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By EnergyNow Editorial Staff
The debate over renewable and conventional energy is too often presented as a choice with wind and solar on one side, oil, natural gas, nuclear and hydro on the other.
That framing may be politically convenient for anti-oil and gas groups and politicians, but it bears little resemblance to the way a reliable energy system actually works.
Wind and solar power offer substantial economic, environmental and energy-security benefits. They can reduce fuel consumption, diversify electricity supply and provide relatively inexpensive power when weather conditions are favourable. Their rapid growth demonstrates that they are no longer experimental or peripheral technologies.
But wind and solar are not complete energy systems. They produce electricity intermittently, require supporting infrastructure and cannot perform many of the jobs currently handled by oil, natural gas, nuclear power and hydroelectricity.
The practical question is not whether wind and solar are good or bad. It is how to use them where they provide the most value while preserving the reliable, dispatchable and energy-dense sources that modern societies continue to need.
What Wind and Solar Can Do
The clearest advantage of wind and solar is that neither requires a continuing fuel supply. Once a project is built, sunlight and wind arrive without a commodity cost.
That can reduce exposure to volatile fuel prices and lower the operating cost of producing electricity during the hours in which the facilities are generating. Solar projects can be built at many scales, from residential rooftops and commercial buildings to large utility developments. Wind farms can supply significant amounts of electricity across regions with strong and relatively consistent wind resources.
Wind and solar are also low-emission sources of electricity. They are not completely emissions-free when manufacturing, construction, transportation and eventual decommissioning are considered. However, lifecycle studies find that their greenhouse gas emissions are substantially lower than those of unabated fossil-fuel generation. Nuclear and hydroelectric power also rank among the lowest-emission electricity sources on a lifecycle basis.
Their modular nature is another advantage. A solar development can often be constructed in stages, and individual turbines can be added to a wind project without building a single massive generating unit. In suitable locations, projects may be completed more quickly than major hydroelectric dams or conventional nuclear stations.
Distributed solar can also reduce the amount of electricity that must be moved across long-distance transmission lines during certain periods. Rooftop and commercial solar can serve some local demand close to where the electricity is consumed, although those customers usually remain dependent on the wider grid when the sun is not shining.
Globally, wind and solar are already making a meaningful contribution. In 2024, wind generated approximately 8% of the world’s electricity and solar photovoltaic facilities produced about 7%. Hydroelectricity supplied another 14%, while nuclear power generated approximately 9%. Fossil fuels still produced close to 60% of global electricity, illustrating both the rapid growth of renewables and the continuing scale of conventional generation.
The expansion has continued. The International Energy Agency estimates that approximately 800 gigawatts of renewable capacity were added globally in 2025, with solar accounting for more than three-quarters of the total and wind representing about 20%.
Installed Capacity Is Not the Same as Reliable Supply
Announcements about new wind and solar projects usually emphasize their nameplate capacity—the maximum output they could produce under ideal conditions.
But a 500-megawatt solar facility cannot be treated as the operational equivalent of a 500-megawatt nuclear, hydroelectric or natural-gas facility.
Solar output changes with the time of day, season, cloud cover, snow accumulation and geographic location. Wind generation changes with weather patterns and can rise or fall rapidly. The amount of electricity actually produced over a year is therefore considerably less than the project’s theoretical maximum.
This does not make the electricity worthless. It means its value depends partly on when it is produced and what other resources are available on the grid.
Solar can be particularly valuable where electricity demand rises during hot, sunny afternoons because of air conditioning. Wind can complement solar when stronger winds occur during evenings, overnight or in different seasons. Geographic diversity can also help: the wind may be calm in one area while turbines continue generating elsewhere.
Nevertheless, there will be periods when wind and solar production are simultaneously low. A reliable system must be prepared for those conditions, not merely for an average day.
The IEA says integrating growing volumes of variable renewable power requires dispatchable generation, stronger transmission systems, storage and more flexible electricity demand.
What Wind and Solar Are Not
Wind and solar are not dispatchable in the traditional sense. Grid operators can reduce their output when too much electricity is being produced, but they cannot command the sun to shine or the wind to blow when additional power is urgently needed.
They are not automatically available during the coldest winter night, a prolonged period of extreme heat or a major industrial demand spike. Reliability must therefore be supplied by the system around them.
They are also not “free energy.” Although there is no fuel bill, projects still require land, materials, financing, construction, grid connections, maintenance, backup services and eventual decommissioning. As renewable penetration rises, additional transmission, storage and grid-management costs can become increasingly important.
The IEA has warned that electricity-generation investment has been growing much faster than spending on transmission and distribution networks. Grid congestion is already delaying new projects and causing more wind and solar electricity to be curtailed when it cannot be moved to customers.
