A 2027 U.S.–China conflict with Australia aligned to the U.S. China trade stops immediately, Taiwan exports are slowed/limited, and China launches large‑scale cyber disruption in waves. Planning scenario, not a forecast. No end date is set.
The fleet that keeps running is already built. EIA preliminary 2024 generation was 4.30 trillion kilowatthours. Natural gas was 43 percent, renewables were 23 percent, nuclear was 18 percent, and coal was 15 percent. Petroleum was 0.4 percent. A China trade stop does not switch those plants off. The United States is a net exporter of natural gas, so the largest fuel share is not a Chinese fuel cargo.
What stops is the China slice of equipment, not North American transformer supply. In 2024, U.S. imports of liquid-dielectric transformers above 10,000 kVA were $2,978,309.17 thousand. Mexico was $708,092.17 thousand. Calculated from those two printed values, Mexico was 23.8 percent of the value. Korea was $358,442.80 thousand. Calculated the same way, Korea was 12.0 percent. China was $82,867.24 thousand and 72 items, against a world quantity of 4,271 items. Calculated from the dollars, China was 2.8 percent of the value. Calculated from the items, China was 1.7 percent of the count.
No partner on the fetched transformer page is named Taiwan, Chinese Taipei, or 158. WITS prints Other Asia, nes at $151,622.89 thousand and 306 items. Calculated from the dollars, Other Asia, nes was 5.1 percent of 2024 U.S. imports above 10,000 kVA. Other Asia, nes is not Taiwan. Continuing suppliers already printed are Mexico at 23.8 percent and Korea at 12.0 percent. A foundry-revenue share is not used as the grid figure.
Static converters, the basket that contains inverters and rectifiers, are a separate and larger China exposure. 2024 imports were $17,447,188.77 thousand. China was $2,879,341.98 thousand. Calculated from those values, China was 16.5 percent. Mexico was $2,506,219.59 thousand. Calculated the same way, Mexico was 14.4 percent. Other Asia, nes was $1,053,947.87 thousand. Calculated the same way, Other Asia, nes was 6.0 percent. Wood Mackenzie counted 536 GWac of global PV inverter shipments in 2023, with nine of the top 10 vendors headquartered in China and Huawei plus Sungrow above half the market. That is a global shipment ranking, not the U.S. import share.
The binding physical constraint is time, and it predates the scenario. DOE reports that distribution-transformer orders which took two to four months now take 22 to 33 months, a 443 percent increase from 2020 to 2022, and that DOE identified over 80,000 distribution-transformer varieties. The short end of the DOE band is 22 months. A separate DOE page says imports supply 80 percent of U.S. power transformers and 50 percent of distribution transformers. That 80 percent is all foreign origins, not China. The 2024 China value share above is 2.8 percent.
The cash register behind the wires is large enough to underwrite. EIA counted 163,741,126 ultimate customers in 2024, of which 1,115,974 were industrial. Retail revenue was 514,396 million dollars, including 84,095 million dollars from industrial customers. Sales to ultimate customers were 3,975,381,832 megawatthours, of which industrial sales were 1,034,584,190 megawatthours.
The 0-3 month cost analog is hours, not a year-over-year peak. In February 2021, wholesale prices held at or near the $9,000/MWh ERCOT price cap for approximately 77 hours. The forecast mismatch grew to at least 30,000 megawatts on February 15. The same month, the average industrial bill rose from $1,976 to $3,385, a 71% increase, while the average residential price was only 7% higher because most households were on fixed-rate plans. Industrial sales were down 24%.
Cyber is not hypothetical for this sector. The February 2024 joint advisory, co-authored by the Department of Energy, says PRC actors compromised communications, energy, transportation, and water entities and were positioning for disruptive attacks in a crisis. CISA also states that Presidential Policy Directive 21 treats energy as uniquely critical because it provides an enabling function across critical infrastructure, and that the energy infrastructure is divided into electricity, oil, and natural gas. Bulk power is the week-1 path in this planning model. Dealer-style enterprise billing systems are a later enterprise wave. Line contractors are the broad later wave.
