A recent report by nonprofit organization Permit Power highlights the potential for significant cost reductions in U.S. rooftop solar systems by streamlining local permitting, inspections, and utility interconnections. The analysis suggests that bringing costs down to around $1 per watt could lead to the installation of an additional 18.2 million home solar systems by 2040 and save households an average of $1,600 annually. This change could also result in $1.2 trillion in long-term savings while alleviating peak electricity demands and curbing rising energy costs.
According to the report, despite recent hardware price drops, residential solar systems in the U.S. remain substantially more expensive than those in Australia and Germany. For instance, a typical 7-kilowatt system can cost about $28,000 in the United States, while similar systems are priced at approximately $4,000 in Australia and $10,000 in Germany. This disparity of $18,000 to $24,000 per project is a key reason why less than 10% of U.S. homes have rooftop solar, compared to one-third of households in Australia.
Permit Power attributes these high costs largely to “soft costs,” which now account for roughly 78% of the overall price of residential solar systems. The organization emphasizes the negative impact of fragmented local regulations, inconsistent inspection practices, and lengthy utility interconnection delays on project completion. They note that each week of permitting delays can increase project cancellation rates by around 10%, which drives up costs. Permitting issues alone contribute approximately $1 per watt, or $6,000 to $7,000, to an average home system’s price.
The report underscores the urgency of implementing changes, especially as utility companies seek to increase rates and many households already struggle with energy affordability. With one in seven U.S. families facing energy poverty, and with the potential expiration of the residential investment tax credit post-2027, the affordability of solar installations could further diminish. Projections suggest that without significant cost reductions, residential installations might decrease by up to 46% by 2030.
Utilizing the National Renewable Energy Laboratory’s dGen model, the report compares a business-as-usual scenario costing $4 per watt to a more optimistic case of $1 per watt, which could be achievable by reducing regulatory hurdles. Under this improved cost structure, the projections show the addition of 18.2 million home solar systems and an increase of 198.1 gigawatts in residential solar capacity by 2040. Households could collectively save around $1.2 trillion over the lifetime of their systems.
If solar projects could reach $1 per watt, the average payback period could drop to under six years by 2040, down from about 13 years currently. Moreover, systems incorporating solar and battery storage would see household electricity bills reduced by approximately 61%. The largest savings would materialize in states with higher energy costs, such as California and New York.
The analysis also points to broader benefits for the electrical grid when solar and storage technologies are integrated. By storing energy generated during the day for use during peak evening demand, residential solar systems could help reduce overall peak demand by around 21 gigawatts by 2040. In California, for example, the adoption of battery storage has surged, with two-thirds of new rooftop systems incorporating this technology. Many Texas households are also increasingly joining virtual power plants that monetize battery contributions.
Permit Power recommends several policy measures aimed at reducing the bureaucratic burden of solar installations rather than simply increasing subsidies. Suggestions include implementing instant online permitting, allowing remote inspections, and ensuring automatic utility approvals for compliant systems. They also advocate for eliminating outdated local regulations that impose unnecessary costs, citing cases where some jurisdictions have successfully reduced permitting times significantly through streamlined processes.
Additionally, the report highlights the need for the solar industry to shift towards low-touch, digital workflows to further cut soft costs, suggesting that adopting technologies like AI could enhance customer acquisition and improve communication about projects.
Case studies from different states illustrate the complexities that currently inflate costs and extend timelines, including Illinois’ reliance on paper submissions and sequential approvals, and New Jersey’s slow, multi-department review processes, which all add complications to solar project implementation.
In conclusion, Permit Power emphasizes that making the U.S. rooftop solar market more efficient could not only lower costs and expand access to renewable energy but also support the entire energy system by reducing peak demand and enabling cleaner energy sources for transportation and home heating. The report advocates for immediate action to dismantle unnecessary administrative barriers that keep solar prices high in the U.S.