Power Smart Pricing varies every hour. Use the actual supply-related total from the bill to judge it.
Includes a $2.25 monthly participation charge. household energy timing / working prototype
Run life on
greener hours.
Green Hours compares the supply choices available at home, then turns a changing price into a simple call when timing matters.
Know your plan. Then know your hour.Ameren Power Smart Pricing
RIGHT NOW5 PM
red hour
14.6¢per kWh · sample hourly supply signal
Hold the flexible, high-energy activities if you can.
Next green hour: 9 PMYour household, sorted by impact
Charge the car24 kWh session
Wait for 1 AM$2.83 possible savings
Run the dryerone electric load
Wait for 1 AM$0.35 possible savings
Use the ovenabout one hour
Use if needed$0.26 possible savings
Run the dishwasherone cycle
Wait for 1 AM$0.14 possible savings
Gaming sessionPC or console · 3 hours
Wait for 1 AM$0.14 possible savings
Run the washerone cycle
Okay now$0.06 possible savings
Watch TVabout 3 hours
Okay now$0.04 possible savings
Move through the hours
green < 8¢ · orange 8–12¢ · red > 12¢Compare supply choices
Know the plan before timing the hour.
This comparison uses 2,153.53 kWh from the uploaded 31-day period. Delivery charges and taxes stay outside the comparison because they generally do not change with the supplier.
$243.91 for this period at the current summer price to compare.
Published through September 30, 2026.$275.44 for this period—$31.53 more than Ameren standard.
O’Fallon fixed rate through May 2027.Check Power Smart Pricing
Enter the supply-related total from this bill.
Include the $2.25 participation charge if it appears elsewhere on the bill. Do not enter the full bill total.
Break-even: under $243.91 beats both current fixed choices for this period.
Before switching:
Power Smart Pricing customers are not automatically moved into the municipal aggregation program. Ameren's tariff also says a customer who leaves Power Smart Pricing cannot re-enroll for 12 consecutive months. Confirm the effective date before changing plans.
Known fixed-rate result: Ameren standard is $31.53 lower for this 31-day period. Homefield's value is a longer fixed term, not a lower current price. Rates checked July 17, 2026; Ameren can change, and past hourly-plan savings do not predict future results.
Home display feed
Built to leave the browser.
A small JSON endpoint sketches the path to TRMNL, Home Assistant, or another always-on display.
The first real-data check
Where this home used power.
2,153.53 kWh across 31 days of uploaded Ameren 15-minute data. These costs repeat the supplied sample price profile each day.
51.6% of usage$47.35 sample cost
14.6% of usage$31.87 sample cost
33.9% of usage$105.89 sample cost
The clearest opportunity: red hours are 25% of the day but held 33.9% of this home's usage. Average load was 3.92 kW in red hours versus 2.39 kW in green hours.
Shifting 10% of red-hour energy to the average green rate would save about $7.48 in this illustrative month. The recurring 5–6 PM peak points to cooling or another large load as the first thing to investigate.
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 hourly chart is the Ameren sample day supplied for this build. It is a wholesale supply signal, not an all-in bill rate.
Supplier first, timing second. Homefield Energy and Ameren standard residential pricing are fixed supply choices. Moving a load to another hour does not lower the supply cost on those plans.
Switch carefully. Existing Power Smart Pricing customers are not automatically enrolled in municipal aggregation, and Ameren's tariff imposes a 12-month wait before re-enrolling after leaving the program.
Hourly pricing, not Peak Time Rewards. Power Smart Pricing changes the supply price every hour. Peak Time Rewards is a separate event-based bill-credit program.
Private by default. Home setup and appliance choices stay in this browser in this version. No account or address is sent anywhere.