Official StopWatt store
StopWatt official website — power-factor correction without the hype.
This is the official StopWatt store. StopWatt is a plug-in device that smooths the reactive current drawn by the motors in your home. We don't promise a percentage off your bill — we give you 60 days to test it and send it back if it does nothing for you.
- Free worldwide shipping
- 60-day guarantee
- Secure checkout
- 60-day money backTest it for a full billing cycle
- Free worldwide shippingShips in 1–2 business days
- Secure checkoutEncrypted card processing
- Human supportReal people, real replies
Why buyers choose the official store
Straight facts, then a risk-free test
Plug in, that's it
No wiring, no electrician, no app. Insert into any standard grounded outlet and the indicator light confirms it is working.
Targets motor-driven loads
Internal capacitors supply part of the reactive current used by pumps, compressors, fans and HVAC motors.
No inflated promises
We publish no savings percentage. You test it in your own home for a full billing cycle instead.
60 days to decide
If you are not satisfied, return it within 60 days of delivery for a refund of the purchase price.
How it works
Four steps, one minute of setup
1. Plug it in
One unit per 800–1,200 sq ft, plugged directly into a wall outlet — never a power strip.
2. Capacitors engage
Reactive energy is stored and released locally instead of travelling through your whole circuit.
3. Current in the wiring drops
Lower current means lower resistive losses and cooler conductors on those circuits.
4. Track your own kWh
Compare kilowatt-hours against the same month last year, and return the units if nothing changes.
Full detail in the how it works guide and the installation guide.
Order direct from the official store
Choose your StopWatt bundle
Pick the bundle that matches your home size, then complete your order securely on this page — no redirects, no account required.
Checkout — 3 Devices
Card details and your shipping address are collected on this page through our encrypted payment provider.
Secure checkout · Visa, Mastercard, Amex, Discover, Apple Pay & Google Pay
Do your research
We publish the criticism, not just the sales pitch
StopWatt reviews
What buyers report, and what critics say.
Does StopWatt really work?
The physics of power-factor correction, explained.
Is StopWatt legit?
How to spot look-alike reseller checkout pages.
The Shark Tank claim
Why we make no TV or celebrity endorsement claim.
Complaints, addressed
The criticism of this product category, answered.
StopWatt vs alternatives
Where a power-factor device ranks against thermostats and monitors.
Common questions
What exactly does StopWatt do?
Will it lower my electricity bill?
How many devices do I need?
How long does shipping take?
Do you ship outside the USA?
How do I return an order?
More answers on the full FAQ page.
Everything about StopWatt, in one place
Researching before you buy? These pages on the official StopWatt website answer the questions people ask most.