StopWatt frequently asked questions

StopWatt is a plug-in power factor correction device for the home. It goes into a standard wall outlet, and internal capacitors supply part of the reactive current drawn by motor-driven appliances such as air conditioners, heat pumps, fridges, pumps, washers and dryers, which reduces the current carried in the wiring near it. There is no wiring, no app and no subscription.

We do not publish a savings percentage, because we cannot verify one for your home. Residential meters in most countries bill real power in kWh, so any bill effect comes from reduced in-home losses and depends entirely on what runs in your house and how your wiring is laid out. The honest way to find out is to run it for one full billing cycle, compare your statement, and send it back inside 60 days if you are not satisfied.

The device and this store are real: you are buying from the official StopWatt store, checkout is processed by an encrypted PCI-compliant payment provider, and every order carries a 60-day money-back guarantee. What is not real is the wave of affiliate pages promising fixed savings percentages, fake celebrity endorsements and Shark Tank claims. We do not make any of those claims here.

No. StopWatt has never appeared on Shark Tank, and any page or advert saying otherwise is not affiliated with us. Those pages usually exist to collect affiliate commissions on a look-alike checkout.

Homeowners with real motor loads running most of the year: central air conditioning or a heat pump, a well or pool pump, a second fridge or freezer, a washer and dryer. If you live in a small all-electric-baseboard apartment with almost no motor-driven appliances, there is far less for a power factor device to act on, and we would rather tell you that up front.

Your StopWatt device or devices in sealed retail packaging, plus a quick-start placement card. Nothing else is needed — no tools, no adapters, no installer.

There is no consumption display. The unit has an indicator light that confirms it is powered. If you want measurable feedback, a clamp meter on the appliance branch or a plug-in energy monitor is the practical way to observe current before and after.

Motors do not use every amp they pull. Part of the current goes into building the magnetic field the motor needs and then flows back to the source, cycle after cycle. That returning portion is reactive current. Power factor is simply the ratio between the power that does useful work and the total the circuit carries. Capacitors can supply some of that reactive current locally instead of pulling it down the whole length of your wiring.

Residential meters bill real energy in kWh, not apparent power, so correcting power factor does not directly reduce what the meter counts. What it can reduce is resistive loss in your own wiring, because less current in a conductor means less heat lost in that conductor. That is a real effect, and it is also why the size of it varies so much from home to home.

Plug it into a standard wall outlet, ideally on the circuit nearest your largest motor appliance, and leave it in. The indicator light confirms power. There is no wiring, no breaker work and no configuration, so nothing about it should require an electrician.

Close to your heaviest motor loads: the utility room, the laundry, near the air handler, or the outlet nearest the pool or well pump. Avoid burying it behind furniture, and use a wall outlet rather than a power strip so the connection stays solid.

Yes. It is designed for continuous use and only does anything while it is energised. Its own draw is negligible.

The unit is a sealed, passive capacitor device with no user-serviceable parts and no heating element. Keep it in a dry indoor outlet, away from water, and do not use it with a damaged outlet. If a unit is ever hot to the touch, damaged or behaving oddly, unplug it and contact support for a replacement.

No. It does not communicate, transmit or modify the supply to your appliances. It sits in parallel on the circuit rather than in series with anything.

It is designed for standard residential mains outlets in the region it is supplied for. Because plug types and voltages differ by country, tell us your destination country at checkout or by email and we will confirm the correct version before your order ships.

Plan for roughly one unit per 800 to 1,200 sq ft, with at least one on each floor, and put extra coverage near the circuits feeding your biggest motor appliances. As a rule of thumb: one device for an apartment or small single-level home, two for a 1,200 to 1,500 sq ft home, and three for anything larger or spread over multiple floors.

It is a genuinely lower unit price. One device is $44.10, two are $88.20 — the same $44.10 each — and three are $105.84, which works out at $35.28 per device. The third unit effectively costs $17.64. If your home has more than one floor or more than one large motor appliance, that is the bundle most buyers choose.

Yes, and for a small single-level home that is the sensible way to do it. Just note that a second, separate order is charged at the single-device price rather than the bundle rate, so if you already know you want coverage on two floors it costs less to take the bundle now.

