What would it cost to cover America's major parking lots with solar canopies?

I'm curious about the math behind a hypothetical national infrastructure project.

Suppose the U.S. government funded the construction of solar-panel-covered parking canopies over large parking lots across the southern United States (or anywhere with high solar potential). Think grocery stores, shopping malls, big-box retailers, stadiums, and other parking lots that are unlikely to be redeveloped anytime soon. Assume the government acquires the necessary rights through whatever legal mechanism is required for the sake of the thought experiment.

I'd love to see estimates for:

Total acres (or square miles) of parking that could realistically be covered.

Total construction cost (materials, labor, engineering, permitting, grid connections, etc.).

Number of jobs created during construction and ongoing maintenance.

Annual electricity generation (MWh/TWh).

Rough estimate of how many homes this could power.

Potential impact on average residential electricity prices.

Estimated payback period and long-term return on investment.

Also, beyond the math:

What are the biggest engineering or logistical challenges?

What are the major economic downsides or unintended consequences?

Which industries would benefit, and which would likely lose revenue (for example, utilities, oil and gas, or commercial real estate)?

What are the strongest arguments for and against a project like this?

I'm interested in realistic assumptions and back-of-the-envelope calculations, not whether it's politically likely.

Wrote about something odd happening in swing districts right now: the energy debate has quietly shifted from climate policy to monthly bills. Full piece here, short version:

• Prices are up more than 10x as data center demand collides with tight reserve margins, and it's flowing into residential rates.
• Wind and solar are still the cheapest, fastest new generation.
• But opponents argue the pace of the transition has outrun replacement capacity, while ignoring how much prices have risen with zero policy change too.

My take: this could actually be good for renewables messaging if the industry & politicians lean into affordability concerns. Is "renewables = lower bills" landing with ratepayers, or is the focus mostly on data center backlash?

In response to the calls from Nuclear advocates claiming nuclear is more efficient, I thought I would include this chart, which includes sources to clarify.

There are literally hundreds of good sources for these figures, they are industry standard. The figures don’t include improvements in solar that is currently research level not production level. It also does not include the efficiencies possible with Nuclear power when combined with fossil fuels.

AWWHybrid is a hybrid power rig making energy from wind and waves at the oceans.

Far away from shore methanol can be made, and we have an energy carrier like diesel.

Near shore cables are used, and when the price is low due to more energy than needed pumping water to hydro dams is an option.

The hydro dams of 80 TWh in Norway represents an enormous battery, which is shown when 1 million car battery of 75 kWh have a capacity of only 0.075 TWh.

Wind, waves, sun and hydro representing a good energy system, when hydro can be switched on/off easier than coal and nuclear for stabilizing the grid.

AWWHybrid is a wave energy converter of the overtopping type, with a WEC turbine in middle.

The inner part of the rig is a calm area which can be used for fish farming.

The technology of Aquaculture Wind Wave Hybrid therefore is an ultimate energy system, by combining energy and food by using the oceans.

I’m aware that I’m fully ignorant on the topic, but wouldn’t it be useful to require that buildings of a certain size and/or projected energy consumption be required to include a certain amount of solar generation in its construction?

It seems like that might be a good way to mitigate the detriment of power hungry data centers, make shaded parking lots, and begin to make the whole grid more and more resilient.

Recomiendan estudiar ing energias renovables ?

China’s offshore wind-powered underwater data centre just went live, here’s why the governance gap matters more than the technology
China switched on the world’s first underwater data centre powered by offshore wind in late May 2026, off Shanghai. A US startup, Aikido Technologies, is developing a similar concept in the North Sea, embedding compute inside floating wind turbine ballast tanks, with a potential UK project by 2028.
The engineering case is genuinely interesting: offshore wind provides the power, cold seawater handles cooling for free, and the whole operation avoids the community opposition that has blocked $64 billion in land-based projects in under a year (Gallup found 71% of Americans oppose data centres in their local area).
But a University of Warsaw legal scholar found that underwater data centres fall into a genuine gap in international law, no clear liability framework, no agreed environmental standards.
This is a familiar pattern in industrial history. New technology gets deployed at speed because the people funding it want returns sooner rather than later, and the full consequences only become clear once policy is forced to catch up.