, have also seen improvements in terms of efficiency and durability.
Replacing obsolete inverters with more efficient models not only improves energy yield, but also reduces maintenance downtime.

Optimization of solar tracking systems: Tracking systems that orient solar panels towards the sun have evolved to be more accurate and robust.
Upgrading or implementing these systems can increase energy collection, especially in areas where solar radiation varies considerably throughout the day.

Improvements in the storage infrastructure: In some cases, it is possible to add or improve the energy storage system by means of batteries, thus allowing greater flexibility in the power supply, especially at night or on cloudy days.

How is repowering carried out?

The repowering process begins with a thorough evaluation of the existing installation.
This involves reviewing the condition of the solar modules, inverters, mounting structures and other equipment to identify components that need to be replaced or upgraded.
This technical diagnosis will allow informed decisions to be made about which parts of the solar farm require urgent attention and which can continue to operate with minor modifications.

Once this analysis has been carried out, a repowering plan is drawn up.
This plan details the equipment to be replaced, the deadlines, the costs and the impact that these modifications will have on the energy production capacity.
The repowering can be carried out in phases, in order to minimize interruptions in power generation, or in a comprehensive manner if the conditions of the wind farm allow it.

What improvements can be expected from a repowered park?

The improvements resulting from the repowering of a photovoltaic park are substantial:

Increased energy efficiency: Thanks to new modules and advanced technologies, the amount of energy generated per square meter of solar panel increases significantly.
This can represent a 20% to 30% increase in production, depending on the initial conditions of the farm.

Increased service life: Modernizing a PV farm not only increases generating capacity, but also extends its service life.
With more robust and efficient components, a repowered solar farm can operate optimally for an additional 15 to 20 years.

Reduced operating costs: New inverters and monitoring systems tend to be more reliable and require less maintenance, which lowers long-term operating costs.
It also improves real-time problem detection and resolution, reducing downtime.

Leveraging existing space: By upgrading the modules without increasing the surface area of the park, the energy generation density is increased, which makes the initial investment in land and infrastructure have a better return.

When to repower a photovoltaic park?

There are several factors that indicate when is the ideal time to repower a PV farm:

Age of the farm: Generally, older solar farms, with more than 10 to 15 years of operation, are ideal candidates for repowering, as the technology with which they were built has become obsolete compared to today’s standards.

Component degradation: Solar panels, although robust, experience gradual degradation in performance, often around 0.5% per year.
When this loss of efficiency becomes significant, it is time to consider upgrading.

Regulatory changes: In some cases, renewable energy regulations change, offering tax incentives or subsidies for the modernization of solar farms.
This can accelerate the decision to repower.

Increased demand: If the demand for energy in the park’s region has grown, repowering can be an efficient strategy to increase supply without the need to build new plants.

What partner is needed to carry out a repowering?

The repowering of a photovoltaic park is a complex task that requires the collaboration of several actors.
First of all, it is essential to have a company specialized in photovoltaic energy with experience in solar plant modernization.
These companies must be familiar with the latest technologies and have the capacity to carry out technical and economic feasibility studies.

In addition, it is crucial to involve a reliable equipment supplier that offers high-quality solar modules, inverters and tracking systems.
This partner must ensure that the components supplied comply with the latest standards and offer a long service life.

Finally, it will be necessary to work closely with grid engineers and infrastructure operators, as improvements in generation capacity may require adaptations to grid connections and storage systems.

Conclusion

Repowering PV farms has become a key strategy for maximizing the performance of existing solar installations.
By taking advantage of the latest technologies, it can improve efficiency, reduce costs and extend the life of farms, all without the need for land expansion.
In a world where the energy transition is becoming increasingly urgent, repowering presents itself as an efficient and cost-effective solution to accelerate the shift to a more sustainable energy model.

If you are thinking of upgrading your facility, we are at your disposal to make it happen. You can contact us through our website www.esasl.com or at 96 352 38 20