StopWatt is a small device you plug into a wall outlet. The manufacturer says it smooths out unstable current, filters dirty electricity in the 4 to 150 kHz range and absorbs spikes that can wear down appliances and electronics.

How does StopWatt work?

According to the official site, it uses capacitors and a magnetic filter to stabilize the current and reduce electrical noise on the home's wiring. A green light shows the unit is plugged into an active outlet and working.

How much does StopWatt cost?

On the official site, one unit costs $49.00, two units cost $98.00 ($49.00 each) and three units cost $117.60 ($39.20 each). Shipping is charged separately and goes down on the larger kits.

Does StopWatt lower my electric bill?

The manufacturer says it can reduce energy waste, but it also states that results depend on home size, usage, climate, power company and the age of the home. It does not guarantee a specific saving, which is why the 60-day money back guarantee matters.

Does StopWatt work with 220V?

No. StopWatt is built only for 110V North American electrical systems.

Is StopWatt safe to leave plugged in?

The manufacturer recommends leaving it plugged in all the time and says it is UL approved and RoHS compliant.

How many StopWatt units do I need?

The manufacturer recommends 1 unit for every 800 to 1,200 sq ft. In homes with more than one unit, each one should go on a separate breaker, ideally at opposite ends of the house.

What is the StopWatt refund policy?

You have 60 days from delivery to ask for a full refund by email. Every order also includes a 1-year warranty against defects.

StopWatt: Price, 60-Day Guarantee and How It Works (2026)

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About StopWatt: price, guarantee and how it works

StopWatt: Price, Guarantee and How It Works

StopWatt is a plug-in device that goes into a standard wall outlet. The manufacturer says it stabilizes the electrical current in a home, filters what it calls dirty electricity and helps protect appliances from spikes, with the goal of a lower power bill. It works only on 110V North American systems, sells for $49 to $117.60 depending on the kit, and comes with a 60-day money back guarantee and a 1-year warranty.

StopWatt at a glance

What it is	Plug-in power stabilizer and dirty electricity filter for homes and small businesses
Compatibility	110V North American electrical systems only. Not compatible with 220V
How many units	1 unit per 800 to 1,200 sq ft, according to the manufacturer
1 unit	$49.00 + $9.95 shipping (small home, 800 to 1,200 sq ft)
2 units	$98.00 total, $49.00 each + $4.98 shipping (1,200 to 1,500 sq ft)
3 units	$117.60 total, $39.20 each + $3.32 shipping (1,500+ sq ft, most popular kit)
Guarantee	60-day money back guarantee, counted from the delivery date
Warranty	1-year standard warranty against defects
Shipping	Ships from the USA within 24 to 48 hours. USPS Priority Mail takes 5 to 7 days
Time to see results	The manufacturer asks buyers to allow 6 to 8 weeks

Frequently asked questions

What is StopWatt?: StopWatt is a small device you plug into a wall outlet. The manufacturer says it smooths out unstable current, filters dirty electricity in the 4 to 150 kHz range and absorbs spikes that can wear down appliances and electronics.
How does StopWatt work?: According to the official site, it uses capacitors and a magnetic filter to stabilize the current and reduce electrical noise on the home's wiring. A green light shows the unit is plugged into an active outlet and working.
How much does StopWatt cost?: On the official site, one unit costs $49.00, two units cost $98.00 ($49.00 each) and three units cost $117.60 ($39.20 each). Shipping is charged separately and goes down on the larger kits.
Does StopWatt lower my electric bill?: The manufacturer says it can reduce energy waste, but it also states that results depend on home size, usage, climate, power company and the age of the home. It does not guarantee a specific saving, which is why the 60-day money back guarantee matters.
Does StopWatt work with 220V?: No. StopWatt is built only for 110V North American electrical systems.
Is StopWatt safe to leave plugged in?: The manufacturer recommends leaving it plugged in all the time and says it is UL approved and RoHS compliant.
How many StopWatt units do I need?: The manufacturer recommends 1 unit for every 800 to 1,200 sq ft. In homes with more than one unit, each one should go on a separate breaker, ideally at opposite ends of the house.
What is the StopWatt refund policy?: You have 60 days from delivery to ask for a full refund by email. Every order also includes a 1-year warranty against defects.

See today's price on the official StopWatt website

Information based on the manufacturer's official website, updated October 2026. Results vary and individual results are not guaranteed. This page contains affiliate links. If you purchase through our links, we may earn a commission at no extra cost to you.