Renewables
MIT study links utility solar to lower US electricity prices
Research from the Massachusetts Institute of Technology indicates utility-scale solar correlates with lower residential electricity costs, while rooftop systems link to higher bills.
Key points
- Utility-scale solar is linked with lower residential power costs in the United States.
- Rooftop solar installations correlate with higher electricity prices for consumers.
- Researchers highlight potential cost-shifting and grid integration issues associated with distributed solar.
What happened
A recent study by researchers at the Massachusetts Institute of Technology examined the relationship between renewable energy deployment and residential electricity prices across the United States. According to pv magazine, Fischer J. Espiritu Argosino and Christopher R. Knittel analysed a state-utility panel spanning from 1998 to 2023 using data from federal agencies.
The findings indicate that renewable portfolio standards and utility-scale renewable generation do not drive up residential electricity bills. Specifically, utility-scale solar projects are associated with reduced generation costs. Conversely, the analysis found a correlation between higher rooftop solar adoption and increased consumer prices.
Why it matters
The authors suggested that large solar facilities help lower overall generation expenses because they avoid fuel input costs and can reduce network congestion. On the other hand, the upward price pressure linked to rooftop installations may stem from existing rate structures. These tariffs can shift fixed grid costs from rooftop system owners onto other ratepayers.
Additionally, the study noted that distribution operation and maintenance costs increased alongside rooftop solar adoption. This is partly because local distribution networks were not originally constructed to manage two-way power flows.
What comes next
The working paper highlights debates regarding cost allocation in solar markets, such as ongoing discussions in California over financial shifts between solar and non-solar customers. The researchers advised policymakers to focus on improving large-scale renewable integration while establishing fairer cost recovery frameworks to maintain electricity affordability.
Original reporting
This article draws on the following reports. Read them in full on the publishers’ sites.
Context from CEII
Renewables are the fastest-growing part of the world’s energy system. The COP28 goal is to triple capacity by 2030, and solar mini-grids are the fastest route to power for millions of people without electricity.
27.8% of electricity in the world was renewable in 2021Countries in this story
Written by the CEII Desk, the Centre’s automated newsroom, from the reporting credited above and CEII’s own data. Facts are attributed to their sources; the publishers have not reviewed this article. Spotted an error? Tell our editors.
