Choosing the right size backup generator for a New Jersey home involves more than picking a model off a shelf. The size you need depends on your home’s square footage, the appliances you want to keep running during an outage, and local installation requirements. A properly sized generator ensures you have reliable power without overspending on capacity you will not use. Below we walk through the factors that determine the correct generator size for homes in New Jersey, including practical advice from local electrical professionals.

Understanding Your Home’s Power Needs During an Outage

Before looking at generator models, take stock of what you want to power. For most homeowners, the priority is keeping essential systems running, lights, refrigeration, and heating controls. A generator that covers these basics is often called a mid-range system. According to one New Jersey electrical contractor, a 2,000-square-foot home in the state typically requires a mid-range backup generator. This level of capacity allows you to run key circuits without trying to power every outlet and appliance at once.

Load planning focuses on three categories: lighting, refrigeration, and heating controls. If you have a well pump, sump pump, or medical equipment, those should also be added to your essential list. A simple way to start is to list the wattage of each item and add them up. Keep in mind that motors (like furnace fans and refrigerator compressors) require extra starting wattage, so the generator must be able to handle those surges.

The Role of Load Calculation in Generator Sizing

A professional load calculation is a standard part of any whole-house generator installation. A typical installation includes load calculation and generator sizing, concrete pad preparation, and automatic transfer switch installation. The load calculation determines the total wattage your generator must supply. It is not something to guess at. Bauer Electric Inc can measure the electrical demands of your home, account for startup surges, and recommend a generator that can handle the load safely.

Skipping this step can lead to a generator that is too small to start your equipment or too large, which wastes fuel and money. In New Jersey, where winter storms and summer thunderstorms can cause multi-day outages, a reliable system is worth the professional investment.

What to Expect During a Professional Load Calculation

The electrician will review your home’s electrical panel and list all circuits you want backed up. They will note the running wattage and starting wattage of each device. For heating systems, the type matters, a gas furnace uses less power than an electric heat pump or baseboard heaters. The final calculation produces a number in kilowatts (kW), which directly guides the generator size. This process also ensures the automatic transfer switch is correctly sized to handle the power flow.

Choosing the Right Generator Size in Kilowatts

Generator sizes are measured in kilowatts. A 5 kW generator can power some essential items during an emergency, think a refrigerator, a few lights, and a small window air conditioner or a furnace blower. A 20 kW generator, on the other hand, can power an entire home, including central air conditioning, electric range, and other large appliances.

For a typical New Jersey home around 2,000 square feet, the right generator falls in the mid-range, which generally corresponds to a 10–13 kW or similar unit depending on the load. However, the research available does not specify an exact kW for a 2,000-square-foot home. The best approach is to rely on a professional load calculation rather than a square-footage rule of thumb. Homes with electric heat, well pumps, or multiple air conditioning zones will need a larger unit than similar-sized homes with gas heat.

Mid-Range vs. Whole-Home Generators

A mid-range generator covers your essential circuits but may not power large appliances like a central air conditioner or electric oven. A whole-home generator, typically 20 kW or larger, can power everything. The choice depends on your budget and how much inconvenience you can tolerate during an outage. If you work from home, need medical equipment, or want full comfort, a larger unit may be worth the extra cost. If you only need to keep the heat running, refrigerator cold, and a few lights on, a mid-range generator is usually sufficient.

Installation Considerations for New Jersey Homes

Where you place the generator matters. Local municipal codes often specify setback distances from buildings and property lines. For example, in Wall, New Jersey, standby generators are required to be 5 feet from any combustible building, except where the weatherproof enclosure is constructed of noncombustible materials. Other towns may have different rules. Always check with your local building department or consult a licensed electrician like Bauer Electric Inc. who is familiar with your area’s codes.

A typical generator installation includes a concrete pad to provide a stable, level base. The automatic transfer switch is mounted near your main electrical panel. The electrician will also run fuel lines, natural gas or propane, and connect the generator to the transfer switch. All work must comply with the National Electrical Code and any local amendments.

Permitting and Inspections

Most New Jersey municipalities require a permit for generator installation. The permit process ensures that the setup meets safety standards. Your installer should handle the permitting and schedule the required inspections. Using a qualified electrical contractor with experience in generator installations will help the process go smoothly and keep your home safe.

Frequently Asked Questions

How do I determine what size generator I need for my New Jersey home?

Start by listing the appliances and systems you want to power during an outage. Then have a licensed electrician like Bauer Gen Systems perform a load calculation. This measures the total wattage required, including startup surges. A professional calculation is more accurate than any online calculator because it accounts for your specific home’s wiring and equipment.

Can a 5 kW generator power my entire home?

No. A 5 kW generator can run only essential items such as a refrigerator, a few lights, and a furnace blower or small window air conditioner. It is not enough to power central air conditioning, electric ranges, well pumps, or multiple large appliances. For whole-home coverage, you typically need a 20 kW or larger generator.

What is the distance requirement for placing a generator from my house in New Jersey?

Requirements vary by municipality. For example, Wall, New Jersey requires standby generators to be at least 5 feet from any combustible building unless the generator enclosure is made of noncombustible materials. Check with your local building department or consult your installer to confirm the setback rule in your town.

Is a concrete pad required for generator installation?

Yes, a concrete pad is a standard part of generator installation. It provides a stable, level surface that keeps the generator secure and helps reduce vibration. The pad also elevates the unit to keep it clear of ground moisture and debris. Your installer will pour the pad as part of the setup process.

Who Is Bauer Electric Inc.?

Since 1973, Bauer Electric Inc. has been the go-to electrical contractor for commercial, industrial, and residential projects throughout the region. What started as a small family business has grown into a full-service electrical services company with a reputation for quality, reliability, and professionalism.

Our team of licensed electricians brings decades of combined experience to every project. Whether it’s a complex industrial installation, a commercial building retrofit, or a residential service upgrade, we approach each job with the same commitment to excellence.

As a certified Generac contractor, we specialize in generator installation and maintenance, ensuring our clients have reliable backup power when they need it most. Bauer Electric is a certified Generac Dealer. Contact them today at (609)-587-1195