Generator Sizing Concerns? As professional generator installers in Kingwood and the Greater Houston area, we are frequently asked questions like, “What Size Generator Do I Need For My House?” and “What Size Generator will power my whole house?” —

These are all very valid concerns. After all, the greater Houston area struggles with maintaining a reliable power supply all throughout the year (especially during our frequent and often extreme weather events). 

When the power goes out, a whole house generator isn’t just a luxury—it’s peace of mind. Whether you’re dealing with hurricane-related outages or sudden blackouts from grid strain, having backup power can keep your family safe and your home running smoothly. Unfortunately, choosing the right amount of backup power to meet your home’s unique needs can be intimidating.

But don’t sweat it, our local home generator company has got you covered! Let’s break down home generator sizing one detailed step at a time, so you can feel confident that you are making an informed decision!

Whole House Generator Sizing & Choosing The Right System 

Choosing the right size generator is crucial for both performance and safety. An undersized generator may shut down under heavy load or even cause damage to sensitive electronics. This could leave you in the dark when you need power most. 

On the other hand, an oversized generator installation costs more to purchase, install, and run. It also wears out faster if not used at its optimal capacity. The goal is to get a generator that efficiently and reliably meets your home’s power needs without waste.

How Standby Generator Sizing & Power Are Measured

Generators are measured in kilowatts (kW), a unit of power that indicates how much electricity the system can deliver at once. To size a generator for your whole house, you need to know your total electrical load, or how much power your home uses at peak times. This includes both continuous loads (appliances that run steadily) and surge loads (appliances that need more power to start).

Home Generator Size Calculations  

Every home in the Kingwood and Houston area is unique, so a cookie-cutter approach won’t work. Here’s how to estimate your power needs:

1. List Essential Appliances and Systems: These typically include HVAC units, refrigerators, freezers, ovens, microwaves, well pumps, water heaters, sump pumps, washers and dryers, and lighting. Don’t forget entertainment systems, garage door openers, and medical equipment if applicable.
2. Check the Wattage: Each item will have a wattage rating. Use the label or user manual, or consult an electrician. For example:
   • Central AC (3-5 ton): 3,500-6,000 watts
   • Refrigerator: 600-800 watts
   • Electric Water Heater: 4,000-5,000 watts
   • Lights: 60-600 watts, depending on total usage
   • Washer/Dryer: 3,000-5,000 watts
   • Electric Range: 2,000-5,000 watts
3. Add a Buffer for Startup Loads: Many appliances draw 2-3 times more power during startup. A buffer of 20-25% helps your generator handle these surges without issues.

After adding everything up, most whole-house systems fall between 18kW and 26kW, though larger homes or those with extensive systems may require up to 35kW or more.

How Much Can The Right Size Home Generator Power? 

You don’t necessarily have to power every outlet in your home. Some homeowners in Kingwood prefer to run just the essentials to save on upfront costs. Others want full functionality—including air conditioning, all kitchen appliances, washer and dryer, home office, and even pool systems.

That’s where a load management system comes in. These smart generator systems automatically prioritize what gets power, preventing overload by cycling appliances on and off as needed. This can allow a smaller generator to power a larger home efficiently without compromising comfort.

Standby Generator Sizing Examples

Houston Home Generator Installation Examples:

• 2,000 sq. ft. home with gas heating and basic appliances: 18kW generator provides reliable full coverage
• 3,000 sq. ft. home with electric HVAC, electric range, and water heater: 22kW generator covers most household needs
• 4,500 sq. ft. home with dual HVAC systems, high-end kitchen, and outdoor lighting: 26-30kW generator ensures seamless operation

These are just benchmarks. Every home should be assessed individually to account for usage habits and future expansion.

Home Generator Fuel Type & Performance

Most standby generators run on either natural gas or propane. In Kingwood and the surrounding Houston areas, natural gas is typically preferred for its continuous supply and low maintenance. Propane is ideal for homes in rural or unincorporated areas where gas lines aren’t available. Just be sure your fuel source can deliver the necessary volume for your generator size.

How Much Natural Gas Does a Home Generator Use?

If you’re considering installing a whole home generator in Kingwood or the greater Houston area, it’s smart to understand how much fuel your generator will actually consume. Fuel usage impacts your utility bill and helps you plan for outages with confidence.

Natural gas consumption depends on the generator size and the load it’s supporting. Here’s a breakdown of typical usage:

• 15kW Generator at 50% load: ~150 cubic feet per hour (cfh)
• 22kW Generator at 50% load: ~200–220 cfh
• 30kW Generator at full load: ~300–350 cfh

To put this in perspective, most Texas homes on city gas use 40–100 cfh for heating and appliances. A generator will significantly increase your usage during outages—but only while it’s running.

Other factors that affect fuel consumption:

• Load Level: The more appliances you’re running, the more gas the generator uses. A generator running at 100% load consumes much more fuel than one running at 50%.
• Runtime: A long power outage, like those Houston frequently experiences during hurricane season, means longer generator operation and higher total gas usage.
• Generator Efficiency: Newer, well-maintained units are more fuel-efficient than older models.

Professional Home Generator Sizing Makes All the Difference

Trying to size a generator on your own can lead to costly errors. At Madd Roofing & Generators, we provide free on-site assessments throughout Kingwood, Humble, Atascocita, and the greater Houston region. Our technicians inspect your electrical system, evaluate your appliance loads, and talk through your power priorities to design the perfect generator solution.

We also take into account future needs, such as planned home additions or the desire to run electric vehicles, which are becoming more common in the Houston suburbs.

