Installing solar panels yourself in Canada

The idea is tempting. Panels are sold by the pallet, videos make the job look like a long weekend, and labour is a large slice of any quote. Whether you can do it, though, depends less on your handiness and more on your province, your utility and your insurer. This guide, part of our installation and installers hub, covers what is realistic and where the sensible lines are.

Start with the rules

Electrical work in Canada is regulated provincially, and the details differ. In some provinces homeowners may do certain electrical work on their own house under a homeowner permit, with an inspection. In others, any work involving the service panel, or any grid-connected generation, must be done by a licensed electrician or contractor. Some limit what a homeowner can do on a roof-mounted system at all.

Before spending a dollar on equipment, call your provincial electrical safety authority and ask plainly: can a homeowner install and permit a grid-tied solar system on their own house, and what do they need? Write down the answer. Our overview of permits and inspections explains the process that applies even when a pro does the work.

The utility has its own say

A grid-tied system cannot be switched on without the utility’s approval. Utilities generally require an application, a single-line diagram, equipment lists, an inspection certificate, and often an agreement signed by the property owner. Some require work by a licensed contractor, or certified equipment only. That process, and what the utility is protecting, is covered in the solar interconnection process.

An unapproved connection is a safety risk to line workers and may breach your service terms, so skip this step at your peril.

Safety is the real issue

Two hazards stand out. The first is the roof. Falls are a leading cause of serious injury in residential construction, and carrying heavy panels up a ladder in wind is dangerous. Professional crews use fall protection and know the pitfalls of icy or steep roofs.

The second is electricity. Panels produce direct current whenever light hits them, and you cannot switch that off. Strings of panels can reach several hundred volts, and DC arcs are stubborn and can start fires. Grounding, wire sizing, connector quality and rapid shutdown arrangements all matter, and the electrical code sets rules for each. Equipment should carry recognised certification marks such as CSA.

Insurance and resale

Tell your home insurer about any plan to add solar, and ask what they require. Many want to see a permit, an inspection report and proof of licensed electrical work. A system that was not permitted may be excluded from coverage, and it can come back at resale when a buyer’s inspector or lawyer asks for the paperwork. Fixing an unpermitted system later often costs more than doing it properly the first time.

What DIY actually saves

Labour is a notable share of an installed price, so a DIY approach can reduce costs. Still, the maths is less friendly than it looks. You pay for permits, for licensed electrical work where required, for tools, for safety equipment, and for mistakes. You lose installer warranties on workmanship, and some equipment warranties and incentives need a certified installer. Provincial programmes may also require licensed contractors, so check before assuming you qualify. To judge the savings fairly, compare against several quotes, using our guide to solar panel costs for typical ranges. Quotes at around $2.50 to $3.80 per watt before incentives are common at the time of writing, though your region may differ.

Middle paths

Not all options are all or nothing. A few that homeowners use:

• Design the system and buy equipment yourself, then hire a licensed electrician to connect it and handle the permit, while a roofer or installer handles mounting.
• Hire a professional for the roof work and utility connection, and do the groundwork yourself, such as clearing the site or running trenching for a ground mount, if rules allow.
• Ask installers for a quote on labour only, if you buy the equipment. Not all will agree, and warranties may change.
• Choose a company that offers a transparent itemised price so you can see where the money goes.

Many installers will not warranty equipment they did not supply, so ask before you buy anything. Our checklist for choosing a solar installer helps you compare offers.

When DIY is more reasonable

Small off-grid systems at a cottage, a cabin or a workshop are the common exception, because they do not connect to a utility and often fall under different rules. Even so, the wiring must be safe, batteries need care, and some provinces still require permits or inspections for the electrical work. Our guide to solar for cottages and off-grid properties covers what changes when there is no grid.

A sensible decision rule

If you are comfortable on a steep roof, you understand electrical code, your province allows homeowner work, and your utility and insurer are on board, DIY may be possible. If any of those is a doubt, hire a licensed professional, and put your effort into comparing quotes, checking licences, and reading the contract. The cheapest system is not the one that costs least on day one, but the one that is still working safely, with intact warranties, in year twenty.