Trystan Casey
The wholesale electricity price is determined by trades between generators and suppliers, which are then passed on to consumers in the retail market. Wholesale costs include initial capital, operations and maintenance, transmission, and decommissioning. The avoided cost is the minimum amount an electric utility is required to pay an independent power producer, which is usually substantially less than the retail price charged by the utility for power it sells to customers. The avoided cost rate pays members for intermittent electric generation, while the retail rate covers generation, transmission, and distribution costs.
| Characteristics | Values |
|---|---|
| Avoided cost | The "wholesale" price of electricity (cost to the utility) |
| The minimum amount an electric utility is required to pay an independent power producer | |
| The cost the utility calculates it avoids in not having to produce that power | |
| Usually substantially less than the retail price charged by the utility for power it sells to customers | |
| Wholesale electricity price | Reflects the cost of generating electricity and delivering it over the high-voltage transmission system |
| Set by trades between generators and suppliers | |
| Passed on to consumers in the retail market as the largest component of their electricity bills | |
| Fluctuates depending on the system conditions | |
| The largest portion of the wholesale cost is the energy price | |
| In New England, bought and sold through contracts and markets | |
| Contracts are between individual buyers and sellers | |
| Markets establish prices for electricity products and services through competitive bids |
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What You'll Learn
- Avoided cost is the minimum amount paid to independent power producers
- Wholesale electricity prices are set by trades between generators and suppliers
- Wholesale costs include initial capital, operations, maintenance, transmission, and decommissioning
- The price of wholesale electricity fluctuates throughout the day, seasons, and locations
- The avoided cost rate pays members for intermittent electric generation
Avoided cost is the minimum amount paid to independent power producers
Avoided cost, also known as net metering, is the minimum amount that an electric utility is mandated to pay an independent power producer under the Public Utility Regulatory Policies Act (PURPA) regulations of 1978. This amount is calculated to be equal to the costs the utility provider would have incurred if it had to produce that power itself. This cost is usually substantially lower than the retail price charged by the utility for the power it sells to customers.
Net metering allows consumers who generate some or all of their electricity to use that electricity at any time, instead of when it is generated. This is particularly important for non-dispatchable energy sources such as wind and solar power. Monthly net metering allows consumers to use solar power generated during the day at night, or wind power generated on a windy day later in the month. Annual net metering rolls over a net kilowatt credit to the following month, allowing solar power that was generated in July to be used in December, for example.
Net metering enables small systems to result in zero annual net cost to the consumer, provided that the consumer can shift demand loads to a lower-price time, such as by charging a battery electric vehicle during off-peak times. Excess generation is usually dealt with under the same rules as net metering, as it can arise when local generation exceeds demand. If local generation exceeds demand for the billing cycle, best practices call for a perpetual rollover of the kilowatt credits, although some regions have considered implementing an expiration date for these credits.
In some places, such as California, net metering has shifted to a new "net billing" structure, where the value of electricity sent to the grid from new solar energy systems is based on avoided cost rates. This has significantly lowered the value of solar exports for homeowners compared to previous policies.
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Wholesale electricity prices are set by trades between generators and suppliers
Wholesale electricity prices are determined by trades between generators and suppliers, which are then passed on to consumers in the retail market, constituting the largest component of their electricity bills. In New England, wholesale electricity is traded through contracts between individual buyers and sellers, and markets that establish prices for electricity products and services through competitive bidding. The wholesale electricity price in any hour reflects the cost of generating electricity and delivering it over the high-voltage transmission system, and varies depending on system conditions, with the energy price being the largest contributor to the wholesale cost.
The wholesale market costs incurred by load servers or suppliers are reflected in consumer electricity bills as a cents-per-kilowatt-hour (kWh) charge, often referred to as "basic service" or "default service." These wholesale energy and reliability costs are bundled with other costs from the supplier, such as contracts for electricity purchased from generators or other suppliers, and premiums charged for shielding consumers from wholesale market price volatility.
The wholesale price of electricity is influenced by the most expensive method required to meet demand, typically the burning of gas, known as "marginal cost pricing." This means that the recent increases in the cost of gas have also increased the revenues of other electricity generators, such as some renewable and nuclear generators. For instance, in 2022, Centrica, the owner of British Gas, made £753 million from its nuclear generation business. However, it is important to note that generator profits vary depending on how they sell electricity, with some renewable generators profiting from selling electricity to the wholesale market and renewable obligation certificates.
The wholesale electricity market also includes ancillary services, which ensure the hour-to-hour reliability of the power system, especially during periods of heavy demand or emergencies. Load servers and suppliers are mandated to purchase these ancillary services, along with the energy itself. The wholesale cost of electricity includes initial capital, operations and maintenance (O&M), transmission, and decommissioning costs. These wholesale costs may be passed on to consumers, depending on the local regulatory environment, and are represented as dollars per megawatt-hour (wholesale).
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Wholesale costs include initial capital, operations, maintenance, transmission, and decommissioning
The wholesale cost of electricity is the price at which electricity is first sold before being distributed to consumers on the retail level. Wholesale costs include initial capital, operations and maintenance (O&M), transmission, and decommissioning.