A China stop removes the China row, not the fleet and not the main transformer suppliers. On liquid-dielectric transformers above 10,000 kVA, China was 2.8 percent of 2024 import value and 72 of 4,271 items. Mexico was 23.8 percent and Korea was 12.0 percent. Plants that are already synchronized, including the 43 percent gas share, the 18 percent nuclear share, and the 15 percent coal share, keep generating.
The Taiwan path is not the Other Asia, nes row. On the same above-10,000-kVA basket, Other Asia, nes was 5.1 percent of value and 306 items, and that partner is not named Taiwan. On static converters, Other Asia, nes was 6.0 percent of value and China was 16.5 percent. The UN page says code 490 is how Taiwan is classified and that other unspecified Asian territories could be included, and this report does not adopt that code as the Taiwan line. No fetched page prints the share of chips inside a U.S. protection relay. Mexico and Korea remain the continuing large-transformer suppliers.
Grain-oriented electrical steel is a domestic choke point that is not Chinese production. The Section 232 report says AK Steel, a Cleveland-Cliffs subsidiary, was the sole U.S. producer, at plants in Zanesville, Ohio, and Butler, Pennsylvania, and that GOES was about 25 percent of transformer production cost in the Department survey. Laminations sourced by surveyed firms were 88 percent imported in 2019, and over 95 percent of those imports came from Canada and Mexico. The report says neither Canada nor Mexico produces GOES, Japan was the leading source for them, and they also import some GOES from China and Russia. A China share of that GOES was not printed.
Replacement time is already longer than a quarter. Distribution orders moved from two to four months to 22 to 33 months between 2020 and 2022. Another DOE sentence on the same page says lead times moved from three to six months in 2019 to 12 to 30 months in 2023. A 2026 DOE page says some transformers have seen price increases of 4 to 9 times in the last five years, and lead times of two or more years. Those ranges are the long band. They are not a 90-day price print.
The short-horizon failure mode is a megawatt gap, observed in February 2021. ERCOT serves 26 million customers, about 75 percent of Texas territory and 90 percent of the state's electric load. Net generation fell below the day-ahead forecast after midnight on February 15, and the gap reached at least 30,000 megawatts that day. Prices held near the $9,000/MWh cap for approximately 77 hours. That is the 0-3 month analog for a system that is short of available generation, whether the cause is weather, a fuel trip, or a cyber disruption of operations.
Week-1 cyber risk is the energy sector itself. The joint advisory says PRC actors had compromised energy-sector entities and shifted from espionage toward pre-positioning for disruptive attacks. The wave tags below assign bulk power, transmission, distribution operations, gas supply to power stations, wholesale operators, and ports to Wave 1. They assign transformer and inverter suppliers and retail billing to Wave 2, and line crews to Wave 3. Those tags are the planning model, not a count of intrusions.
Short-horizon price analog, measured in hours: wholesale prices held at or near the $9,000/MWh ERCOT price cap for approximately 77 hours in February 2021. The 2020 average was $22 per megawatthour. This is not the year-over-year equipment inflation.
Short-horizon bill analog, same month: the average industrial bill showed a 71% increase and industrial sales were down 24%. The residential price was only 7% higher. The megawatt analog in the same episode was at least 30,000 megawatts.
No fetched series prints a U.S. transformer price index for a single quarter inside this band. The equipment fact that binds this band is that a new distribution order still sits in the 22 to 33 month queue, so the cost of a failure is lost load and substitute workarounds rather than a delivered invoice. The February industrial bill shock remains the cash analog for repeated scarcity pricing.
Long-band equipment analog: distribution lead times rose 443 percent, from two to four months to 22 to 33 months. DOE describes some transformer prices as 4 to 9 times higher over five years, with lead times of two or more years. The short end of the DOE band is 22 months.
