Side-by-side
| Factor | Inverter generator | Conventional generator |
|---|---|---|
| Power quality | Clean, low distortion — safe for electronics and furnace boards | Rougher power on many models; check the specs |
| Noise | Quieter, especially at light load | Louder; runs at full speed |
| Fuel use | Lower at light loads (eco mode) | Higher at light loads |
| Price per watt | Higher | Lower — more watts for the money |
| Size and weight | Compact, enclosed | Bigger open frame |
| Best for | Fridge, furnace, electronics, quiet neighbourhoods | Big loads, tools, budget whole-house plans |
| Carbon monoxide | Both produce deadly CO — outdoors only, 6 m (20 ft) from openings | |
Our take for Canadian homes
For outage backup — fridge, furnace blower, sump pump, Wi-Fi and phones — an inverter is the safer bet for sensitive electronics and easier on neighbours during a multi-day ice storm. A conventional generator makes sense if you need lots of watts on a tight budget and your loads are mostly motors and tools.
Inverter picks we track Imported alternative
All three are inverter generators that shipped from Amazon when we checked.
| Photo | Product | Type / size | CAD price | Rating | Best for | Shop |
|---|---|---|---|---|---|---|
 |
PowerSmart 2500W inverter Imported · budget |
Gas inverter · 2,500W starting / 1,900W running | $386.99 CAD | Fridge + essentials on a budget | PowerSmart 2500 — $386.99 CAD · 4.5★ (1,211) · Ships from Amazon | |
 |
Aceup 4000W gas inverter Imported alternative |
Gas inverter · 4,000W starting / 3,200W running | $542.99 CAD | More headroom for a sump pump or furnace blower | Aceup 4000 gas — $542.99 CAD · 4.6★ (393) · Ships from Amazon | |
 |
Aceup 4000W Dual Fuel Imported alternative |
Dual-fuel inverter · 3,200W gas / 3,000W propane running | $650.99 CAD | Propane backup when gas stations are closed | Aceup Dual Fuel — $650.99 CAD · 4.6★ (393) · Ships from Amazon |
PowerSmart 2500 — $386.99 CAD · 4.5★ (1,211) · Ships from Amazon
Imported alternativeAceup 4000 gas — $542.99 CAD · 4.6★ (393) · Ships from Amazon
Imported alternativeAceup Dual Fuel — $650.99 CAD · 4.6★ (393) · Ships from Amazon
Prices, star ratings and review counts were checked on Amazon.ca on Sep 18, 2026 (ET) and can change. Products marked Imported alternative are not made in Canada.
FAQ
Do I need an inverter generator for a furnace?
It’s the safer choice. Furnace control boards can be sensitive to rough power, and inverter generators produce clean, low-distortion power. Your HVAC technician or electrician can confirm what your furnace needs.
Is an inverter generator safe to run indoors?
No. Inverter generators are quieter, but they still produce deadly carbon monoxide. Run every fuel generator outdoors, at least 6 metres (20 feet) from windows, doors and vents.
Why do inverter generators cost more?
They use electronics to convert power into a clean, stable output and throttle the engine to match demand. You pay more per watt, but get quieter running, better fuel economy and electronics-safe power.