How Home Generator Index ranks companies

How does Home Generator Index rank companies?

Each company gets a Home Generator Index Score out of 100, built from three parts: what its customers say, what the company states on its own website, and how much is on its record. The score is deterministic, meaning the same data always produces the same rank, and it is published in full so anyone can audit a position on any of our 480 listings. Across the directory today it runs from 18 to 87, with a median of 60.

Before the score decides anything, one rule outranks it. A company with fewer than 3 reviews, or a rating below 4.0, sorts below every company that clears that bar no matter how well it scores. 71 of our 480 listings are in that position. It is a statement about how thin the public record is, not about the work.

What is each part of the score worth?

Every line below is read straight out of the ranking code, not typed into this page, so what you see here is what the sort actually did. Each part is capped at its weight, so no single signal can run away with the total.

What happens when a company’s website does not load?

On August 19, 2026 we fetched every website on this directory once, politely and from a datacentre. What came back is worth a few points of the record part of the score, on this scale:

• The site answered10 points

  We fetched it and got the page.

• The site turned our crawler away8 points

  A 403, a robots.txt rule or a timeout. Something is there and we could not read it, which is not the same as a business being gone.

• The site did not answer2 points

  The domain does not resolve, refuses the connection, returns a server error, or is gone (404 or 410). It still keeps its listing.

• No website on the record0 points

  There was nothing of the company's own to read.

Two things about that scale matter more than the numbers in it. First, a site that refuses our crawler is not treated as a closed business: a 403, a robots.txt rule or a timeout usually means a person with a browser gets the page normally, and scoring those as dead would publish something false about companies that are trading. Second, no listing is ever hidden, filtered or removed because of this check. Being unreachable from a datacentre is not evidence that a business has closed, and a company whose domain has lapsed is a company with a lapsed domain. It keeps its page.

What is a Bayesian-adjusted rating?

A raw star rating is misleading when the review count is tiny. Home Generator Index fixes this by blending each company's rating with the dataset average, treating every company as if it started with 10 imaginary reviews at the mean of 4.76 stars. A company with thousands of reviews barely moves, while a 5.0 built on 4 reviews is pulled toward the average until it earns more history.

This is the same shrinkage approach behind IMDb's Top 250 and other credible ranking systems. The effect: on Home Generator Index, a proven 4.8 rating over 300 reviews outranks an unproven perfect score, which is what most people would pick anyway.

What does “says it is licensed” mean, and what have you checked?

This is the most important paragraph on the page, so it is written as plainly as we can manage. On August 19, 2026 we fetched 480 companies’ own websites and recorded only sentences we could quote back. When a profile says a company says it is licensed, that means exactly one thing: those words, or words very close to them, appear on that company’s website, and the sentence they appear in is printed underneath so you can judge it yourself.

What it does not mean is that anybody checked. Home Generator Index has not rung the Electrical Safety Authority, has not rung TSSA, has not seen a certificate of insurance and has not confirmed a WSIB account. That is why you will never read “Licensed”, “Certified” or “Verified” on its own anywhere on this site. Every one of those labels begins with “Says”, because we are quoting a business about itself. Ontario requires an ECRA/ESA licence for electrical work and TSSA registration for the gas side of a standby install. Check both yourself, at esasafe.com and tssa.org, before you hire anybody.

A claim with no quote behind it is not published at all. The pipeline that reads these sites rejects a finding it cannot quote rather than storing it, so there is no inference anywhere in the statements part of the score - nothing was guessed from a company looking established or a page looking professional. We also throw away sentences that are advice to the reader rather than a claim by the business: a page that says “always verify your contractor is insured” is telling you to check, not telling you it is insured, and it earns nothing.

What does the score look like in practice?

This is not a hypothetical company. It is the highest-scoring record in the directory today, Captain Electric, taken apart by the same function that put it there. Every profile on this site carries the same breakdown, so you can do this for any of the 480 companies listed.

Captain Electric scores 87 out of 100, against a directory that runs from 18 to 87 with a median of 60. Note how much of the total comes from customers rather than from the company: the reviews part alone is worth 42 of the 100, which is deliberate. A company can write anything it likes on its own website, and it did not write its reviews.

See this breakdown on Captain Electric’s own profile, with the sentences each finding was read from.

Which companies does Home Generator Index exclude or rank last?

Home Generator Index does not know which of these businesses have closed, and this page used to say it dropped them. The records behind this site were collected in August 2026 and the export carries no closed-or-open field, so nothing has ever been dropped for being closed. Check the company's own Google record before you rely on it. Companies with fewer than 3 reviews or a rating below 4.0 still get a profile page for completeness, but every one of them sorts below every company that clears that bar, so they cannot lead a ranked list or appear in the top-rated module on the home page. On a page that lists only a handful of companies they are still on it, at the bottom. 71 of the 480 companies in the register are under the bar today.