Week 1 is the energy sector and the ports that move its heavy equipment. The joint advisory says energy was among the sectors PRC actors compromised while pre-positioning for a crisis. CISA calls energy uniquely critical because it enables other sectors and splits it into electricity, oil, and natural gas. Bulk generation, transmission, distribution operations, gas supply to power stations, wholesale operators, and ports are Wave 1 in this plan. Households and industrial load are Wave 1 indirect.
Wave 2 is the enterprise supply chain around the grid: transformer factories, inverter vendors, spare-part systems, and retail billing platforms. Losing a China purchase order is a trade effect. A direct hit on the vendor's order system is the cyber tag.
Wave 3 is the broad set of line crews and small contractors. Their outage consequence is slower restoration. They are not the week-1 path that sheds at least 30,000 megawatts.
origin sharepercent
Mexico was 23.8 percent
WITSKorea was 12.0 percent
WITSChina was 2.8 percent
WITSOther Asia, nes was 5.1 percent
WITSinverter sharepercent
China was 16.5 percent
WITSMexico was 14.4 percent
WITSOther Asia, nes was 6.0 percent
WITSchina item sharepercent
China was 1.7 percent
WITSwholesale priceUSD per megawatthour
the $9,000/MWh ERCOT price cap
EIAbill movepercent
a 71% increase
EIAonly 7% higher
EIAdown 24%
EIAshort megawattsmegawatts
at least 30,000 megawatts
EIAlead time increasepercent
443 percent
DOEcustomerscustomers
163,741,126 ultimate customers
EIAmillion dollarsmillion dollars
514,396 million
EIAgeneration sharepercent
Natural gas was 43 percent
EIAnuclear was 18 percent
EIAcoal was 15 percent
EIAimport dependencepercent
80 percent of U.S. power transformers
DOE50 percent of distribution transformers
DOEhourshours
approximately 77 hours
EIAmonthsmonths
The short end of the DOE band is 22 months
DOEList on-site spares against the varieties actually in service. DOE's count of over 80,000 distribution-transformer varieties is the reason a generic spare count is not a plan. Confirm which open orders are China, which are Mexico or Korea, and which are Other Asia, nes.
Put bulk-power and market operations on the week-1 cyber list. The joint advisory names energy as a sector already compromised by PRC actors pre-positioning for a crisis. Separate that list from billing systems and from contractor email.
Re-cut capital projects whose in-service date assumes a distribution transformer inside a quarter. The observed band is 22 to 33 months. Freeze designs toward fewer varieties, which is the interoperability problem DOE convened the industry to reduce.
Stress industrial contracts against a month that looks like February 2021, when industrial sales were down 24% and the average industrial bill showed a 71% increase, while wholesale prices sat near the cap for approximately 77 hours.
Qualify a non-China manufacturing slot for the next large unit. The 2024 book already shows Mexico at 23.8 percent and Korea at 12.0 percent of value above 10,000 kVA. Ask the core supplier where the GOES was melted, because the Section 232 report says Canadian and Mexican core makers import some GOES from China.
Price a refurbishment path. DOE's estimate is a 10 to 40 percent saving versus new. It is not a promise of capacity.
Quoted distribution-transformer lead time. Act when a quoted distribution-transformer lead time exceeds 22 months. The short end of the DOE band is 22 months, inside the reported move to 22 to 33 months. The 22-month line is a planning line set against that print, not a tariff covenant.
Real-time wholesale price. Act when a real-time wholesale price reaches the $9,000/MWh level that ERCOT prices held for approximately 77 hours in February 2021. This is a planning line set against that analog. It is not a claim that the cap in force during the scenario is $9,000.
China share of imports above 10,000 kVA. Act when the China share of liquid-dielectric transformer imports above 10,000 kVA, calculated the same way as 82,867.24 divided by 2,978,309.17, prints above 2.8 percent. China was 2.8 percent in 2024. The line is a planning line set against that baseline, not a customs rule.
