Grid Spending Splits Three Ways This Week: Seoul Opens 100 GW, Washington Locks the Supply Chain

South Korea's Ministry of Climate, Energy and Environment said projects already queued for connection get priority, while new applications move to a revised framework from January 2027, according to pv magazine. Parts of Chungcheong reopen too, and east coast restrictions lift in the first half of 2027 when the first phase of an east coast to Singapyeong high-voltage direct current line is finished.

The headline numbers are large. The ministry projects transmission-level renewable hosting capacity rising from 119 GW to 171 GW by 2030 and distribution-level capacity from 84 GW to 110 GW. In Honam alone it sees transmission going from 37 GW to 64 GW and distribution from 18 GW to 30 GW.

None of that arrives without trade-offs. Under the new flexible connection regime, projects may connect beyond a grid section's normal hosting limit and accept curtailment when generation exceeds what the network can carry. The ministry said the change raises the solar connection limit on a distribution line from 14 MW to 16 MW and at a substation from 50 MW to 60 MW, enough for 2.6 GW of additional solar in Honam with no new grid construction.

Storage is the second lever. By 2030 Seoul aims to connect 3 GW of extra solar in saturated areas through batteries on distribution networks and another 1.6 GW through storage at substations. The ministry did not specify the capacity of those batteries.

It also wants its queue back. The ministry said it has already recovered 9 GW of connection rights by auditing solar projects that reserved capacity but were not viable, and expects to recover more than 10 GW in Honam alone by 2030, including from delayed offshore wind. For capacity entering from 2031, rights will be allocated using a 67.2% actual on-time completion rate for renewable projects rather than assuming every project gets built on schedule.

Connection studies change as well. They previously assumed new renewables run after existing fossil fuel plants. They will now assume renewables are dispatched first, a shift the ministry estimates will allow 20 GW of additional renewable capacity nationwide by 2030, including in the southeastern Yeongnam region and northeastern Gangwon province, where coal and LNG plants are concentrated.

Washington moves on equipment, not megawatts

The same week, the United States went after the hardware. On 26 August 2026 President Trump signed an executive order declaring a national emergency to ban or restrict acquisition and installation of high-risk foreign-produced equipment in the electric grid, according to SemiEngineering. It covers generation, transmission and control facilities operating at 69 kilovolts or above: large transformers, grid-tied inverters, circuit breakers, battery energy storage systems, SCADA software and industrial control systems. Residential solar inverters and commercial distribution below 69 kV fall outside it.

No vendor has been named. Restrictions currently sit at broad equipment categories combined with country of origin, and the specifics do not exist until the Department of Energy publishes implementing rules, due 24 December 2026. Those rules may take the form of a prohibited-entity list, a pre-qualified vendor white list, or both.

The definition of a Covered Foreign Entity is broad: any company, national or subsidiary owned by, controlled by, or subject to the jurisdiction of a foreign adversary. It applies to countries under U.S. arms embargoes, including Russia, Iran and North Korea, but China is the practical concern. Western vendors are not automatically clear either, because the order follows the supply chain downward; a U.S. or European manufacturer sourcing chips, communications modules or internal software from a covered jurisdiction may still find its finished product restricted.

Transactions after 26 August 2026 can be restricted, and the Secretary of Energy can require equipment installed before that date to be monitored, disconnected, replaced or removed. Utilities are already pausing procurement with foreign-linked supply chains and pressing vendors for provenance answers during active bids, SemiEngineering reported. The piece cites the International Energy Agency putting China at roughly 80% of world manufacturing in the relevant categories.

The order reaches further than a 2020 predecessor, which focused on hardware provenance and produced a single prohibition action before being suspended and then rescinded in 2021. The 2026 version names inverters, battery storage, control systems and industrial control components alongside their software, firmware, remote-access capabilities and update mechanisms. Moving assembly to another country no longer solves the problem.

Insurance math and a $1.9 billion federal bet

On the private side, the risk is concentrating. Olly Litterick, head of renewables at Tokio Marine GX, told ESS News that co-located solar-plus-storage sites now carry "hundreds of millions of dollars or even billions of dollars of exposure in a single location where multiple insureds share grid connection points." TMGX covers loss of revenue from physical damage, so a failure at one shared export point can hit several insured projects at once. "When the grid goes down due to [a] material damage incident or there's a transformer failure or something of that description, you know, the numbers can be astronomical," he said.

TMGX, launched by Japan's Tokio Marine group in 2025, builds on 20 to 25 years of renewable underwriting at GCube, which Tokio Marine acquired in 2020. Litterick said battery storage is its fastest-growing technology on a compound annual growth basis and that its roughly 8 GW BESS figure refers to insured participation and is "probably slightly outdated" because the book is growing so quickly. Most of it is still in construction, he added, and utility-scale BESS has only been widespread for three to five years, so the claims record remains thin. Thermal runaway stays the main driver of probable maximum loss estimates, and spacing arrangements are central to how the company underwrites projects. Marsh advises insurers to keep sufficient separation between battery modules and critical infrastructure such as site transformers and substations.

Public money is moving in parallel. The Department of Energy put $1.9 billion into 31 projects across 26 states through its SPARK grant program, Canary Media reported on 24 September. Participating utilities pledged $3.35 billion in matching funds, taking total investment to $5.25 billion. Recipients include American Electric Power, CenterPoint Energy, Duke Energy, Eversource Energy, Rocky Mountain Power and PPL Electric Utilities, plus four public power utilities and rural electric cooperatives in Arizona, New Mexico and North Carolina. Much of the money goes to advanced conductors and dynamic line rating, which squeeze capacity out of existing corridors rather than building new towers.

"The experience that will be developed through these grants will be phenomenal," said Julia Selker, executive director of the Working for Advanced Transmission Technologies Coalition. "Not only is each project improving reliability, saving money, and enabling economic development, each will also catalyze innovation across the utility sector."

Demand for that capacity is not in question. U.S. light-duty electric vehicles consumed nearly 14 billion kilowatt-hours in the first half of 2026, more than double the level in the first half of 2023, though growth slowed to 8% over the previous six months from 13% to 24% in recent periods, according to the Energy Information Administration. New electric vehicle sales fell 19% in the first half compared with the second half of 2025 after federal credits expired on 30 September 2025.

Fleet purchases tell a different story. FedEx ordered 2,000 electric trucks from California startup Harbinger, CleanTechnica reported on 30 September. Tesla held an opening ceremony on 26 September for volume production at its Semi factory in Sparks, Nevada, with output reportedly anticipated at 50,000 trucks a year.

For grid planners, the sequencing problem is the same everywhere: connections, storage and equipment rules are being rewritten at once. Seoul's answer is to accept curtailment and lean on batteries. Washington's is to audit the provenance of the hardware itself, with the actual rules still three months away.