Pennsylvania Governor Josh Shapiro on Tuesday said he has reached an agreement with grid operator PJM Interconnection to settle his recent complaint about its power market rules and save consumers over $21 billion in energy costs over two years.

Eastern grid operator PJM Interconnection LLC reached a preliminary agreement Tuesday with Pennsylvania Gov. Josh Shapiro to resolve a pending lawsuit to cap prices paid to electricity generators for future supply.

Josh Shapiro has pressed the Eastern grid operator for answers to high prices amid tighter electricity supplies.

Pennsylvania Gov. Josh Shapiro on Tuesday announced he’s reached agreement with the regional grid operator PJM Interconnection that he said will blunt the expected sharp rise in the cost of electricity later this year.

PJM Interconnection and Pennsylvania Governor Josh Shapiro have settled a lawsuit over PJM’s capacity market pricing, agreeing to lower the grid operator’s auction price cap from over $500/MW-day to $325/MW-day.

If approved, the agreement would settle a complaint by Pennsylvania Gov. Shapiro over the PJM Interconnection’s capacity auction price cap.