Other Asia, nes value above 10,000 kVA. Do not act on Other Asia, nes as if it were Taiwan. The partner-158 page returned no data row, and the partner-ALL page does not name Taiwan. Other Asia, nes was 5.1 percent is a residual partner share, not a Taiwan share. Act on the China row instead, against China was 2.8 percent. Mexico at 23.8 percent and Korea at 12.0 percent are the continuing suppliers. The line is a planning line, not a treaty threshold.
Residential and industrial retail price move. Act when a monthly residential average price is more than 7 percent above the prior year's same month, the February 2021 shielded print, or when an industrial bill comparison reaches a 71% increase. Both lines are planning lines set against the EIA month, not rate-case triggers. Only 7% higher was the residential analog. A 71% increase was the industrial analog.
Keep the gas, nuclear, and coal fleet available. Those shares are 43, 18, and 15 percent. The China stop does not fuel them.
Pre-write the load-shed and scarcity-pricing playbook against a gap on the order of at least 30,000 megawatts and a cap episode lasting approximately 77 hours.
Hunt energy networks for pre-positioned access, as the joint advisory describes, before a crisis.
Standardize the next purchase toward fewer than the 80,000 varieties DOE counted.
Treat 22 months as the planning floor for a new distribution unit.
Match mutual-aid inventory to nameplate, not to a count of spares.
Shift the China 2.8 percent row onto Mexico, Korea, or domestic slots, and ask where the GOES in a North American core was made.
Split static-converter coverage from transformer coverage. China was 16.5 percent of converter value, not 2.8 percent.
Get a refurbishment quote against the 10 to 40 percent saving DOE describes.
wits.worldbank.orgwits.worldbank.orgfederalregister.govenergy.gov
Reprice interruptible load against a month in which industrial sales were down 24% and the average bill showed a 71% increase.
Do not assume the residential shield, only 7% higher, applies to a dynamic industrial contract.
Keep a manual billing path for a book of 514,396 million dollars. A CIS outage is Wave 2, not the breaker.
Identify which customers are fixed-rate. Those accounts were the ones whose price was only 7% higher in the analog.
Quoted distribution-transformer lead time, months The baseline band is 22 to 33 months. The short end of the DOE band is 22 months. A quote inside the old two-to-four-month band would mean the shortage had eased. A quote beyond 22 months means the war scenario is landing on an already broken queue.
Real-time wholesale price versus the February 2021 cap analog Prices held at or near the $9,000/MWh ERCOT price cap for approximately 77 hours. Crossing that analog level is the short-horizon stress flag. It is not a statement of the current cap.
China and Other Asia, nes shares of imports above 10,000 kVA The 2024 calculated baselines are China was 2.8 percent and Other Asia, nes was 5.1 percent. Mexico was 23.8 percent. A weekly customs proxy that moves the China row is the trade tripwire. Code 490 is not that tripwire.
Industrial sales and average industrial price February 2021 industrial sales were down 24% and the average industrial bill showed a 71% increase. Those are the large-customer early warnings. Residential prices moved only 7% higher in that month.
Decision-changing limits. China was 2.8 percent of 2024 U.S. imports of liquid-dielectric transformers above 10,000 kVA. That basket is wider than the Section 232 large-power-transformer definition of above 100 MVA, where 2019 import penetration was over 82 percent and China was not a top-five source. DOE's statement that imports supply 80 percent of U.S. power transformers is a third basket. None of the three is a China share. The 82 percent figure is not the war loss.
Other Asia, nes is not Taiwan. The UN page says code 490 is how Taiwan, Province of China, is classified and that unspecified Asian territories could be included, and this report does not use that label as the import share. Calculated residual shares are Other Asia, nes was 5.1 percent on transformers above 10,000 kVA and Other Asia, nes was 6.0 percent on static converters. They are not a measured share of chips inside a relay. No such content share was found on the pages fetched.
The CISA energy-sector page still prints approximately 48 percent coal, 22 percent natural gas, 20 percent nuclear, and about 1,075 gigawatts, plus more than 6,413 power plants and 3,273 traditional electric utilities. Those figures are what that page prints. The planning fuel baseline is the EIA 2024 preliminary mix, with natural gas at 43 percent and coal at 15 percent. The private-ownership sentence on the CISA page, more than 80 percent, is used. The old fuel mix is not.
