The Electric Grid

Electricity powers shelters, transportation, communication, and emergency services.

Modern civilization is heavily reliant on the grid to deliver that electricity.

When blackouts happen during high demand, problems cascade.

In February 2021, Winter Storm Uri overwhelmed the Texas grid. The result is shown on the right →

Nations that consume more electricity per capita tend to have dramatically higher GDP per capita.

This isn't coincidence, electricity enables industrial output, technology, and services that drive economic growth.

This relationship is roughly linear, suggesting electricity access is a prerequisite for prosperity, not a byproduct.

The more energy generated, the more electric power there is to develop technological, economic, industrial, and military capacity.

From 1900 to 2000 the United States continuously grew total electricity generated.

Around the early 2000s, that changed. In a later section we will further explore just how and why this happened.

From 2000–2024, the amount of electricity generated in the U.S. stagnated around 4,000–4,200 TWh per year.

Efficiency gains have masked the lack of net growth.

Rather than expanding for future needs, power plants were retired (taken off line) as fast as new ones were built.

In contrast, China's electricity generation has exploded over 600% since 2000 to ~10,000 TWh per year in 2024, with build-out rates only accelerating to fuel economic and technological development.

China generated more electricity in 2024 than the U.S., EU, and India combined.

The U.S. grid delivers ~1.3 TW of capacity to 340M+ Americans, but much of the infrastructure dates to the 1960s–70s.

Aging transmission lines, outdated transformers, and growing demand from electrification and AI are pushing the system to its limits.

The average age of a U.S. power transformer is over 40 years, past its designed lifespan.

On April 8th, 2025, President Trump issued Executive Order 14262:

"Strengthening the Reliability and Security of the United States Electrical Grid" aimed at bolstering resilience amid surging AI-driven demand.

What It Is: Electricity is the flow of electric charge (electrons) through conductive material that can be utilized to do work.

How It Works: Electricity delivers energy to power light bulbs, drive motors, provide heating and cooling, run data centers, and more.

How It Is Measured: In watts (W) for power or watt-hours (Wh) for energy used over time. Voltage (V) measures the electric "pressure" like water pressure in a pipe.

Fuel-Agnostic: Electricity can come from many sources but varies in method, reliability, and efficiency depending on the source and system.

Most electrical generation today begins with mechanical motion. Steam, water, or wind turns a turbine, rotating wire coils through a magnetic field to create electric current.

Coal and gas plants burn fossil fuels to heat water into steam. Nuclear plants split atoms to generate steam.

Hydro uses flowing water to spin turbines. Wind uses moving air.

Solar power is unique because it generates electricity without turbines or generators.

Photons from sunlight strike silicon semiconductors and knock electrons free, creating direct current (DC). An inverter converts this to alternating current (AC) for home and grid use.

No moving parts, no fuel, no emissions during operation.

The U.S. generation mix has shifted dramatically over time.

Coal dominated from the early 1900s until the 2000s, but has been in steady decline since 2008. Hydro power has been relatively stable and modest for the last 50 years.

Nuclear rose fast in the 70s and 80s and has since plateaued with no new reactors built for decades.

Today, natural gas reigns supreme driven by innovations in hydraulic fracturing. Gas produces twice as much electricity in the U.S. as any other source.

Alongside gas, wind and solar are the fastest growing net new generation capacity.

The entire grid needs to be built to handle the highest load on the coldest and hottest day of the year.

Those relatively rare moments are called peak load, or in general the demand pattern is called peaking.

Most of the time, we already have far more power than we need to cover our base load of average demand. Especially in the spring and fall.

Until batteries can store massive amounts of power long term, the entire grid needs to support and survive peak loads. When the grid hits a supply-demand mismatch, critical problems arise.

The grid must balance electricity supply and demand in real time, every second of every day.

The AC frequency (60 Hz in the U.S.) is the grid's heartbeat. When supply and demand are balanced, frequency holds steady.

If frequency drifts too far up or down, equipment disconnects automatically, triggering cascading blackouts.

Toggle the supply and demand below to see what will happen to frequency and the grid.

The U.S. and Canada share the North American electric grid, which, in the U.S., is divided into three major regional grids known as interconnections.

High-voltage direct current (HVDC) lines connect these regions to balance supply and demand, but there are relatively few of them.

This fragmented structure, with only about 1.3 GW of transfer capacity between East and West, makes it harder to manage demand surges or share cheaper power between regions.

Aging and limited interconnections further strain system reliability.

Fragmented grid management and regulatory layers have created a multi-agency process that takes years for new projects to navigate.

There are multiple authorities, agencies, and operators spread across different hierarchies and functions.

No single authority can drive national grid modernization. A transmission line crossing state borders can require permits from dozens of agencies.

Over 100 years, the total amount of new grid power capacity increased 900% every ~30 years.

In the last 25 years, net electric power on the grid has increased by only 30%.

From the late 2000s through 2024, total net electric power generation on the grid stagnated. Large amounts of new power were added (gas, solar, wind), but coal plants were decommissioned just as fast.

The ASCE estimates a $578B investment gap to modernize the grid through just 2026.

70% of transformers and transmission lines are 25+ years old. 60% of local distribution lines are 40+ years old. 60% of circuit breakers are 30+ years old.

Aging equipment increases the likelihood and severity of blackouts and critical component failures.

More than 50% of all energy consumed to generate electricity is wasted in conversion losses from fuel to electricity.

This is primarily due to the thermodynamic limits of thermal power plants (coal, gas, nuclear). Further losses occur in transmission and distribution.

For every 100 units of fuel, only about 33 reach your outlet.

