Why Ontario’s Big Move to Battery Storage Has Observers Saying ‘Gas Plants Aren’t Competitive Anymore’

Ontario has secured the lowest-cost electricity capacity procurement in the province’s history, with battery storage projects outcompeting natural gas plants in the latest energy auction. According to the Government of Ontario, this transition indicates a shift in the economic viability of peaking power sources, as batteries now offer a cheaper alternative to traditional gas-fired generation for managing peak demand.

What happened in Ontario’s latest electricity capacity auction?

The Government of Ontario recently completed a procurement process designed to ensure the province has enough electricity to meet peak demand. The results showed that battery storage systems were able to underbid natural gas plants, securing contracts to provide essential capacity to the grid. According to official provincial data from ontario.ca, this specific procurement represents the lowest cost for capacity in Ontario’s history.

Capacity procurement is the process by which the province pays power providers to ensure they are available to generate or release electricity during the highest periods of demand—such as extreme heatwaves in the summer or deep freezes in the winter. While natural gas plants have traditionally filled this “peaking” role, the latest auction results demonstrate that large-scale battery installations can now perform this function more affordably.

The shift is not merely about the cost of the hardware but the overall cost of delivery. According to reports from the National Observer, the auction results indicate a clear victory for storage technology over fossil-fuel-based generation. This outcome suggests that the price point for utility-scale batteries has dropped sufficiently to make them the preferred economic choice for the province’s energy planners.

• Primary Outcome: Battery storage projects won the majority of the capacity contracts.
• Cost Milestone: The procurement is cited by the province as the most cost-effective in its history.
• Industry Shift: Natural gas, once the default for peaking power, failed to beat battery pricing in this cycle.

Why are observers saying gas plants aren’t competitive anymore?

Industry observers, as noted in reporting by the Toronto Star, point to a fundamental change in the economics of energy storage. For decades, natural gas plants were the only viable option for “firm” capacity—power that can be turned on almost instantly when the grid is stressed. However, the rapid decline in the cost of lithium-ion and other battery technologies has eroded that advantage.

According to the National Observer, the latest auction results serve as a market signal. When the province opens a competitive bid process and batteries consistently underbid gas, it indicates that the capital and operational costs of storage are now lower than those of building and maintaining new gas-fired peaking plants.

Several factors contribute to this loss of competitiveness for gas:

1. Capital Expenditures: Building a new gas plant requires significant infrastructure, including pipeline connections and extensive permitting, which adds to the upfront cost.
2. Operational Efficiency: Peaking gas plants often sit idle for most of the year, making their cost-per-hour of actual operation very high.
3. Price Trajectory: Battery costs have followed a downward curve for years, while the costs associated with gas infrastructure have remained steady or increased due to regulatory and environmental requirements.

This economic reality has led to the conclusion that gas plants are no longer the most competitive tool for managing short-term spikes in electricity usage. This does not necessarily mean existing gas plants will be shut down immediately, but it suggests that new investment is shifting toward storage.

How does battery storage actually support the Ontario power grid?

To understand why batteries are replacing gas, it is necessary to distinguish between “baseload” power and “peaking” power. Baseload power—provided by nuclear and hydroelectric plants in Ontario—runs constantly. Peaking power is only needed for a few hours a month when demand spikes.

Battery storage operates by absorbing excess electricity from the grid during periods of low demand (such as the middle of the night) and discharging that electricity back into the grid during peak periods. According to the Government of Ontario, this allows the province to maximize the use of its existing clean energy sources without needing to fire up carbon-intensive gas plants to bridge the gap.

The technical advantages of batteries over gas include:

• Response Time: Batteries can discharge power almost instantaneously, whereas gas turbines require a “ramp-up” period to reach full capacity.
• Location Flexibility: Batteries can be placed in specific areas of the grid where congestion is a problem, reducing the need for expensive new transmission line construction.
• Carbon Footprint: Because they store existing clean energy rather than burning fuel, batteries help the province meet emissions targets.

For a deeper look at how this fits into the broader strategy, readers may find a related explainer on Ontario’s energy transition goals helpful.

What are environmental groups saying about the shift to storage?

Environmental organizations have reacted positively to the auction results. According to CityNews Halifax, these groups view the preference for battery storage over natural gas as a significant win for the climate. The primary concern for environmental advocates has been the potential for “lock-in,” where building new gas plants commits the province to decades of fossil fuel emissions.

By choosing batteries, the province avoids creating new dependencies on natural gas infrastructure. Environmental groups argue that this move aligns the province’s energy procurement with its long-term goals of reducing greenhouse gas emissions. The success of the auction proves that decarbonizing the grid does not have to come at a higher cost to the taxpayer; in this instance, the cleaner option was also the cheaper one.

The sentiment among these groups is that the market is finally reflecting the true cost of energy. When the “lowest-cost” option is also the “lowest-carbon” option, it removes the political and economic tension often associated with green energy transitions.

Comparing Battery Storage vs. Natural Gas for Peaking Power

The following table summarizes the key differences between these two technologies as they relate to the recent Ontario procurement findings.

