Electriclty, In The News, Peak Demand, Weather

PJM: Hottest Day of Summer = Peak Demand Alert Across Grid

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Across Much of PJM Network, the hottest temps of Summer are forecasted today, prompting Peak Demand Alert.

Based on current PJM load and weather forecasts, an annual peak day between 3 PM and 6 PM EDT will occur this afternoon, when demand is forecasted to reach 154,258 MW. 

This number is among the highest predicted demand loads this year!

(Last year’s peak demand was approximately 149,000 MW).


If your organization is looking for quick ways to reduce energy usage, consider the following:

  • Reduce non-essential lighting 
  • Modify manufacturing processes 
  • Adjust HVAC equipment 
  • Dial back pumps 
  • Change settings in industrial freezers 

If your operations are flexible, we encourage you to monitor the PJM website tomorrow to aid your business decision.    


What You Need To Know:

What is a coincident peak day?

One of the five highest-demand days (during the summer months) when PJM chooses to measure the peak demand—typically during the hour of the day with the highest demand.

Your average usage/demand during the five peak hours of the summer (measured by PJM on the five coincident peak days) determines what your capacity obligation (i.e., “capacity tag”) will be for the following year—and impacts your overall energy costs.

What can you do?

Having this information and reacting to it may help lower your business’ capacity obligation for next year. Reducing your consumption on those days can mitigate some of the impacts of high real-time and day-ahead prices.



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