Yes. Add the extra-device option at checkout, place a second order, or email support and we will help with a larger household order.

It affects the circuits nearest to where it is plugged in most. A single unit in a large or multi-storey home leaves the far side of the panel uncovered, which is the usual reason someone reports no difference on a big house after buying one device.

$44.10 for one device, $88.20 for two, and $105.84 for three ($35.28 each). Every order is a one-time charge with free worldwide shipping and a 60-day money-back guarantee.

One-time. There is no subscription, no membership, no auto-ship and no trial that quietly converts into a recurring charge. You are billed once for the bundle you choose and that is the end of it.

No. There is no shipping fee, no handling fee, no activation fee and no restocking fee. The only thing that can be added is sales tax where your local law requires it, calculated from your shipping address and shown before you pay.

Visa, Mastercard, American Express, Discover, Apple Pay and Google Pay.

Yes. Checkout runs on an encrypted, PCI-compliant payment provider embedded in the page. Your full card number is never sent to or stored on our servers, and the connection is TLS encrypted end to end.

The bundle pricing on this site is already the discounted direct price, and we do not run a separate coupon layer on top of it. Codes advertised elsewhere are almost always affiliate pages recycling this same price to earn a commission.

Yes, all prices and charges are in US dollars. If your card is issued in another currency, your bank converts at its own rate and may add a foreign transaction fee we do not control.

An emailed receipt with your order number arrives immediately after payment. If you need an invoice with different billing details, email support with your order number and we will send one.

Free, worldwide, on every order with no minimum.

Orders leave the warehouse in 1 to 2 business days. Delivery typically takes 3 to 7 business days within the USA and 7 to 15 business days internationally, depending on your local carrier and customs.

We ship worldwide, and shipping is free to every destination we serve. If your country appears at checkout, we ship there.

Any import duty, VAT or handling charge levied by your own country is set by that country and is the recipient's responsibility. We cannot pre-pay or waive it, and we do not mark parcels as gifts.

A tracking number is emailed to you the moment your parcel leaves the warehouse. If it has been more than 2 business days since you ordered and nothing has arrived, check your spam folder and then email support with your order number.

If the order has not shipped yet, usually yes. Email support with your order number and the corrected address as soon as possible and we will update it if the parcel is still with us.

Email support with your order number and, for damage, a photo. We will replace the order or refund it — a lost or damaged parcel is our problem to fix, not yours.

You have 60 days from delivery to return your order for a refund of the purchase price. That window is deliberately longer than one billing cycle so you can actually compare a statement before deciding.

Email support with your order number inside the 60-day window and we will send return instructions. Once the return is received, the purchase price goes back to your original payment method.

No. You do not have to justify the decision or prove anything about your bill.

No restocking fee. The purchase price is refunded in full.

Bundles are refunded as a unit, so return the complete bundle rather than a single device from it. If you want to keep some units, contact support before returning and we will tell you exactly what your options are.

We process refunds as soon as the return is received. Your bank or card issuer then typically takes 3 to 10 business days to post it, which is outside our control.

Defective units are replaced free within the guarantee period — email support with your order number and a short description of what the unit is doing.

Yes. getstopwatt.net is the official StopWatt store. The pricing, the 60-day guarantee, the free worldwide shipping and the support on this site apply to orders placed here — they are not enforceable on an order you place through a third-party listing.

Listings that appear there are third-party resellers, not us. They set their own price, shipping cost, return window and support policy, and we cannot honour our guarantee on a purchase made through them.

Every review published here is tied to a verified order number from this store and is moderated before it appears. We do not buy reviews, write them ourselves, or publish an average rating that is not backed by real verified purchases.

Because we would be making it up. Anyone quoting you a fixed percentage for a passive power factor device on a residential kWh meter is guessing or selling. We would rather give you 60 days to measure it in your own home than a number that cannot be verified.

Email support@getstopwatt.net with your order number if you have one. Support answers within one business day, and orders, returns and replacements are all handled by the same team that ships your parcel.

We collect only what is needed to process and ship your order and to answer support requests. Card details are handled entirely by our payment processor, and we do not sell your data.