What Size Generator Do You Need?

Whether you’re bracing for a storm, powering a jobsite, or just want peace of mind during outages, having theright-size generator is key. Too small and you’ll overload it. Too big and you’ve overspent. So—what size generator do you need?

Let’s walk through how to find the right fit for your home, jobsite, or anywhere in between.

1. Start with Your Power Needs

First, determine what you need to power during an outage or project. Are you just keeping the fridge and lights on—or running an entire HVAC system and power tools?

Here's a quick breakdown:

2. Know the Generator Types

There are three main types of generators, and sizing depends on how you plan to use them:

• Portable Generators - Great for backup power or jobsites. Usually range from 1,000 to 10,000 watts.
• Inverter Generators - Quieter, cleaner power for sensitive electronics. Ideal for camping, events, or light backup.
• Standby Generators - Permanently installed and can power a whole home automatically. Output ranges from 7,000 to 24,000+ watts.

3. Do the Math: Running vs. Starting Watts

Generators are rated by their running watts (continuous power) and starting watts(brief surge needed to start appliances).

Example:

If your total running watts = 4,000 and your highest starting surge = 2,000, look for a generator that handles at least 6,000 starting watts.

💡 Pro Tip: Always size up a little for safety and future flexibility.

4. Consider Fuel Type & Runtime

Generators run on gasoline, propane, diesel, or natural gas. Some even offer dual-fuel capability, which adds flexibility during emergencies.

Also check:

• Tank size
• Runtime at 50% load
• Noise level (measured in dB)

6. Still Unsure? Let Us Help.

Choosing the right generator doesn’t have to be complicated. Contact us or check out our complete generator collection to get started.