Electric Rates Can Help or Hinder Heat Pump Progress

The document examines how current electricity rate designs in the U.S. often overcharge heat pump users because their peak demand occurs in winter, while grid peaks typically occur in summer. Using data from NIPSCO in Northern Indiana, the brief demonstrates that aligning rates with the actual cost of service could save electrified customers hundreds of dollars annually. It proposes several rate reform options—including seasonal heating rates, time-varying rates, and separate customer classes—while emphasizing the need for affordability measures for low-income households and the long-term evolution of rates as the grid transitions to clean energy.

• Current electricity rate designs often overcharge heat pump customers because their added demand occurs primarily in winter, whereas many U.S. grid demand peaks occur in the summer, leading these customers to pay more than their fair share of utility system costs.
• Analysis of NIPSCO in Northern Indiana indicates that while current rates would increase bills for customers replacing gas with heat pumps, aligning rates with the actual cost of service would instead result in annual savings of hundreds of dollars for those customers.
• Several rate reform strategies can make electrification more affordable, including seasonal heating rates (used by Central Maine Power and Versant Power in Maine), increasing fixed charges while reducing variable rates, implementing time-varying rates, creating a separate customer class for heat pump users, or providing fixed rebates.
• Increasing fixed charges to lower variable rates can support electrification but may negatively impact low-income customers who use less energy; California has attempted to mitigate this by combining marginal price reductions with income-based discounts.
• Rate design alone cannot solve energy poverty, as 1 in 7 households currently face a 'heat-or-eat' dilemma, necessitating additional affordability measures for low- and moderate-income customers.
• Long-term rate structures must evolve because widespread adoption of electric heating in cold climates may shift the electricity system from summer peaking to winter peaking, changing the cost of service.

APA

RMI (2024). Electric Rates Can Help or Hinder Heat Pump Progress. https://rmi.org/resources/electric-rates-can-help-or-hinder-heat-pump-progress/

Chicago

RMI. Electric Rates Can Help or Hinder Heat Pump Progress. 2024. https://rmi.org/resources/electric-rates-can-help-or-hinder-heat-pump-progress/.

Wikipedia

{{cite report |author=RMI |title=Electric Rates Can Help or Hinder Heat Pump Progress |date=5 December 2024 |url=https://rmi.org/resources/electric-rates-can-help-or-hinder-heat-pump-progress/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{rmi2024electric, author = {{RMI}}, title = {{Electric Rates Can Help or Hinder Heat Pump Progress}}, institution = {RMI}, year = {2024}, month = dec, url = {https://rmi.org/resources/electric-rates-can-help-or-hinder-heat-pump-progress/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }