Generator installation in Thornhill: what to expect
Outages in Thornhill come with ice storms and summer thunderstorms. Even a few hours without power matters if your basement relies on a sump pump or someone at home relies on medical equipment.
We size the generator from a load assessment — essential circuits only, or the whole home — install the automatic transfer switch, and coordinate the gas connection with a licensed gas fitter.
Prefer a portable generator? A properly installed inlet and interlock lets you power the panel safely, without dangerous back-feeding into Alectra Utilities's lines.
Local notes: Thornhill
1970s–80s homes. Large homes in Royal Orchard and Bayview Glen are often on 100 or 125 A services that struggle with today's appliances, central air and EVs.
Alectra Utilities. Thornhill is served by Alectra; we coordinate any utility work for service upgrades.
Typical costs
| Scope | Typical range |
|---|---|
| Generator inlet + interlock for a portable unit | $900 – $1,800 |
| Essential-circuits standby (approx. 10–14 kW) | $13,000 – $18,000 |
| Whole-home standby (approx. 18–26 kW) | $17,000 – $26,000 |
Where we work in Thornhill
We cover all of Thornhill, including Thornhill Village, Thornhill Woods, Royal Orchard, Bayview Glen, Uplands, Spring Farm, Doncaster, Crestwood. Every job starts the same way: a site visit, a written fixed quote, then the work — permit included.
More on this service: Standby generators · Electrician in Thornhill
Questions from Thornhill
What size generator does a Thornhill home need?
Essential circuits typically need 10–14 kW; whole-home backup with central air usually 18–26 kW. We size from a load assessment.
Who connects the gas?
A licensed gas fitter — we coordinate them as part of the job.
Is a portable generator inlet worth it?
For many homes, yes: it's far cheaper than a standby unit and powers the panel safely.
Generator installation nearby
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