How much does an annual generator service visit cost in Ontario?

For a 7-22 kW air-cooled unit, A1 Generator Monitoring charges $320 per visit; for a 22-100 kW liquid-cooled unit, it charges $439. The rate card shown on the page is dated May 2020. TrueSource Generators lists a Canada-wide maintenance plan at $200 to $450 a year, a range that covers both of those prices.

Is the annual load bank test part of the service visit?

No published scope collected here includes it. Both CSA Standard C282-19 and the Ontario Fire Code call for an annual two-hour full-load bank test on life-safety standby generators, but Ronnie's Generator Service and A1 Generator Monitoring each quote it on request rather than listing a price, so it is a separate line item.

How much does a standby generator battery cost to replace?

Platinum Electrical Contractors, which trades as Generator Experts in Cookstown, charges $185 for the part alone for a Generac Group 26R 12V battery. Grounded Electric lists battery parts from $100 to $300 as a US reference point. The maintenance guidance collected states that batteries should be replaced every three to five years under normal conditions.

How many companies in this index list generator repair and maintenance?

Seven of the 480 records show the category, and standby generator installation appears on six of those seven. Those records have review counts ranging from 20 down to 1. The index logs the categories a company claims, not the full range of work it performs, so seven is a count of claims.

What a Generator Service Visit Should Cover

Last updated:August 19, 2026ByStandby Power Desk

The one published scope in Ontario, with its price

Most generator service companies in the GTA disclose what they do but not what it costs. Ronnie's Generator Service, Hudson HVAC and T&T Power Group all provide descriptions of their services, and none of them publishes a per-visit rate. Among the material collected for this site, A1 Generator Monitoring is the exception: it publishes a rate card that contains two tiers and a written scope beside them.

Those two tiers are priced at $320 per visit for a 7-22 kW air-cooled standby unit and $439 per visit for a 22-100 kW liquid-cooled unit. What separates these tiers is cooling type and size, not any change in the work performed. Both figures come with a significant caveat: the page itself has a May 2020 date, even though the copyright footer is newer, so this figure is a several-year-old reference point rather than a confirmed current rate.

That figure still compares well with the wider published ranges. TrueSource Generators lists a Canada-wide annual maintenance plan at $200 to $450 per year, a span that contains both A1 figures. Barrie Heating & Cooling sets the price of an annual maintenance contract for a residential or light-commercial unit at $200 to $650 per year. Anyone with only a verbal quote and nothing else can set it beside at least these three published numbers, and HST at 13% applies on top of all of them in Ontario.

The checklist, item by item

A1 Generator Monitoring has published an Ontario scope that identifies four things. First on that list is an oil and filter change. According to the pricing guidance that was collected, filters are an annual item, and older units with more run hours need part replacement more often. This line therefore recurs whether the generator ran during the year or sat idle.

The second item is a fuel filter change. The work involved depends on the fuel type: propane and natural gas units have different filter and fuel-system service needs, and in Ontario any service work on a gas-fired unit that touches the fuel system must be done by a TSSA-licensed gas technician. For electrical and control work on the same machine, ESA licensing applies instead. One service visit can therefore cover two licensing regimes, and the index does not record which licences any listed company holds.

The third is a building load test, in which the unit is run against the actual load it is installed to carry rather than being started unloaded. The fourth is electrical, mechanical and electronic system testing, and it comes with a detailed report. That report is what a building owner keeps, and it is the only lasting output of the visit.

The age and run hours of a unit affect how often those four items result in replacement rather than inspection. The collected guidance describes the starting battery as a three-to-five-year part and filters as annual items, so a unit that has been in service for a decade will generate more parts lines on the same visit than a new one.

The published list consists of only four items, so it is a short list. Any task that a quote adds beyond those four is a task with no Ontario price published anywhere in this dataset.

Annual load bank testing sits outside that scope

Life-safety standby generators must undergo an annual two-hour full-load bank test under CSA Standard C282-19 and the Ontario Fire Code. This obligation is a compliance requirement, not a discretionary task, and it differs from the building load test named in A1's scope because a load bank applies a controlled artificial load rather than the building's current draw.

None of the Ontario providers in this dataset publishes a price for it. Both Ronnie's Generator Service Ltd in Mississauga, rated 3.8 from 17 reviews, and A1 Generator Monitoring offer load bank testing and provide quotes only on request. That leaves a mandatory annual line item with no published value anywhere in the data, the single largest gap in the maintenance pricing collected for this site.

Because the requirement applies to life-safety standby generators, a residential unit that backs up a house is a different matter from a generator that supplies exit lighting, a fire alarm, or an elevator in a commercial or institutional building. A quotation that includes load bank testing and one that leaves it out describe two different jobs, and the base annual service figures above apply to the one without it.

A contract against a one-off call

In this market, the cost difference between a booked appointment and an unscheduled call is significant. Amps Logics Electric sets the minimum service call fee for the GTA at $150 to $300; this usually includes travel and the first hour of diagnosis before any repair work starts. A licensed GTA electrician or technician normally charges $95 to $140 per hour, a specialist or master electrician charges $120 to $160 and above, and emergency or after-hours work charges $180 to $300 and above per hour.

Place those next to the scheduled numbers and the arithmetic becomes clear without any calculation. For a bundled plan, TrueSource Generators quotes $200 to $450 per year. Amps Logics Electric's minimum call fee alone begins at $150 to $300, and that is before parts, labour after the first hour, or a second visit if a part has to be ordered. If a failed start is found during an outage, the emergency tier applies instead of the standard one.

