If you own a cottage on Lake of Bays, Peninsula, Vernon, Fairy, Muskoka, Joseph, or Rosseau, you already know the outage profile - storms come through, trees fall on the line, and Hydro One service times to outlying properties can stretch into multi-day territory. A standby generator turns that from a freezer-thaws-everything event into a non-event. The question is not whether to install one; the question is how to size and pick the right standby generator for cottage use, and the answer is more specific than the salespeople will tell you.
The single most common mistake
The most common mistake is buying too much generator. A 22kW Generac Guardian sized to "run everything" sounds reassuring until you look at the math: a typical four-season cottage with a well pump, septic pump, propane furnace blower, fridge, freezer, lighting, and outlets has a real concurrent load of 5kW to 9kW. Even with electric range and electric water heater added (less common at cottages, but it happens), the real concurrent load tops out around 12kW to 14kW. Buying a 22kW unit to run that load is paying for headroom you will never use, and the larger unit consumes more fuel per kWh of useful work - which matters when the propane tank fill bill arrives.
How to size for real
The right way to size a standby generator is to do a load calculation against the appliances and circuits you absolutely need during an outage, then apply the demand factors that the OESC and the manufacturer specs allow. Here is how that math actually plays out for a typical Muskoka cottage:
| Load | Running W | Starting W |
|---|---|---|
| Well pump (1 HP submersible) | 1500 | 4500 |
| Septic / sewage pump | 800 | 2400 |
| Propane furnace blower | 600 | 1800 |
| Fridge | 200 | 600 |
| Chest freezer | 150 | 450 |
| Lighting + small loads | 600 | 600 |
| Internet / WiFi / TV | 150 | 150 |
| Concurrent worst case | ~4000W | ~7500W |
The trick is that not every load starts at the same instant. The well pump and the furnace blower do not typically cycle on at the same moment - so the worst-case running load is lower than the simple sum, and the worst-case starting load is the largest single motor plus the steady-state running load of everything else.
For this typical cottage, a properly programmed 14kW Generac Guardian is the right answer - covers the steady-state with comfortable headroom, handles the well-pump starting surge cleanly, and does not waste fuel on capacity that never gets used.
Generac vs. Kohler vs. Cummins for cottages
All three are good. The differences that matter:
- Generac Guardian (14kW, 18kW, 22kW, 26kW) - largest Canadian dealer network, easiest parts story, most familiar to the next electrician who might service it. The 14kW is the most-installed unit on Muskoka cottages.
- Kohler Residential (14RESAL, 20RESCL, 26RESCL) - measurably quieter at the same kW rating, slightly better cold-start record on Muskoka winters. Worth the premium if the install location is near bedroom windows or your neighbours.
- Cummins QuietConnect - heavy-duty, longer run-hour life, and the choice for commercial sites or larger cottages with serious electrical loads. Premium pricing.
Propane sizing - the part that gets forgotten
A 14kW generator at full load burns about 2 m3 of propane per hour. A typical 1000 L (or 420 lb) cottage propane tank holds enough for roughly 24-30 hours of full-load runtime. Most Muskoka cottage outages are shorter than that - but a multi-day outage can drain a small tank. We recommend a 500 USWG (1900 L) propane tank minimum for a cottage standby installation, sized to the worst-case outage you have actually experienced plus margin. Your gas fitter will spec the regulator and line size to match the generator's BTU draw.
The automatic transfer switch
The transfer switch is what makes a standby generator standby - it senses utility loss, signals the generator to start, and switches the panel from utility to generator power within seconds. We install Generac, Kohler, or Cummins matched transfer switches (whichever brand the generator is), program the time delays appropriately for the local grid behaviour, and configure the exercise cycle (typically 10 minutes once a week). Programmed correctly the homeowner never knows the power went out except for a slight light flicker and the diesel-like sound of the generator running outside.
Maintenance - the thing that determines whether it works when you need it
Generators that never get serviced are the ones that fail on the day you need them. Annual maintenance is non-negotiable:
- Oil and oil filter change (manufacturer schedule)
- Air filter inspection and replacement as needed
- Spark plug inspection / replacement
- Battery test (the battery is what cranks the starter - a dead battery means no start)
- Exercise cycle verification (does it actually run for the scheduled time?)
- Transfer switch test under live conditions (does it actually transfer?)
We offer annual generator service plans across both regions - Huntsville, Bracebridge, Gravenhurst, Port Carling, and Baysville in Muskoka, and Hamilton-Burlington-Oakville in the Golden Horseshoe. For waterfront properties the install often pairs with our cottage electrical work - dock power, seasonal panel resets, and matching the generator capacity to the actual seasonal load.
When to call us
If you have a Muskoka cottage and you are tired of throwing out the freezer contents every storm season, request a generator quote and we will do a proper load calc, recommend the right size, and quote the install in writing.