What Size Cummins Generator Can Power My Home?

Finding the Right Power Solution for Your Household

When it comes to keeping your home running during a power outage, choosing the right generator size is one of the most important decisions you’ll make. Too small, and it won’t handle your essential appliances. Too large, and you’ll spend more on fuel and installation than necessary.

Understanding Generator Sizing

Generator sizing is the process of matching your home’s electrical demand with a generator’s available power output, typically measured in kVA (kilovolt-amperes) or kW (kilowatts). Choosing the right size isn’t just about keeping the lights on; it’s about ensuring your generator runs efficiently, safely, and reliably for years to come.

A correctly sized generator should be able to power your essential circuits, such as lighting, heating, refrigeration, and water systems, without becoming overloaded or running inefficiently. This balance protects both the generator and your household appliances from unnecessary strain.

We have a wide range of GFE Cummins Powered Diesel Generators you can choose from once you know what size you need. 

It’s Also Important to Consider Two Key Factors:

• Running load: the continuous power required to keep your home’s systems operating normally.
• Starting load: the short surge of additional power needed when certain appliances, like fridges, pumps, or air conditioning units, first start up.

Getting this balance right ensures smooth operation, avoids costly oversizing, and maximises the lifespan and fuel efficiency of your generator.

Typical Home Power Requirements

While every home is different, here’s a general guide to help you estimate the size you’ll need:

Tip: Always allow a little extra capacity for future appliances or system upgrades. Running a generator at around 60–70% load is ideal for efficiency and longevity.

Why Choose a GFE Cummins Powered Generator?

Cummins engines are known worldwide for their fuel efficiency, reliability, and low maintenance requirements. When paired with Stamford alternators, they deliver stable, high-quality power suitable for both sensitive electronics and heavy-duty household systems.

Some Key Advantages:

• Proven reliability – Trusted by homeowners and businesses alike.
• Fuel efficiency – Advanced combustion systems mean lower running costs.
• Quiet operation – Sound-attenuated canopies reduce noise for residential use.
• Long service life – Built for years of dependable standby power.

Whether you need a compact single-phase generator for essentials or a three-phase model to cover a larger home, there’s a GFE Cummins Powered Generator that fits perfectly.

Expert Help with Choosing the Right Size

At GFE Power Products, our team can help you calculate your exact power requirements considering all the essentials:

• What circuits you want backed up
• Whether you need automatic or manual transfer
• How much load diversity your home has (not everything runs at once)

We’ll then recommend the most efficient and cost-effective generator for your needs, ensuring your home stays powered, safe, and comfortable, whatever happens to the grid.

Ready to Find Your Perfect Fit?

If you’re unsure what size Cummins generator your home needs, talk to our team, we’ll guide you through every step, from load calculation to installation and maintenance planning. Contact us today! 

Phone: +44 (0)1386 335007
Email: sales@gfepowerproducts.com