Arizona Public Service

Arizona

22%Low strain

Grid Stress Index · demand vs. 1-yr peak

Arizona's largest utility — desert solar plus gas and the giant Palo Verde nuclear plant, under relentless summer heat.

Grid Stress Index

22%

⚾ Batting average

Current demand as a share of the past year's peak. 95%+ means the grid is near its limit.

Peak Load (7d)

6.8 GW

⚾ Home runs

The biggest single-hour demand spike over the last week.

Clean Generation

20%

⚾ On-base %

Share of generation from wind, solar, hydro, nuclear & geothermal right now.

Fossil Baseline

2.2 GW

⚾ Small ball

Power coming from coal, gas & oil — the grid's heavy lifting when renewables dip.

Demand vs. forecast

last 7 days · GW

Amber = actual demand · blue dashed = day-ahead forecast.

Fuel mix

Jul 4, 2:00 AM ET

What's generating the electricity for this hour.

Natural Gas29%
Battery26%
Coal25%
Wind20%
Other1%
Solar0%

Demand trend

+35% avg demand · 2019–2026

Monthly average demand (amber) with the monthly baseload — the lowest hour of each month (cyan). A rising floor is the signature of always-on data-center load.

Latest demand reading: Jul 4, 2:00 PM ET · 2.0 GW