Calculated figures in this report use only values printed on the fetched WITS pages. Mexico was 23.8 percent is 708,092.17 divided by 2,978,309.17, rounded to one decimal. China was 2.8 percent, Korea was 12.0 percent, and Other Asia, nes was 5.1 percent use the same denominator. China was 16.5 percent, Mexico was 14.4 percent, and Other Asia, nes was 6.0 percent use 17,447,188.77 as the static-converter denominator. China was 1.7 percent of the item count is 72 divided by 4,271. HS 850440 is static converters, not a pure solar-inverter census. Wood Mackenzie's headline that China accounted for half of global inverter shipments is demand tied to China, and this report does not use it as U.S. content.
The $9,000 cap, the 77 hours, the 71% increase, the only 7% higher residential print, and the down 24% industrial sales print are February 2021 Texas facts. They are the short-horizon analog. They are not a national 2024 price index and not a 2027 tariff. The 443 percent lead-time increase is the multi-year equipment analog. The 27-day cash buffer is a 2015 all-industry median. Tripwires at 22 months, $9,000, 2.8 percent, $151,622.89 thousand, 7 percent, and 71 percent are planning lines set against those baselines.
A quantified share of U.S. power-plant uranium, distribution-transformer units, or switchgear imported from China or Taiwan was not on the pages fetched. Switchgear is inside the DOE discussion of grid equipment lead times and is not given its own import table here. The Section 232 statement that Canada and Mexico import some GOES from China has no percentage. Those are limits, not zeros.
| Node | Primary impact | Time horizon | Cyber wave | Evidence |
|---|---|---|---|---|
| Bulk-power generation | Gas, nuclear, and coal plants already on the system keep generating when a China cargo stops. | 0-3 months | Wave 1 (direct) | eia.gov; cisa.gov |
| Transmission operators | A failed large transformer or a control outage removes transfer capacity for longer than a storm. | 1-12 months | Wave 1 (direct) | federalregister.gov; energy.gov |
| Distribution utilities | Repairs and new connections wait on distribution transformers with multi-year lead times. | 1-12 months | Wave 1 (direct) | energy.gov |
| Wholesale market operators | Wholesale prices can lock at a cap within hours when generation falls short of forecast. | 0-3 months | Wave 1 (direct) | eia.gov |
| Gas supply to power stations | Domestic gas supports the largest fuel share, and a fuel failure still drops megawatts. | 0-3 months | Wave 1 (direct) | eia.gov; cisa.gov |
| Large industrial customers | Industrial bills and sales move in the same month wholesale prices spike. | 0-3 months | Wave 1 (indirect) | eia.gov |
| Power-transformer suppliers | Mexico, Korea, and other non-China plants still ship most units above 10,000 kVA. | 1-12 months | Wave 2 (direct) | worldbank.org |
| Inverter and static-converter suppliers | Static converters are the electronics exposure, and China is not the majority of U.S. import value. | 1-12 months | Wave 2 (direct) | worldbank.org; woodmac.com |
| Equipment spares and mutual aid | Spares and mutual aid are the stock that can move before a new factory slot. | 0-12 months | Wave 2 (indirect) | energy.gov |
| Heavy-haul and port logistics | Project cargo stops if the port or the heavy-haul leg stops. | 0-3 months | Wave 1 (direct) | energy.gov |
| Retail suppliers and billing | Billing platforms are an enterprise outage, separate from physical dispatch. | 0-12 months | Wave 2 (direct) | eia.gov |
| Line crews and electrical contractors | Crews are a later distributed target and cannot manufacture a transformer. | 1-12 months | Wave 3 (direct) | energy.gov; jpmorganchase.com |
| Household and small-business customers | Customer accounts go dark because an upstream node failed. | 0-3 months | Wave 1 (indirect) | eia.gov |