Hybrid Solar And Wind Systems With Battery Storage Redefine Reliable Clean Energy Supply—Report

Solar and wind energy have now become the cheapest sources of new electricity generation across the world. However, as countries rapidly increase the use of renewable energy, one major challenge remains: how to provide stable electricity when sunlight is unavailable or when wind speeds drop. A new report by the International Renewable Energy Agency (IRENA) explains how modern technologies are solving this issue through advanced battery storage and hybrid renewable systems.

The report introduces the concept of “firming costs,” which refers to the additional expense required to make renewable energy available continuously, just like traditional power plants. Instead of using the usual Levelised Cost of Electricity (LCOE), which only measures generation costs, IRENA uses a broader metric called “firm LCOE” (F-LCOE). This new measurement reflects the true cost of delivering reliable renewable electricity with the help of Battery Energy Storage Systems (BESS) and additional generation capacity.

According to the report, combining solar photovoltaic (PV) plants or onshore wind projects with battery storage systems is creating a new generation of highly reliable clean energy assets. These co-located hybrid projects can provide a stable power supply at prices that are now becoming competitive with conventional fossil fuel-based electricity. In several regions with strong renewable resources, these hybrid systems are already delivering electricity at lower costs than coal or gas power generation.

One of the major examples highlighted in the report is the Al Dhafra solar project in the UAE. The project combines 5.2 GW of solar capacity with 19 GWh of battery storage to deliver a continuous 1 GW supply of clean electricity. The estimated cost of this firm’s renewable power is around USD 70 per megawatt-hour, demonstrating how renewable energy paired with storage can compete with traditional power generation.

The growing demand for uninterrupted electricity is also driving the adoption of these systems. Industries such as artificial intelligence infrastructure, advanced manufacturing, and large-scale data centers require a constant and reliable power supply. Hybrid renewable systems with battery storage are increasingly seen as a practical solution for meeting these energy-intensive demands while reducing carbon emissions.

The report also highlights the dramatic fall in renewable energy costs over the past decade. Between 2010 and 2024, solar PV installation costs declined by 87%, onshore wind costs dropped by 55%, and battery storage prices fell by an impressive 93%. China currently leads global cost reductions, with many of its solar-plus-storage projects now capable of delivering firm electricity below USD 100/MWh. Similar trends are also emerging in countries such as India, Brazil, Australia, and South Africa.

However, the report notes that policy and regulatory support remain essential for faster deployment. Existing electricity markets were originally designed for conventional power plants and often fail to properly value the reliability and flexibility offered by hybrid renewable systems. Governments are therefore introducing measures such as fiscal incentives, round-the-clock renewable energy tenders, and supportive regulations to accelerate adoption.

Looking ahead, the report suggests that long-duration energy storage, artificial intelligence-based forecasting tools, and stronger regional power grid connections will further reduce firming costs. These developments could make round-the-clock renewable energy more affordable, secure, and scalable in the coming years while reducing dependence on volatile global fuel markets.