When you're running a jobsite, power isn't optional—it's essential. Whether you're framing a house in a new subdivision, running tools at a remote location, or working through a grid outage, the right generator keeps your crew productive and your timeline on track.
But not all generators are created equal. Choosing the wrong one can mean constant refueling, noise complaints from neighbors, or worse—not enough power to run your equipment when you need it most.
Here's what contractors need to know about choosing jobsite power, and how REX generators stack up for the work you do.
What Do You Actually Need to Power?
Before you buy, make a list of what you'll be running simultaneously. Different tools have different power demands, and understanding wattage requirements is the first step to choosing the right generator.
Common jobsite power needs:
- Circular saw: 1,400W
- Miter saw: 1,800W
- Table saw: 1,800–2,400W
- Air compressor (1 HP): 1,600W starting, 800W running
- Welder (small): 3,000–4,000W
- Concrete mixer: 1,500W
- Job lights: 500–1,000W
Add up the running wattage of everything you'll use at once, then factor in starting wattage (some tools draw 2-3x more power when they kick on). This total is your minimum generator capacity.
Open Frame vs. Inverter: What's the Difference?
Contractors typically choose between two types of generators: open frame and inverter. Here's the breakdown.
Open Frame Generators: Maximum Power, Built for Heavy Loads
Open frame generators are the workhorses of the jobsite. They're designed to deliver high wattage output, handle heavy tools, and run for extended periods under load.
Pros:
- High power output (3,500W–7,500W+)
- Lower cost per watt
- Rugged, durable construction
- Can handle multiple heavy tools at once
Cons:
- Louder operation (80–90 dB)
- Heavier and less portable
- Less fuel-efficient at partial loads
Best for: Framers, electricians, concrete crews, anyone running multiple power tools or heavy equipment simultaneously.
REX Open Frame Options:
REX 3500H Open Frame Generator – 3,500W
Compact and affordable, the 3500H is perfect for smaller crews or lighter tool loads. Run a miter saw, circular saw, and job lights without breaking a sweat. Now on sale for $531.57 CAD (reg. $590.63).
REX 7500D-H Open Frame Generator – 7,500W
Serious power for serious jobs. The 7500D-H handles welders, air compressors, table saws, and multiple tools at once. Electric start makes firing it up fast, and the steel frame is built to take a beating on the jobsite. Now on sale for $1,185.58 CAD (reg. $1,190.60).
Inverter Generators: Quiet, Clean Power for Residential Sites
Inverter generators use advanced electronics to produce stable, clean power at lower noise levels. They're more fuel-efficient and lighter, making them ideal for residential jobsites where noise restrictions apply.
Pros:
- Quiet operation (53–65 dB)
- Fuel-efficient (run longer on less gas)
- Clean power safe for electronics (laptops, phones, battery chargers)
- Compact and portable
Cons:
- Lower maximum wattage
- Higher upfront cost
- Not ideal for running multiple heavy tools simultaneously
Best for: Residential renovations, finish carpentry, sites with noise bylaws, running sensitive electronics.
REX Silent Inverter Options:
REX 2250IS Silent Inverter Generator – 2,250W
The 2250IS is perfect for smaller residential jobs where you need power without disturbing the neighborhood. Run a miter saw, drill, and charger simultaneously at just 53 dB (quieter than a normal conversation). Lightweight and portable. Now on sale for $828.28 CAD (reg. $920.31).
REX 4500IE Silent Inverter Generator – 4,500W
Step up to the 4500IE when you need more capacity but still want quiet operation. Power a table saw, air compressor, and lights without waking up the client's kids. Fuel-efficient runtime and electric start make this a go-to for contractors who work in noise-sensitive areas. Now on sale for $1,455.82 CAD (reg. $1,617.58).
Which Generator Should You Choose?
Here's a quick decision guide based on your jobsite needs:
| Your Situation | Recommended Generator |
|---|---|
| Running multiple heavy tools (saws, compressors, welders) | REX 7500D-H |
| Medium loads, occasional heavy tool use | REX 3500H or 4500IE |
| Residential sites with noise restrictions | REX 4500IE or 2250IS |
| Light finish work, charging tools, running lights | REX 2250IS |
| Off-grid or remote jobsites needing max power | REX 7500D-H |
Don't Forget: Generator Maintenance Keeps You Running
A generator is only as reliable as the maintenance you put into it. Here are the basics every contractor should follow:
- Check oil before every use – Low oil is the #1 cause of generator failure
- Run it monthly – Even if you're not using it on a job, fire it up for 15 minutes to keep the engine healthy
- Use fuel stabilizer – Prevents gum buildup in the carburetor during storage
- Clean the air filter regularly – Especially on dusty jobsites
- Store it properly – Keep it covered and in a dry location
Ready to Power Your Jobsite?
REX generators are built for contractors who need reliable power without the premium price tag. Whether you're running a full crew or working solo, we've got the wattage you need—and right now, they're on sale.
Shop the REX Generator Sale:
- REX 2250IS Silent Inverter – $828.28
- REX 4500IE Silent Inverter – $1,455.82
- REX 3500H Open Frame – $531.57
- REX 7500D-H Open Frame – $1,185.58
Power up. Get to work. Keep the job moving.
What generator questions do you have? Drop a comment below or contact us—we're here to help you choose the right power solution for your jobsite.