Every web address on this site was fetched on August 26, 2026. 8 of them are not linked from their profile: the domain no longer answers, or it answers with a business that has nothing to do with the listing, because a lapsed domain gets rebought. A bot block, a slow response or a “coming soon” page is not counted, because none of those is evidence a site is gone. The company stays listed either way: a lapsed domain is not evidence anyone stopped trading.

That demotion was described here before it existed. Until August 19, 2026 this page said thin and low-rated records "rank last" and the ranking code did not do it, so a company with 5.0 stars from 2 reviews could sit third on a page headed "Best". The code now matches this paragraph.

Where does Home Generator Index's data come from?

Home Generator Index pulls ratings, review counts and business details from public Google Maps profiles, then enriches each record from the company's own website for services, photos and contact details. Market pricing across 8 categories is researched separately and every figure cites a named GTA contractor, manufacturer or authority, so you can trace it. We do not scrape private data or buy reviews.

Sorting a company into one of the 8 categories is AI-assisted. A Google Maps record for a generator business is often filed under a generic label such as electrician or repair service, so automated tooling reads the listing and the company website and proposes a category, and the Standby Power Desk reviews the result before it is published. Automation makes mistakes: if a company is in the wrong category, or listed for work it does not do, email us and we correct it.

No business can pay for a position, a category, or inclusion. There is no advertising on this site, no sponsored placement and no paid tier, so there is nothing for money to influence.

What does "Backup power confirmed" mean on a listing?

Every company here surfaced in a Google Maps search for backup power work somewhere in the Greater Toronto Area. That is the bar for inclusion, and it is a real one: the electrical trade is who pulls the permit, sizes the conductors and ties the transfer switch in. It is not the same as the company telling you it does generators.

So the chip is a separate, narrower claim. A listing carries Backup power confirmedonly when the business says so on its own website: generator installation, generator service, transfer switches, home battery backup, emergency power. Each profile prints the phrase that triggered it, so you can go and look. The phrases are deliberately narrow: bare “battery backup” means a sump pump in the plumbing trade, and bare “battery storage” means a grid-scale asset in the renewables trade, so neither counts on its own.

A company name is not evidence. Calling yourself Reliable Generators tells you what a business wants to be known for, not what it has done, and a name has no author but the owner. Names are why several of these companies are listed at all, and they never earn the chip on their own.

One group can never earn it, and it is worth saying out loud. 40 of these companies have no website for us to read. The chip is a claim sourced to a business’s own website, so a business without one cannot produce the evidence, however much generator work it does. Their absence from the confirmed list says something about our sources and nothing about them. Several are long-established contractors who get their work by phone and word of mouth.

No chip means unknown, not no. Some sites block automated reading, some have no website at all, and plenty of good electrical contractors simply do not list every service they take on. Treat the chip as a shortcut for narrowing a shortlist, then ask on the phone. The one question that settles it: have you installed a standby generator in the last year, and can you give me the ECRA/ESA licence number it went in under?

How often does Home Generator Index refresh its data?

The current Home Generator Index dataset is stamped August 2026. We refresh review data and re-run the ranking on a rolling basis so positions track current reputation, and every page shows a visible last-updated date. If a business is sold, closed or corrects its details, email us and we update the record between scheduled refreshes.

What the licence on a quote means

Any electrical work on the job has to be done by an ECRA/ESA licensed contractor. The licence number belongs on the quote, and you can check it yourself on esasafe.com in about a minute. Where the job touches gas, that is a separate qualification under the TSSA and often a separate company, so establish early who owns which half. Ask for a certificate of liability insurance in your own name before anyone opens a panel. Home Generator Index does not carry out either check on your behalf, and no listing on this site should be read as saying we have.

Who approves the work in Ontario, and is HST in the price?

Assume the number you were quoted excludes the 13% Ontario HST, because most do. Then work through the approvals, because they rarely belong to one company. An ECRA/ESA licensed contractor notifies the Electrical Safety Authority and books the inspection that closes an electrical job out. A TSSA certified gas fitter owns anything connected to a gas supply. Your municipality decides the rest: clearances from windows and doors, setbacks from the lot line, and a noise bylaw that a weekly self test can run into. Get the fees itemised before you sign, and ask whether the notification, the inspection fee and any municipal permit sit inside the figure you were given.

What are the limits of Home Generator Index's rankings?

A ranking is a strong starting point, not a guarantee. The reviews are Google's, not ours, so they carry Google's own biases. Home Generator Index does not verify a contractor's ECRA/ESA electrical licence, TSSA gas credentials, WSIB coverage or liability insurance, and a high rank does not vouch for any single job. Ask for the ECRA/ESA licence number and check it on esasafe.com, confirm who is making the gas connection, get written quotes, and read recent reviews before you hire. Home Generator Index helps you build the shortlist; the due diligence is still yours.