1Rate plan

2Comfort

3Thermostat

4Activate

Step 1 — where your power comes from

Find your time-of-use plan

Pick your utility and rate plan. We use it to learn when power is cheap, expensive, and most expensive — then cool your home around those windows.

How should we find your plan?

State

Electric utility — type to search, or pick from the list

Step 2 — your comfort, your rules

Set comfort & floor for each price window

For every pricing window, choose the warmest you'll tolerate (comfort) and the coolest we may pre-chill to (floor). The line riding over the ribbon is the setpoint plan we'll run.

Your day on Overnight Advantage Super off-peak Peak Super peak

Step 3 — connect your Nest

Link your thermostat

Overnight controls your Nest through Google's Device Access API. Just sign in and approve your thermostats — there's nothing to copy or paste, and your Google password never touches this site.

Step 4 — you're set

Review & turn it on

This is the schedule we'll run every 15 minutes. You can change any of it later — savings update automatically.

Saved vs. holding 79°F all day

this cooling season · estimated

—

Cooling runtime

▼ less than baseline

—

Run during super-peak

▼ shifted to overnight

Savings over time

Your schedule against the constant-79°F counterfactual.

Cost: your schedule vs. holding 79°F

Last 14 days

Hold 79°F (estimate) Your schedule

Cumulative savings

Money kept in your pocket, running total

Saved to date

Where your cooling runs

You want runtime stacked in the cheap window, not the red one.

Super off-peak · 2.2¢ Peak · 10.2¢ Super peak · 30.3¢

How these numbers are built: runtime is sampled every 15 minutes from your thermostat; the “hold 79°F” comparison is a model estimate using cooling-degree-hours times a thermal coefficient k learned from your own logged runtime. Rates shown are the all-in price per kWh including the fuel rider and tax. Swap the placeholder rider/tax for the figures on your real bill in Settings for exact dollars.

Overnight

Predictive HVAC for time-of-use power

Cool your home when power is cheap.
Coast when it's not.

Overnight reads your Nest, pre-chills the house overnight while electricity is at its cheapest, then lets it gently coast through the expensive afternoon peak — so you stay comfortable and your bill drops. No new hardware, no thermostat babysitting.

Not on the list? Request access →

One summer day, your way cheap mid peak

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How it works

Three steps, then it runs itself

Set it up once. Overnight checks your thermostats every 15 minutes and adjusts around your utility's price windows — automatically, in the background.

Connect your Nest

Sign in with Google and link your thermostats in two clicks. No keys to copy, no wiring, nothing to install. Works with the Nest you already own.

Tell us your rate plan

Pick your time-of-use plan and your comfort range. Overnight learns when power is cheapest, when it's priciest, and how fast your home heats up.

Save while you sleep

It banks cheap overnight cold, pre-chills before the afternoon peak, then coasts through the expensive hours with the AC mostly off. You just feel comfortable.

What it adds up to

Same comfort, smaller bill

Illustrative week

$20.00

vs. simply holding one temperature all day, on a summer time-of-use plan.

≈ $80 over a hot month

Hold one temperature With Overnight

Not on the list yet?

Request access or ask a question

We keep early access small — five homes at a time. Leave your details and we'll get back to you.

Name

Anything you'd like us to know? — optional

Ready to put your AC on the cheap shift?

Early access is invite-only while we keep it small. If you're on the list, you're two clicks from connecting.

The honest version: savings are model estimates, not a meter reading — they depend on your rate plan's price spread, your local weather, your home, and your comfort settings. Overnight only saves money on time-of-use plans where off-peak power is genuinely cheaper than peak; it'll tell you upfront if your plan can't help. Your thermostat data stays in your own Google account.

Built and run by Sandeep & Aarav Gaudana