The published guidance also explains that a bundled annual plan can lower the effective per-visit cost compared with one-off emergency calls, and that two plan prices differ based on whether the plan includes one or two visits a year and whether load bank testing is bundled or billed separately. The full rate table is available on the generator repair and maintenance cost page, and general trade rates are listed on the electrician rates page.

Parts that come due on a schedule

The timing of replacement is most predictable for the starting battery. For the part alone, Platinum Electrical Contractors, trading as Generator Experts in Cookstown, charges $185 for a Generac Group 26R 12V battery; Grounded Electric lists battery parts at $100 to $300 as a US benchmark, consistent with the Ontario figure. According to the maintenance guidance collected for this site, the replacement interval is three to five years under normal conditions, and replacement should happen sooner if a load test shows weak cranking performance.

After the battery, published repair pricing is sparse and comes from the United States. Central HTG quotes a voltage regulator replacement at $100 to $300, a carburetor replacement or repair at $100 to $500, and a control board replacement including parts and basic labour at $200 to $1,000, presenting all three as US benchmarks. We found and confirmed no Ontario-specific published pricing for those individual repairs, so the figures serve as a guide rather than local rates.

In the collected guidance, two additional items affect a repair bill without showing up on any rate card. The unit's accessibility affects the diagnostic time required before a repair can be quoted at all, and selecting OEM Generac, Kohler or Cummins parts instead of aftermarket equivalents alters both the price of the part and its delivery time. No Ontario source examined for this site lists either item as a dollar figure, so both appear only in the final invoice.

A part price does not become an invoice until labour is added. The collected guidance states explicitly that once labour and a service-call minimum of $150 to $300 are added, a $200 part can become a $500-plus invoice, and that parts availability changes the total as well, since a technician who stocks common parts avoids the second visit that a special order requires.

How few companies in this index list the work

Across the 480 companies in the index, seven are listed under the generator repair and maintenance category: A1 Generator Monitoring, with no service area recorded, at 5 from 20 reviews; Ontario Generator Systems in Georgina at 4.8 from 19; Ronnie's Generator Service Ltd in Mississauga at 3.8 from 17; Premium Generator Service in Georgina at 5 from 12; Aran control in Bolton at 5 from 7; T&T Power Group in Brampton at 3.8 from 5; and Genrep Ltd/Ltee in York at 5 from 1.

Of the seven, six list standby generator installation as well, a category that contains 56 records. Ronnie's Generator Service stands alone among the seven in listing maintenance but not installation. No business in the group has more than 20 reviews; the full index has a median of 28 and a maximum of 29,834, so all visible service history for this category is less than what one mid-sized electrical contractor holds.

The count consists of claims. The index contains the categories each company chooses to include, not the full range of work it performs, and a share of the 369 companies under electricians will service a generator without filing themselves under a generator category. The seven-record count shows how few companies in this market list maintenance as a named service line. That is a separate and more limited finding.

Frequently asked questions

What is included in a standard annual generator service visit?: For this site, A1 Generator Monitoring publishes an Ontario scope that includes an oil and filter change, a fuel filter change, a building load test, and electrical, mechanical and electronic system testing with a detailed report. That is the only published scope collected for the site, and it is the only set of tasks that can be quoted with a price attached.
How much does an annual generator service visit cost in Ontario?: For a 7-22 kW air-cooled unit, A1 Generator Monitoring charges $320 per visit; for a 22-100 kW liquid-cooled unit, it charges $439. The rate card shown on the page is dated May 2020. TrueSource Generators lists a Canada-wide maintenance plan at $200 to $450 a year, a range that covers both of those prices.
Is the annual load bank test part of the service visit?: No published scope collected here includes it. Both CSA Standard C282-19 and the Ontario Fire Code call for an annual two-hour full-load bank test on life-safety standby generators, but Ronnie's Generator Service and A1 Generator Monitoring each quote it on request rather than listing a price, so it is a separate line item.
How much does a standby generator battery cost to replace?: Platinum Electrical Contractors, which trades as Generator Experts in Cookstown, charges $185 for the part alone for a Generac Group 26R 12V battery. Grounded Electric lists battery parts from $100 to $300 as a US reference point. The maintenance guidance collected states that batteries should be replaced every three to five years under normal conditions.
How many companies in this index list generator repair and maintenance?: Seven of the 480 records show the category, and standby generator installation appears on six of those seven. Those records have review counts ranging from 20 down to 1. The index logs the categories a company claims, not the full range of work it performs, so seven is a count of claims.

Figures on this page, and where each came from

A1 Generator Monitoring charges $320 for an annual visit on a 7-22 kW air-cooled unit and $439 for a 22-100 kW liquid-cooled unit. The service includes an oil and filter change, the fuel filter, a building load test, and electrical, mechanical and electronic system testing, with a report.: A1 Generator Monitoring - Residential Generator Service Pricing
TrueSource Generators prices its Canada-wide annual maintenance plan at $200 to $450 per year, a range that covers both A1 figures.: TrueSource Generators - Generac Generator Cost Canada 2026 Guide
For a residential or light-commercial unit, Barrie Heating & Cooling charges $200 to $650 per year for an annual maintenance contract.: Barrie Heating & Cooling
The minimum service call fee across the GTA is $150 to $300, according to Amps Logics Electric, and it usually pays for travel and the first hour of diagnostic work before repairs start.: Amps Logics Electric - How Much Do Electricians Cost in Toronto & GTA, 2026 Pricing Guide