Major weather events pose the greatest risk to reliability due to increase in frequency, footprint, and duration.

In Louisiana, Hurricane Katrina destroyed more than 90,000 wood utility poles.

From 2020-2024, of the 62 large transmission outage events, 61 were weather related.

For the first time in decades, the U.S. is projected to have a significant increase in demand for electricity.

AI-fueled data centers, electric vehicles, and broad industrial electrification require a significantly larger and more dynamic grid.

Past 15 years: +285 TWh. Next 15 years: need +1,955 TWh. That is triple the forecast from just 2 years ago.

U.S. electricity prices have risen steadily for 50 years, with a sharp acceleration post-2020.

Residential rates have climbed to an average of 16.6 cents/kWh in 2024, up 30% from 2020.

Adjusting for inflation, real electricity costs had been declining for decades, until the post-COVID reversal erased 20 years of progress.

Natural gas is the primary "bridge fuel" while renewables scale, but the supply chain for gas turbines is severely constrained.

The global order backlog for large gas turbines has stretched to 3-4 years as utilities and data center operators scramble to secure dispatchable power.

GE Vernova, Siemens Energy, and Mitsubishi control 90%+ of the global gas turbine market, a critical supply concentration risk.

Large power transformers (LPTs) are the backbone of the transmission grid, and there aren't enough to replace aging units or support expansion.

Lead times for large power transformers have extended to 2-4 years. Each unit costs $3-10M and weighs up to 400 tons.

The U.S. imports ~80% of its large power transformers, primarily from South Korea, Germany, and Mexico. Domestic production capacity is severely limited.

Before any new power source can connect to the grid, it must go through an interconnection study process.

This queue has become a massive bottleneck: about 2,300 GW of generation and storage capacity are waiting, nearly 2x the entire existing U.S. grid capacity.

Only about 13% of projects that entered the queue from 2000–2019 were ever built. The average wait time has grown to 5+ years.

These eight challenges don't exist in isolation, they reinforce each other in a vicious cycle.

Aging infrastructure increases weather vulnerability. Queue delays slow new capacity. Rising demand widens the gap. Supply chain bottlenecks make everything slower and more expensive.

Hover over any challenge to see how it connects to the others. The grid crisis is a systems problem, not eight separate issues.

In 2024, utilities and developers added a record ~46 GW of new utility-scale power capacity, dominated by solar (62%) and battery storage (26%).

If interconnection queue reforms succeed, the pipeline of approved projects could accelerate dramatically.

The U.S. needs to triple its annual build rate to meet 2030-2040 demand projections.

Solar panel costs have dropped ~90% in the last 15 years, making solar the cheapest source of new electricity in most of the world.

This "learning curve" shows no signs of stopping, every doubling of installed capacity reduces costs by another ~20%.

Solar became cheaper than new coal in 2015 and cheaper than new gas in 2019.

Global solar capacity reached ~1,866 GW in 2024, with China installing more solar in one year than the U.S. has total.

China manufactures 80%+ of the world's solar panels, creating significant supply chain concentration risk.

The U.S. is responding with domestic manufacturing incentives under the IRA, but remains years behind in scale.

IEA forecasts consistently underestimated solar growth by 5-10x, reality is outpacing every prediction.

Solar accounts for about 7% of U.S. electricity generation today, up from virtually nothing a decade ago.

Solar was the #1 source of new electricity capacity added in 2024, comprising over 60% of all new utility-scale additions.

At current growth rates, solar could reach 20-25% of U.S. generation by 2035, but only with massive battery storage to handle intermittency.

U.S. grid-scale battery storage has grown from 1.5 GW in 2020 to over 30 GW in 2025, a 20x increase.

Batteries solve the intermittency problem: they store excess solar during the day and discharge during evening peak demand.

Battery costs have fallen 90% since 2010. At current prices, 4-hour lithium-ion storage is cost-competitive with gas peaker plants.

The U.S. has 94 operating nuclear reactors generating ~19% of electricity, the largest nuclear fleet in the world.

Most were built in the 1970s-80s and are nearing end of life. Life extensions have kept them running, but no new large reactors have been completed since 2023 (Vogtle).

Small Modular Reactors (SMRs) promise factory-built units at lower cost, but commercial deployment remains 5-10 years away.

The Rocky Mountain Institute has identified alternative system technologies that could improve grid efficiency and offset near term load growth.

Power coupling is the co-location of power supply and demand behind-the-meter.

Upgrades to interconnections (more high voltage connections) would help to unlock constraints and offset new demand in the years ahead.

Distributed energy resources like batteries, electric vehicles and residential solar can support grid resilience long term but will require continued build out to reach grid scale impact.

Virtual power plants are modern power plants that use software to (virtually) connect many different types of power plants together.

The U.S. has world-class solar and wind resources, but they're concentrated far from population centers.

The Southwest receives the most intense solar radiation. The Great Plains from Texas to the Dakotas have the strongest winds.

This geographic mismatch is why transmission infrastructure is the key bottleneck, we need thousands of miles of new high-voltage lines to connect supply to demand.

In 2025, the DOE launched Project Genesis, an executive order to use AI to accelerate nuclear energy R&D and grid planning.

AI-driven grid optimization could improve load forecasting, reduce transmission losses, and speed interconnection studies from years to months.

This signals a fundamental shift: the federal government treating grid modernization as a national security priority.

China controls 60-90% of processing for nearly every critical mineral needed for batteries, solar panels, and wind turbines.

From cell manufacturing to cathode materials, graphite processing to lithium refining, China dominates every segment of the battery supply chain.

China's share of NMC battery components ranges from 71% to 96% across all major segments.