Customer Support

Power Generation

We produce the power that keeps your lights on.

The Origin of Your Electricity

We generate reliable, affordable electricity at thermal power plants where coal, natural gas, oil, biomass or nuclear fuels are used to heat water into steam to drive a turbine that produces electricity. We also have wind turbines, solar panels and hydroelectric plants that generate electricity using these clean, renewable energy resources.

In total, our plants are capable of producing more than 17,000 megawatts (MW) of electricity. One megawatt of power generated by fossil fuels or nuclear fuel provides enough electricity to serve 750 typical homes.

We generate approximately two-thirds of our power and buy the remainder from other electricity suppliers to meet our customers’ energy needs. We have a diverse fuel mix.

Our Power Supply

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These charts provide a breakdown of the electricity that we supplied in 2015, including the megawatt hours that our plants generated and that we purchased from other power suppliers. The wind and solar categories also include energy purchased for our Windsource® customers and solar energy generated by customer-owned systems through our solar programs. We count nuclear and renewable energy sources as carbon free, including biomass, which is effectively carbon neutral.

For every megawatt hour of electricity that renewable sources produce, we receive a renewable energy certificate or credit (REC). Each year we retire RECs to comply with our state renewable energy standards or save RECs for future compliance. Based on market opportunities, we also sell some of our extra RECs and share any profits with customers. Learn more about RECs in our annual Corporate Responsibility Report.

Energy Saving Tip

Install ceiling fans to keep cool air circulating so you can turn down your air conditioner. Still, make sure to turn off your fan when you leave the room.


Electrical Appliance Safety

Always keep appliances clean, operating properly, and clear of obstructions. Unplug them when cleaning or repairing to avoid serious injury.

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