The Power You Never Stop Paying For
At 3am, with everyone asleep and nothing switched on, your home is still drawing power. That floor runs 8,760 hours a year, and for many homes it's the largest single line item on the bill.
There's a number about your house that your bill will never show you: the draw it never falls below. Not the average. The floor — what's flowing at 3am with everyone asleep.
A typical single-family home sits somewhere near 400 watts. Plenty run at 800W or more. The difference between those two matters enormously, because this load runs every hour of every day:
- 400W × 8,760 hours = 3,504 kWh a year
- 800W × 8,760 hours = 7,008 kWh a year
At $0.34/kWh, that gap is about $1,190 a year — for electricity nobody is consciously using.
Why your bill can't show you this
A monthly bill is one number: total kilowatt-hours. It cannot distinguish 700 kWh of air conditioning on twelve hot afternoons from 700 kWh of something humming along at 950W continuously. Same total, completely different problem, opposite solutions.
Separating them requires interval data — meter readings every 15 or 60 minutes. Your utility has it, and under the Green Button standard you can download or share it. Once you can see the overnight minimum, the always-on load stops being a guess.
The usual suspects
In rough order of how often they turn out to be the cause:
The garage refrigerator or freezer. This is the number one finding, and it's not close. An old unit is inefficient to begin with; putting it in an uninsulated garage that hits 100°F in summer means it runs nearly continuously. A 1990s garage fridge can draw 150–250W around the clock — $450–750 a year to keep a case of drinks cold.
A pool or pond pump. A single-speed pool pump can pull 1,500–2,500W while running. If it's on a long schedule, it dominates everything else in the house.
Aquariums. Heaters, pumps, and lighting on a large tank run continuously and add up faster than people expect.
Well pumps and sump pumps that short-cycle because of a failing pressure tank — running far more often than the job requires.
Heated towel rails, crawlspace dehumidifiers, and pipe heat tape left energized year-round when they're only needed seasonally.
Networking and entertainment gear. Real, but usually 30–80W in total — worth tidying, not worth obsessing over. If someone tells you phone chargers are why your bill is high, they haven't looked at the data.
Finding yours
With interval data, this is immediate: the flat overnight minimum *is* your always-on load. Nothing else to do.
Without it, use the meter directly. Late at night, with the household asleep, switch off everything you can and watch the meter for a minute. A digital meter usually shows instantaneous kW; a spinning-disc meter can be timed against its Kh rating. Then flip individual breakers off one at a time and watch what the floor does. The circuit that drops it most is your answer.
A plug-in energy monitor on a suspect appliance for a week costs about $25 and settles the question definitively.
What it's worth fixing
Be realistic. You cannot get to zero — a refrigerator, a router, and smoke alarms all need to run. A sensible target is removing about a quarter of an elevated floor, which is usually one or two specific things:
- Retiring a second refrigerator: often 1,300–2,200 kWh a year.
- Moving a single-speed pool pump to a variable-speed model and running it longer at lower speed: frequently the largest single saving available to a home that has a pool.
- Fixing a short-cycling pump or a heat pump stuck in auxiliary mode.
The reason this matters more than efficiency advice
Always-on load is *constant*, which means it's immune to almost everything else people recommend. Insulation doesn't touch it. A smart thermostat doesn't touch it. Shifting usage to off-peak hours barely touches it, because it's running during your cheap hours too.
It also means it's completely unaffected by weather — so if your usage barely changes between January and July, your bill isn't a heating and cooling problem at all, and every dollar spent on the building envelope is a dollar spent on the wrong thing.
That single distinction — constant load versus seasonal load — decides which advice is worth taking. It's the first thing a proper audit should tell you.
Frequently asked questions
What is a normal always-on electricity usage?
A typical single-family home sits near 400W continuously, though smaller and newer homes can be well under 200W. Above roughly 650W is worth investigating; above 900W there is almost always one specific appliance responsible.
How do I find what's using electricity at night?
The fastest way is your utility's interval data, where the overnight minimum is the answer directly. Failing that, watch your meter late at night and switch breakers off one at a time — the circuit that drops the reading most is the one to investigate.
Is phantom load the same as standby power?
They overlap but aren't the same. Standby power means devices drawing a little while switched off, which is usually small. Always-on load is everything running continuously, including things that are genuinely doing their job — the second refrigerator, the pool pump, the aquarium. That's where the real money is.