The modeled price changes by hour, so shifting flexible use can change the estimated energy cost.
Illustrative curve—not a live rate or proof that a plan is available. household energy timing / working prototype
Save some green,
save the planet.
Run life on greener hours.
Enter a ZIP code for a rough local starting point, compare fixed and flexible pricing, then see when shifting electricity use might help.
Flexible hourly estimate
RIGHT NOW5 PM
red hour
28.1¢per kWh · Illustrative price that changes by hour
Hold flexible, high-energy activities if you can.
Next green hour: 12 AMYour household, sorted by impact
Charge the car24 kWh session
Wait for 3 AMWaiting could save about $4.69.
Run the dryerone electric load
Wait for 3 AMWaiting could save about $0.59.
Use the ovenabout one hour
Use if neededWaiting could save about $0.43.
Run the dishwasherone cycle
Wait for 3 AMWaiting could save about $0.23.
Gaming sessionPC or console · 3 hours
Wait for 3 AMWaiting could save about $0.23.
Run the washerone cycle
Okay nowWaiting could save about $0.10.
Watch TVabout 3 hours
Okay nowWaiting could save about $0.07.
Move through the hours
green below 12.75¢ · orange to 18.70¢ · red aboveCompare plan shapes
Fixed price or flexible timing?
Both examples start from the same 17.0¢ geographic benchmark. The fixed estimate stays flat; the flexible estimate moves around it during the day.
$153.00 for an illustrative 900 kWh month at this rate.
Rough regional starting point; replace it with a comparable bill rate.Who sells what?
Your delivery utility maintains the local wires. In some areas, a separate retail electricity supplier or community aggregation program can sell the energy portion of service. Those household-facing companies are retail suppliers, not wholesalers. Availability and rules vary by location.
Rough ZIP estimate: Green Hours uses only the first ZIP digit to choose a broad regional starting point. It cannot identify your utility, supplier, tariff, taxes, fees, credits, or plan eligibility. The rounded benchmarks are informed by recent U.S. Energy Information Administration delivered residential averages, which can include more than energy supply. The flexible curve is illustrative, and neither card is a quote or an offer. Benchmarks checked July 17, 2026; confirm comparable rates and terms on your bill or with the provider before switching.
Home display feed
Built to leave the browser.
A small JSON endpoint sketches the path to a home dashboard or another always-on display.
Illustrative usage check
Where a sample home used power.
900 kWh across an illustrative 31-day month. These example costs use the same flexible price shape shown in the dashboard.
45% of usage$44.55 sample cost
30% of usage$45.90 sample cost
25% of usage$57.38 sample cost
The sample opportunity: a quarter of this household's usage lands in the most expensive modeled hours. Flexible large loads are the first place to look.
Shifting 10% of red-hour energy to the average green rate could save about $3.26 in this illustrative month. Actual savings depend on the rate, the device, and when the household uses energy.
How this prototype thinks
Price alone is not the decision.
Find the better window
Compare this hour with the lowest price in the next 12 hours.
Estimate the activity
Multiply the price gap by a practical per-use energy estimate.
Color the savings
Green is under 10¢ saved, orange is 10–50¢, red is over 50¢.
Prototype notes
Honest about the edges.
Sample, not live. The flexible hourly chart is an illustrative day scaled around a rough regional benchmark. It is not a live rate, a utility tariff, or a plan offer.
Price, not carbon. Green Hours currently tracks electricity prices, not grid carbon intensity. A cheaper hour is not automatically a cleaner hour.
ZIP is only a starting point. A ZIP code does not prove which utility, supplier, or plan serves a home. Green Hours uses its first digit only to choose a broad regional estimate.
Plan type before timing. A fixed rate stays the same through the day, while a flexible rate can change by hour or time block. Moving a load only changes the modeled cost on a flexible plan.
Compare carefully. Fixed fees, taxes, credits, delivery charges, contract terms, and early-exit rules can matter as much as the advertised cents-per-kWh rate. Confirm them before switching.
Private by default. Saved only in this browser on this device. Nothing is uploaded.