Nor are wind and solar environmentally impact-free. Large developments require land and access roads. Transmission corridors must be constructed. Turbines can affect birds, bats, viewsheds and nearby communities. Solar developments require significant quantities of glass, steel, aluminum, copper and other materials, while both technologies eventually create recycling and disposal challenges.
These impacts may be manageable, but they should not be dismissed simply because the projects are classified as renewable.
Batteries Help—but Do Not Solve Everything
Battery storage is becoming an increasingly valuable partner for wind and solar. Batteries can absorb surplus electricity and return it to the grid later. They can smooth short-term changes in output, shift solar electricity from midday into the evening and provide frequency regulation and other essential grid services.
But batteries store electricity; they do not create it.
Most battery systems are designed to move electricity across hours, not to supply an entire region through several windless winter days or prolonged seasonal shortages. Building enough batteries for those circumstances would require much larger investments and far more storage capacity.
The IEA reported that more than 75 gigawatts of battery storage were added globally in 2024, but it also cautioned that batteries cannot answer every reliability problem, particularly when flexibility is required across weeks or seasons.
Long-duration storage, pumped hydro, hydrogen, thermal storage and other technologies may eventually provide additional options. For the foreseeable future, however, dispatchable generation will remain an essential part of most electricity systems.
Natural Gas as a Balancing Partner
Natural gas plants can increase or decrease generation relatively quickly, making them useful for balancing changing wind and solar output. A gas facility may operate less frequently as renewable generation increases, but its ability to produce electricity on demand can become more—not less—important to system reliability.
This creates an economic challenge. A power plant that runs only during periods of low renewable production may sell less electricity while still being required to maintain its equipment, workforce, fuel contracts and generating capacity.
Electricity-market rules will increasingly need to compensate resources not only for the energy they produce, but also for the reliability, reserves and grid services they provide.
Natural gas is not the only balancing option, but in regions without large hydroelectric reservoirs or sufficient nuclear capacity, it is often the most practical dispatchable partner for variable renewables. Conventional power plants remain the primary source of system flexibility globally, although batteries are assuming a larger role.
Nuclear and Hydro Provide the Foundation
Nuclear power can provide large volumes of low-emission electricity day and night, regardless of the weather. Its high capital cost, long development timelines and political challenges are significant, but its reliability and energy density make it fundamentally different from weather-dependent generation.
Rather than viewing nuclear and renewables as competitors, a system can use nuclear plants to provide a steady foundation while wind and solar reduce the amount of other generation required when conditions permit.
Hydroelectricity can be an especially effective partner. Reservoir-based hydro facilities can often increase or decrease output quickly, saving water when solar and wind production is high and releasing it when renewable output falls. Pumped-storage hydro can also act as a large energy-storage system.
The IEA describes hydroelectricity as an important source of both flexible electricity and storage for grids incorporating larger amounts of variable renewable generation.
Regions fortunate enough to possess significant hydro resources have an advantage that cannot necessarily be replicated elsewhere.
Solar and Wind Do Not Replace Everything Oil Does
One of the most misleading elements of the energy debate is the suggestion that adding solar panels and wind turbines directly eliminates the need for oil.
Wind and solar primarily produce electricity. Oil is used mainly as a transportation fuel and as a feedstock for thousands of products, including plastics, chemicals, lubricants, synthetic materials and asphalt. It also remains important in aviation, marine transportation, heavy equipment, agriculture and some industrial processes.
Electrification can reduce petroleum consumption in passenger vehicles and some heating applications. But a wind turbine does not directly produce jet fuel, diesel, petrochemicals or road-building materials.
Oil demand may evolve as technology changes, but it should not be treated as if it occupies exactly the same market as renewable electricity.
The Goal Should Be a Better System, Not an Ideological Victory
A sensible energy strategy should welcome wind and solar where they are technically appropriate, economically competitive and supported by the necessary infrastructure.
It should also recognize that reliability is not optional.
Wind and solar can reduce fuel consumption, lower emissions and diversify electricity supply. Natural gas can provide flexible generation. Nuclear can provide firm, high-density, low-emission power. Hydroelectricity can deliver both energy and flexibility. Oil will continue to serve transportation, industrial and material uses that cannot simply be replaced by additional electricity generation.
Different regions will arrive at different combinations depending on their geography, resources, climate, existing infrastructure and industrial requirements. There is no universal percentage that every jurisdiction should obtain from each source.
Wind and solar are real energy resources with real benefits. They are neither a hoax nor a complete replacement for conventional energy. Their greatest value emerges when they are integrated honestly into a diversified system, one that measures success not by how much capacity is announced, but by whether energy remains reliable, affordable and available when people need it.
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