MISO predicts it will have anywhere from 383 GW to 454 GW of installed capacity its footprint by 2045, according to a preliminary version of its 20-year planning futures.

MISO has slashed earlier renewable energy estimates and boosted natural gas contributions in its transmission planning futures in a rethink brought on by the Trump administration’s One Big Beautiful Bill Act.

MISO said its set of 20-year transmission planning futures must be further fine-tuned after the Trump administration’s repeal of tax credits for renewable generation.

MISO CEO John Bear put a positive spin on the grid operator making do with little cushion in its supply.

MISO is on its way to installing a fourth, 20-year future to inform transmission planning in case supply chains remain unsteady.

Calls to consider a dissolved or weakened Inflation Reduction Act alongside appeals for stronger MISO South planning epitomized the tough situation and unsteady political climate MISO finds itself in as it tries to establish transmission planning expectations.

MISO expects the revamp of its transmission planning futures will be done by November and will yield an extra scenario dedicated to slow-moving generation construction.

Board members have directed MISO to seek guidance on the role of the Independent Market Monitor in transmission planning following a year of IMM David Patton criticizing MISO’s nearly $22-billion long-range transmission portfolio.

MISO further embraced the industry’s move to chance-based transmission planning by hosting a Probabilistic Planning Symposium at its headquarters.