Solar & EV installer cross-border tax: origin, tariffs and the rare US job

Origin decides the landed cost before the tariff schedule does

Panels, inverters, racking and charger units come from a genuinely mixed set of countries: China and Southeast Asia supply a large share of the global panel market, some premium inverters and chargers are made in the US or Europe, and a handful of manufacturers, including panel makers with plants in Mississauga and Sault Ste. Marie and a well-known EV charger maker based in Quebec, build in Canada. Country of origin is the fact that decides whether a shipment carries ordinary duty, a trade surtax, or neither, and that answer has been genuinely unstable: Ottawa has already imposed surtaxes on Chinese-made electric vehicles and on Chinese steel and aluminum, and has consulted publicly on extending similar measures to other clean-technology imports. Whether a specific order of panels or inverters carries a surtax is a country-of-origin question we check against the current CBSA measures in effect at the time an order is placed, not something we generalize from last year's list.

When you import directly rather than buying from a Canadian distributor, you are the importer of record, which means an account in CBSA's CARM portal and your own financial security for duties. Duty and any surtax become part of the landed cost that flows into the job; the GST charged at the border on the duty-paid value is recoverable as an input tax credit like any other purchase, and a supplier invoice priced in US dollars is booked at the exchange rate on the invoice date and settled at the rate on the payment date, with the difference recorded as a gain or loss.

Manufacturer warranties settle in US dollars

Many of the premium panel, inverter and charger brands installers rely on are US or globally headquartered, which means a warranty claim is often processed in US dollars and a replacement unit may be shipped back across the border. CBSA generally has relief provisions for goods returned for warranty repair or replacement, but they depend on documentation connecting the returned unit to the original import, so we keep that paper trail in the job file rather than treat a warranty swap as a routine new purchase. The currency side is simpler: a warranty credit or replacement invoiced in USD is booked and reconciled the same way any USD supplier transaction is.

Two clean-technology credits, not one

Canada's federal Clean Technology Investment Tax Credit and the US federal credits that supported American solar buyers are separate programs with separate rules, and they do not offset or substitute for one another. The Canadian credit is generally aimed at a taxable Canadian corporation acquiring qualifying equipment for its own use, not at a homeowner or at the installer selling the system. On the US side, the residential and commercial clean-energy credits that shaped the American market have been narrowed by federal tax changes enacted in 2025, and as at the time of writing the details continue to be interpreted, so we treat any comparison a client raises between the two countries' incentives as a question to model with current rules rather than an assumption carried over from a prior year. A client who owns property or runs a business on both sides of the border should have each calculated on its own facts.

The occasional US installation job

An Ontario installer is sometimes asked to do a single job across the border — a cottage, a small commercial site, an EV charger for a client's US property. Under the Canada-US tax treaty, a building site or installation project only becomes a US permanent establishment once it runs past twelve months, so a single job does not by itself create US federal income tax exposure; the treaty position is still claimed on a protective Form 1120-F with Form 8833 attached, and a W-8BEN-E goes to the client so no 30 percent withholding is taken from the payment. State income tax rules do not always mirror the treaty, and electrical contractor licensing is set state by state, so both are checked before a price is quoted. The harder limit is usually people rather than tax: Canadian employees generally cannot perform hands-on electrical or installation work in the US on a routine business-visitor entry, so the workable model is a Canadian supervisor paired with a US-licensed local electrician, which also settles the US payroll question before it becomes one.

For most installers this section stays theoretical, and the honest answer is that it should: chasing a single US job across a state licensing and treaty-filing process rarely pays for itself unless the relationship is an ongoing one. The full cross-border toolkit sits on our cross-border tax services page, and the domestic side of the equipment and HST questions above is covered on our solar installer tax services page.

Source: CBSA — CARM, the CBSA Assessment and Revenue Management system.