It ended the thermostat argument
"We'd been going at each other about the air conditioning every summer. I plugged this in and stopped caring who touched it. That's worth it on its own."

Stop paying for power you never use. Plugs into a standard outlet near your breaker panel — no wiring, no electrician.
+ $3.32 USA shipping · Shipping & returns
StopWatt is a plug-in energy saver device that conditions the power across your home's shared loop, aimed at cutting spikes, heat lost in the walls, and power you're billed for but never use.

Spikes. Surges. Micro drops. Heat loss. Standby draw.
It leaves as heat in your walls. It lights nothing. It charges nothing. That's why the bill can climb in a month when nothing in your house changed.
The problem isn't how much you use. It's how much of it you never get to use.

All of that helps a little. But every one of those things works on the power your house actually uses. StopWatt goes after the part that never reaches you.
It conditions the power across your home's shared loop, helping cut:

Any standard outlet near your main breaker panel.

It takes seconds.

You never think about it again.
No rewiring. No electrician. Nothing opened, no bare wire touched.

You've probably wondered if it will work for your house, and what happens if it doesn't do anything. All fair.
"We'd been going at each other about the air conditioning every summer. I plugged this in and stopped caring who touched it. That's worth it on its own."
"I've seen things like this advertised for years and never bought one. I gave it the sixty days because I could send it back. I didn't send it back."
"Place was wired in the sixties and it isn't small, so one was never going to cover it. I took the six. No wiring, no electrician, no mess."

When something works, it gets copied. Since StopWatt started selling, listings have appeared on marketplace sites using our photos, our name and our wording. They aren't built by us and aren't covered by our guarantee.
StopWatt is sold on the official website only. We don't supply Amazon, eBay, marketplace sellers or any retail store.

Smooths the spiked current on your home's loop, so appliances stop fighting it and stop shedding your money as heat.

Most people pay for a strip that guards one wall. This sits on the loop the whole house shares.

Old or new, owned or rented, any standard outlet. Bigger homes use more than one.

No filters, no settings, nothing monthly. Plug it in once and leave it.
| StopWatt | Using Less | |
|---|---|---|
| Works on the wasted part | ✓ | ✕ |
| Nothing to give up | ✓ | ✕ |
| Covers the whole house | ✓ | ✕ |
| Protects from surges | ✓ | ✕ |
| Done once, not every day | ✓ | ✕ |
One unit covers an apartment or small home. Bigger homes use more units, each on a separate breaker, on separate floors or opposite ends of the house.

Larger homes
$261.33 · Save $143.73

Mid-size homes
$217.78 · Save $119.78

Apartments & small homes
$108.89 · Save $59.89
Ships from the USA via USPS within 24–48 hours (weekends and holidays excluded). Standard shipping 5–7 days, express 2–3 days. Tracking by email.

If after 60 days of using StopWatt you haven't saved enough on electricity to cover the cost of your purchase, you get a 100% refund, including shipping. The 60 days start the day your order is delivered. Email us to request a refund and get return instructions.
Can't find what you need? Email support@stop-watt.net
Order from the official StopWatt website and try it for 60 days.
You'll be taken to our secure checkout