Initial capital costs refer to the expenses incurred at the beginning of a project or investment, such as the installation of equipment or civil works. These costs are heavily dependent on the type of technology, project size, and location. For example, renewable energy technologies like solar and wind power are more widely available, which helps reduce installation costs. In contrast, ocean energy technologies are still in the early stages of development, making installation costs highly uncertain.
Operations and maintenance (O&M) costs cover the expenses necessary to operate and maintain a facility and its equipment. These costs include staffing wages, equipment maintenance, repairs, replacements, purchased services, insurance, taxes, and fees. O&M costs are essential to ensure the reliable operation of power systems and can impact the profitability of projects.
Transmission costs refer to the expenses associated with delivering electricity over the high-voltage transmission system. These costs can vary depending on system conditions and transmission constraints, such as those that prevent the least-cost electricity from flowing freely in certain locations.
Finally, decommissioning costs are the expenses incurred at the end of a power station's life when it needs to be dismantled and the site prepared for other usage. The complexity of decommissioning varies depending on the type of power station. For example, nuclear stations involve a more complex and protracted process, including fuel removal and additional monitoring of reactor structures.
Overall, wholesale costs are a significant factor in determining the price of electricity, and they can vary based on various factors, including technology, project size, and location, as well as system conditions. These costs are passed on to consumers, reflected in their electricity bills as charges per kilowatt-hour (kWh).
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The price of wholesale electricity fluctuates throughout the day, seasons, and locations
The price of wholesale electricity is dependent on a multitude of factors and varies throughout the day, seasons, and locations. Wholesale electricity is first produced and sold before being distributed to consumers on the retail level. Wholesale costs include initial capital, operations and maintenance, transmission, and decommissioning. The wholesale price of electricity is set by trades between generators and suppliers, which are then passed on to consumers.
The wholesale electricity price in any given hour reflects the cost of generating electricity and delivering it over the transmission system, and this price can fluctuate depending on the system conditions. The largest portion of the wholesale cost is the energy price, but there are other products that are transacted through wholesale markets that ensure the reliability of the power system. These include capacity and ancillary services, which must be purchased by load servers and suppliers.
The price of wholesale electricity is influenced by fluctuations in the price of fuels used to generate electricity, such as natural gas or oil, as well as the amount of consumer demand and transmission constraints. In the UK, the wholesale price of electricity is largely determined by the price of natural gas, which is the most expensive method needed to meet demand. This is known as the 'marginal cost pricing system'.
In some states in the US, such as Connecticut, Maine, Massachusetts, New Hampshire, and Rhode Island, consumers are eligible to purchase power directly from a supplier. The price of wholesale electricity in these states can vary throughout the day and across different locations. For example, the price of wholesale electricity in New England is established through contracts between individual buyers and sellers, as well as through competitive bids in the markets.
The avoided cost, or net metering, refers to the minimum amount that an electric utility is required to pay an independent power producer under the PURPA regulations of 1978. This amount is equal to the costs the utility calculates it avoids by not having to produce that power and is usually substantially less than the retail price charged to customers. Net metering allows consumers who generate their own electricity to use that electricity at any time, rather than when it is generated.
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The avoided cost rate pays members for intermittent electric generation
The avoided cost is the minimum amount that an electric utility is required to pay an independent power producer, under the Public Utility Regulatory Policies Act of 1978 (PURPA). It is equal to the costs the utility calculates it avoids in not having to produce that power, which is usually substantially less than the retail price charged by the utility for power it sells to customers. Net metering (or net energy metering, NEM) allows consumers that generate some or all of their own electricity to use that electricity at any time, instead of when it is generated. This is particularly important for non-dispatchable sources such as wind and solar power.
The avoided cost is equal to the cost an electric utility pays to generate or purchase power. It is the expense a utility or electricity provider can avoid by not having to generate new power or purchase it from a third party. For example, if a user generates solar power on their property and "sells" it to the utility at an avoided cost rate, the solar power would be purchased at a rate equal to the utility's approximate cost to generate the same amount of electricity or buy it from another source, like a neighbouring power plant.
Avoided cost rates are the minimum price a utility must pay for the solar energy shared to the power grid from a permitted and interconnected system. They are based on the expenses an energy provider would have incurred if electricity were generated or purchased from another source. Usually only a few cents per kilowatt-hour (kWh), avoided cost rates are significantly lower than average retail rates for utility electricity.
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Frequently asked questions
Avoided cost is the minimum amount an electric utility is required to pay an independent power producer for the electricity they generate, under the PURPA regulations of 1978.
Avoided cost is calculated as the cost the utility would have incurred to produce the same amount of power itself or purchase it from another source.
Wholesale electricity prices are set by trades between generators and suppliers, reflecting the cost of generation and delivery over the transmission system. Avoided cost, on the other hand, is specific to each utility and is based on their incremental cost of generation or purchase.
It depends on the specific circumstances. In some cases, the avoided cost may be higher than the wholesale price, especially if the utility's generation costs are higher than the market price. However, in other cases, the wholesale price may exceed the avoided cost, particularly when the market price of electricity increases due to factors such as fuel price fluctuations or high demand.
Avoided cost rates can impact the overall electricity rates charged to consumers. In some cases, utilities may pass on the avoided cost rates to consumers, which can affect their electricity bills. Additionally, net metering policies, enabled by avoided costs, allow consumers to use their excess electricity generation at a later time, potentially reducing their overall electricity costs.