What are the long-term implications for Ontario’s energy market?

The decision to prioritize battery storage has several long-term implications for how Ontario manages its electricity. First, it changes the risk profile for energy investors. Companies that previously specialized in gas-fired generation may need to pivot their business models toward storage and renewable integration to remain viable in the Ontario market.

Second, this move increases the value of other renewable sources. Since batteries can store energy, the province can potentially integrate more wind and solar power—which are intermittent—without worrying that the grid will crash when the sun sets or the wind stops blowing. The batteries act as a buffer, smoothing out the variability of renewables.

Third, the “lowest-cost” nature of this procurement suggests a potential for lower or more stable electricity rates for consumers over time. According to the Government of Ontario, securing capacity at historic lows reduces the overall cost of maintaining grid reliability, which is a key component of the monthly electricity bill.

The Role of the IESO and Provincial Oversight

The Independent Electricity System Operator (IESO) manages the day-to-day flow of electricity in Ontario. The results of this procurement give the IESO a more flexible toolkit. Instead of relying on the mechanical inertia of large gas turbines, the IESO can use the digital precision of battery arrays to balance the grid in real-time.

This transition also reduces the province’s exposure to the volatility of natural gas prices. When the province relies on gas for peaking power, a spike in global gas prices (caused by geopolitical instability or supply chain issues) can drive up the cost of electricity. Batteries, once installed, do not require a continuous stream of expensive fuel to operate.

Are there any risks or misconceptions regarding battery storage?

While the economic and environmental data are positive, some observers raise questions about the long-term durability of batteries compared to gas plants. A common misconception is that batteries cannot provide “firm” power for long periods. It is true that most current utility-scale batteries are designed for short-duration storage (e.g., 2 to 4 hours), whereas a gas plant can run as long as it has fuel.

However, for the specific purpose of “peaking”—which usually involves managing a few hours of extreme demand—short-duration batteries are sufficient. The province is not replacing its entire baseload (nuclear) with batteries; it is replacing the “peak” capacity. This is a critical distinction that explains why batteries can win an auction for capacity without needing to provide 24/7 power for weeks on end.

Another concern involves the supply chain for battery materials, such as lithium and cobalt. While gas plants rely on pipeline stability, batteries rely on mineral mining. This creates a different set of geopolitical risks, though the provincial government’s move suggests that the current cost advantage of batteries far outweighs these risks in the immediate term.

For more information on the materials used in these systems, you may want to view a detailed report on the battery supply chain.

How does this compare to energy trends in other jurisdictions?

Ontario’s experience mirrors a broader global trend where “big batteries” are displacing gas peakers. In markets like California and South Australia, large-scale battery installations have already proven that they can stabilize the grid more effectively than gas. These jurisdictions have seen similar patterns: initial skepticism followed by a realization that the cost-per-megawatt of storage has plummeted.

The difference in Ontario is the explicit confirmation through a competitive procurement process. By allowing the market to decide, the Government of Ontario has provided empirical evidence that the “gas is better” argument is no longer supported by the numbers. This puts Ontario in line with the most aggressive energy-transitioning economies in the world.

Key takeaways from the market shift:

• Market Validation: The auction provides hard data that batteries are the cheaper option for peaking power.
• Strategic Alignment: Economic incentives are now aligned with environmental goals.
• Infrastructure Evolution: The grid is moving from a centralized, fuel-burning model to a distributed, storage-based model.

Frequently Asked Questions

Why are batteries cheaper than gas plants for peaking power?

According to the Government of Ontario and reports from the National Observer, batteries have lower capital costs and do not require expensive fuel infrastructure like pipelines. Additionally, the global price of battery technology has dropped significantly, while the costs of building new gas plants have remained high due to regulatory and construction expenses.

Does this mean Ontario is shutting down all its gas plants?

No. The current move focuses on “capacity procurement” for new or additional power. Existing gas plants may still operate, but the latest auction suggests that building new gas plants is no longer the most competitive way to ensure grid reliability.

Can batteries really handle a massive heatwave or cold snap?

Yes, for the duration of the “peak.” Batteries are designed to discharge large amounts of power quickly during the few hours of maximum demand. They work alongside baseload power (like nuclear) to ensure the grid remains stable during extreme weather events.

Who benefits most from the lowest-cost electricity procurement?

According to provincial data, the primary beneficiaries are the ratepayers. By securing necessary grid capacity at the lowest price in history, the province reduces the overall cost of maintaining the electricity system, which helps prevent steep increases in electricity bills.

What is “capacity procurement” exactly?

Capacity procurement is a process where the government or grid operator pays power producers to ensure they have the ability to provide power when needed. It is essentially an insurance policy for the grid, ensuring there is enough “backup” power to prevent blackouts during peak usage.

The transition toward battery storage marks a definitive shift in Ontario’s energy strategy. By leveraging market competition, the province has demonstrated that the era of relying on new natural gas plants for grid stability is being challenged by the superior economics of energy storage. As the grid continues to evolve, the focus will likely shift toward how to further integrate these batteries with increasing amounts of wind and solar power to create a fully decarbonized, low-cost energy system.