The federal 30% Clean Technology Investment Tax Credit applies regardless of how you pay, but timing matters.
The Clean Tech ITC is claimed against tax owing in the year your system is placed in service. For most residential paths the credit lands 12+ months after install when you file taxes. We never deduct it from your upfront price: you see the full system cost first, then the credit comes back to you when CRA processes the claim.
If you finance, your loan principal is the full price; the ITC refund can be applied as a lump-sum prepayment when it arrives, shortening the term. Some homeowners use it that way to compress a 10-year HELOC into roughly 8.
Eligibility depends on the entity (corporation, partnership, eligible trust) and how the system is used. Talk to your accountant. We'll provide the install documentation needed to support the claim.