Observed arrival · 2026-09-17
kWh Index — the cost of running things
A state-by-state energy-cost index that turns electricity rates into running costs for heaters, water heaters, solar systems, batteries, and electric cars.
Field notes
The index converts published energy rates and equipment ratings into comparable operating-cost figures, rather than relying on the consumption claims printed on product boxes. Its coverage includes monthly state averages, derived rates for 1,414 utilities, and 929 Texas retail offers, while equipment data spans 45,888 models across 10 categories. Heat-pump entries include performance at 5 °F, and home-charging entries express electricity cost per 100 miles.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue