IoTaWatt, Inc is a US company. The units are manufactured and shipped from it’s northeast location in scenic New Hampshire. We use the various services of the United States Postal Service, Asendia, and UPS. The applicable options for your country will appear in the checkout.


Shipping within the 50 US states is free for orders of $200 or more. All orders are shipped USPS Priority Mail with service from 1-3 days depending on distance and time-of-week. For orders less than $200, or those preferring to use Priority Mail Express, we charge the USPS retail rate with no additional fees.

Next day service is also available with UPS next day air.


For our northern neighbor favorable rates are available. We offer a flat-rate of $20 for packages up to 4 lbs. USPS First-Class International is used and the package typically arrives by Canada Post within 1-2 weeks. Where you don’t see that offered in checkout, the weight exceeds 4 lbs.

USPS Priority International is available packages above 4lb or when somewhat faster delivery is desired (though no longer guaranteed).

UPS standard and express are available at checkout. Standard can take as little as 3 days to eastern provinces. UPS will collect customs and taxes directly including a $15 “processing fee”. On balance, it is competitive with USPS priority and service should be more reliable in the current climate.

A USMCA certificate of origin is included to waive duties on the base unit (USA) and AccuCT current transformers (Canada).



The magic number with international shipping is 4 lbs (1.8kg). Rates increase dramatically after that. As such, we offer low flat rates below 4 lbs. Sometimes it may be advantageous to break up a larger order into two smaller orders. The shipping calculator in the shopping cart is helpful in making that decision.

USPS has been unreliable during Covid. Our shipping partner has switched to an independent aggregator that forwards directly to the destination country postal service. Delivery time can be 2-6 weeks.

0-2 lbs – $20 US, 2-4 lbs – $30 US


For packages exceeding 4lb or where faster delivery is desired, USPS Priority International is available:

USPS Priority International is a shadow of it’s former self. Since the Covid pandemic, they have discontinued their delivery guaranty, and lately appear to make no effort whatsoever to provide their advertised delivery time. There is no discernable difference between Priority International and Priority International Express except the much higher price, therefore we no longer offer Priority International Express.

UPS is the gold standard for on-time delivery. It is price competitive with USPS Priority and consistently meets their advertised delivery. Typical delivery is less than a week worldwide.

Duties and Taxes

IoTaWatt does not collect destination duties or taxes. We have enough experience with our own imports to appreciate how complex that can be. Destination postal services have infrastructure in place to collect whatever is due. We include the appropriate customs declarations with each international shipment. Each country has their own methods and procedures for notification and collection. It’s up to the individual recipient to contact their local postal service with the tracking number if there is a suspected delay or lost notification.