The high penetration of photovoltaic energy in the electrical system is causing a continuous decline in energy prices captured in the daily market, according to reports by Alantra, driving the development of storage projects, which are becoming a key player in stabilizing the grid and improving the profitability of renewable installations.

This trend is expected to continue until 2027, as analysts indicate, with average spreads of 70 euros over the next 15 years.

In this context, the buying and selling of standalone or hybrid batteries with solar and wind plants is becoming increasingly common.

“Interest has grown in recent months. Entire BESS developers are up for sale right now, as there is appetite to buy entire portfolios or teams that develop them,” says Carmen Izquierdo Serrano, CEO of nTeaser.

In an interview with Energía Estratégica España, the executive explains that the batteries listed on their platform typically have a capacity of 2 to 4 hours, depending on the project.

Prices are calculated based on installed power in €/MW, with values ranging from €30,000 to €60,000/MW installed, in line with what was observed four or five years ago in photovoltaics.

However, the impact of recent PERTE subsidies on market prices is yet to be seen, which could modify offers in the coming days.

Regarding sales contracts for hybrid projects, Izquierdo points out that prices are offered per MW of installed power, separating the different technologies involved.

“While photovoltaic and wind technologies are generally more advanced, storage is usually in the early stages of development, and in some cases, contracts include the condition of adding storage capacity to close the deal,” she adds.

Regarding the commercialization of these installations, she explains that sellers prefer to take their projects to the Ready to Build (RtB) stage before putting them up for sale, although some buyers are comfortable acquiring projects in earlier stages or through co-development agreements.

Finally, Izquierdo states that the anticipated implementation of the capacity market could be the final boost for the development of storage technologies, although she mentioned that they do not expect its launch until “before 2025.”

According to her expectations, once this market is operational, it could have a significant impact on the mass adoption of these solutions, improving the economic viability of storage projects.