Generator Installation in New Haven: What Size Do I Actually Need?

When a storm hits or the power grid falters, having a reliable generator is more than a convenience—it’s peace of mind. Homeowners considering generator installations / repairs often wonder, “What size generator do I actually need?” The answer depends on your household’s energy demands, your comfort level during outages, and whether you want to power essentials only or your entire home.

Standby vs Portable Generators

The first decision most homeowners face is whether to choose a standby or portable generator. Standby units are permanently installed outside your home and automatically turn on when power is lost. They are designed to handle larger electrical loads, making them the go-to choice for whole-home coverage. Portable generators, on the other hand, are more affordable and flexible but usually power only select circuits or appliances.

If you want seamless, worry-free protection during outages, a standby generator is often worth the investment. However, if budget is a concern or you only need to power basics like your refrigerator and a few outlets, a portable generator may suffice.

Using a Sizing Calculator

One of the most helpful tools for homeowners is a generator sizing calculator. By inputting the wattage of your essential appliances—such as refrigerators, sump pumps, lights, and heating systems—you’ll get a clearer picture of the generator size you need.

For example, a small home with modest demands may get by with a 7,500-watt generator, while a larger property with central air conditioning, multiple refrigerators, and home office equipment could require 20,000 watts or more. A New Haven electrician expert can also perform a professional load assessment, ensuring you get accurate results and avoid undersizing or oversizing your unit.

Whole-Home Generator Costs in CT

Cost is another critical factor when planning for generator installations / repairs. In Connecticut, whole-home generator systems vary widely depending on size, brand, and installation requirements. A smaller standby unit may start around $6,000 to $8,000 including installation, while larger whole-home systems can range upwards of $12,000 to $15,000.

Portable generators are far less expensive upfront, typically running between $500 and $2,500. However, they come with added responsibilities like manual startup, fuel storage, and limited capacity. Homeowners who prioritize convenience, safety, and long-term reliability often find standby generators to be a better long-term investment despite the higher initial cost.

Factors That Influence Sizing

1. Appliances and Systems You Want to Power
   Do you need to keep the lights on and refrigerator running, or do you expect full HVAC coverage and multiple large appliances? Your lifestyle and comfort level play a key role in sizing.
2. Home Size and Layout
   Larger homes naturally consume more power. A whole-home system needs to account for HVAC, water heaters, and multiple kitchen or laundry appliances.
3. Fuel Source
   Generators can run on natural gas, propane, or diesel. Availability of fuel in your neighborhood can affect sizing since certain fuel types support larger wattage units more efficiently.
4. Future-Proofing
   Consider any upcoming home upgrades, like finishing a basement or installing a hot tub. Choosing a slightly larger unit now may save money later.
5. Professional Installation Matters
   Even the best generator is only as reliable as its installation. Hiring a professional ensures your system meets local codes, runs safely, and integrates smoothly with your electrical panel. Beyond installation, ongoing maintenance and timely repairs keep your investment working when you need it most.

For dependable New Haven generator installations / repairs, contact Electrical Services Group LLC today and ensure your home is powered with confidence year-round.