Blog
Longer-form writing built on the same data as the rest of the site — buying guides, efficiency deep-dives, and notes on what changes in the datasets.
· Sharon Ben-Moshe · Energy Basics
Warming one bed with an electric blanket all night costs as little as $32.99 a year on its low setting, and just $98.97 a year even on high — at the U.S. average electricity rate of 18.83¢/kWh.…
· Sharon Ben-Moshe · Energy Basics · Air Conditioners
Three ways to cool a room, ranked by what they actually cost at the U.S. average electricity rate (18.83¢/kWh, 8 hours a day): a ceiling fan runs $8.25–$32.99 a year, a box fan $21.99–$41.24, and a…
· Sharon Ben-Moshe · Energy Basics · Computer Monitors
A gaming PC running a typical 4-hour evening session at 350 W costs $96.22 a year at the U.S. average electricity rate — more than eleven times the $8.49 a median certified computer monitor costs to…
· Sharon Ben-Moshe · Energy Basics
A Wi-Fi router running 24/7, 365 days a year, costs between $13.20 and $41.24 annually at the U.S. average electricity rate — even the high end, a mesh system plus modem at 25 W, comes in at about…
· Sharon Ben-Moshe · Energy Basics
Every number on WattCost comes from one formula: certified annual kWh × state electricity rate (¢/kWh) ÷ 100 = annual cost. No weighting, no adjustments, no proprietary scoring — across 9,441…
· Sharon Ben-Moshe · Energy Basics
Across WattCost's 11 certified categories, the gap between the cheapest and priciest model to run — at the same U.S. average electricity rate — ranges from $30 a year (dishwashers) to $509 a year…
· Sharon Ben-Moshe · Freezers
The median certified freezer costs $78.71 a year to run at the U.S. average electricity rate. Move that exact same machine to North Dakota, the cheapest state, and it costs $51.62. Move it to Hawaii,…
· Sharon Ben-Moshe · Energy Basics
Not every appliance's electric bill moves with the calendar. WattCost groups every certified category into a duty class — and that classification predicts almost exactly which costs swing hard by…
· Sharon Ben-Moshe · Computer Monitors
A typical home-office desk — one PC, one monitor, one Wi-Fi router — runs somewhere between $95 and $220 a year in electricity at the U.S. average rate, and the PC accounts for nearly all of the…
· Sharon Ben-Moshe · Air Conditioners
A certified room air conditioner costs a median of $100.16 a year to run over its standard 750-hour cooling season. A ceiling fan run for that same 750 hours costs about $4.94. The fan itself is…
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