Why Choose Madd Roofing & Generators in Kingwood, TX?

• Local Generator Installation & Servicing: We understand Houston’s frequent power outages, hurricane threats, and extreme heat. Ensuring you have the comfort and support you deserve, even through the most challenging weather conditions, is our number one priority.  
• Turnkey Standby Generator Installation: We handle permits, inspections, wiring, fuel connections, and final testing. You get a seamless experience from start to finish.
• Top Brands: We install only top-rated brands like Kohler to ensure long-term reliability and performance.
• Reliable Local Support: Our team is always on-call for service and repairs, especially during storm season when the grid is most vulnerable.

Ready for a Full House Generator Installation in Houston?

Don’t leave your comfort and safety up to chance. Whether you live in Kingwood, Porter, New Caney, Spring, or anywhere in the greater Houston area, Madd Roofing & Generators can help you choose and install the perfect size home generator for your needs.

Contact our local generator installers today at 281-577-4065 to schedule your home generator sizing consultation. Protect your home and comfort now by ensuring you will still have power through Texas’s toughest weather!

Time for a generator oil change? Whole-home standby generators, like Kohler, are essential for maintaining power during outages, especially in areas like Houston, where severe storms and hurricanes can disrupt electricity. 

To keep your generator running smoothly and extend its lifespan, regular maintenance is crucial—and that includes routine oil changes.

Here’s a detailed 2025 guide on how to change your generator’s oil –

Why Regular Generator Oil Changes Are Essential

Your generator’s engine operates much like a car engine. Over time, the oil breaks down, collects dirt and debris, and loses its ability to lubricate engine components effectively. Failing to change the oil can lead to:

• Increased wear and tear on engine parts
• Overheating and reduced efficiency
• Potential engine failure when you need your generator most

By performing regular oil changes, you help maintain peak performance and prevent costly generator repairs down the line.

How Often Should You Change Your Generator’s Oil?

The frequency of generator oil changes depends on the manufacturer’s recommendations and how often the generator runs. 

• Kohler and other standby generators typically require an oil change after the first 25 hours of use (for a new unit) and every 100 to 200 hours of operation thereafter. 

If you rely on your generator frequently due to Houston’s unpredictable weather, checking the oil more often is wise.

What Kind of Oil Does a Kohler Home Generator Need?

Choosing the right product for your Kohler home generator oil changes is essential for maintaining optimal performance and equipment longevity:

• Kohler recommends using high-quality synthetic oil, such as SAE 5W-30, for most standby generators. This type of oil provides excellent protection in both high and low temperatures, making it ideal for Houston’s fluctuating climate.
• For extreme conditions, Kohler may suggest using SAE 10W-30 or SAE 15W-40, depending on your generator model and environmental factors. 

Always consult your specific unit’s manual to confirm the best oil type for your home generator. Using the correct generator oil ensures proper lubrication, reduces engine wear, and enhances overall efficiency.

Tools Needed For A Generator Oil Change

Before starting, gather the following generator tools and supplies:

• Use the correct type and amount of oil (check your Kohler generator manual for specifications)
• An oil filter (if required)
• A wrench or oil filter wrench
• An oil drain pan
• A funnel
• Shop rags or paper towels
• Safety gloves and goggles
• A replacement gasket (if applicable)

How to Change Your Generator Oil Step By Step:

Changing your generator’s oil is a straightforward process that ensures smooth operation and longevity. By following these steps, you can keep your generator in optimal condition, preventing unnecessary wear and tear – 

1. Turn Off the Generator and Let It Cool

Safety first! Turn off the generator and allow it to cool completely. Hot oil can cause serious burns, so waiting at least 30 minutes after shutting down the unit is recommended.

2. Locate Your Home Generator’s Oil Drain Plug and Filter

Refer to your Kohler generator’s manual to find the oil drain plug and oil filter location. Most standby generators have an easy-access panel to simplify generator maintenance.

3. Drain the Old Generator Oil

Place an oil drain pan beneath the drain plug. Using a wrench, carefully remove the plug and allow the oil to flow into the pan. Be patient—this process may take a few minutes. Once fully drained, replace the drain plug and ensure it’s secured properly to prevent leaks.

4. Replace the Generator’s Oil Filter (If Applicable)

If your generator has an oil filter, use an oil filter wrench to remove the old one. Before installing the new filter, apply a thin layer of fresh oil to the rubber gasket to ensure a proper seal. Hand-tighten the new filter, but avoid over-tightening, which can damage the gasket.

5. Add The New Generator Oil

Using a funnel, pour the recommended type and amount of oil into the oil fill port. Check the oil level with the dipstick, ensuring it falls within the acceptable range. Add more if necessary, but avoid overfilling, as this can cause engine problems.

6. Dispose of the Old Generator Oil Properly

Used motor oil is hazardous and should never be poured down the drain or into the trash. Instead, take it to a local recycling center or an auto parts store that accepts used oil for proper disposal.

7. Restart Your Generator and Check for Oil Leaks

Turn the generator back on and let it run for a few minutes. Check for any leaks around the oil drain plug and filter. If everything looks good, your generator is ready to go!

Trust The Houston Generator Experts

At Madd Roofing & Generators, we provide comprehensive home generator installation services to ensure your home is always prepared for Houston’s power outages. For professional installation or replacement in the Greater Houston area, contact us today at 281-577-4065!

Researching whole-home generators costs in Texas? If you live in The Lone Star State, you know that the weather can be unpredictable, from scorching summers to unexpected winter storms. Power outages can strike anytime, leaving you without lights, heating or cooling, and essential appliances. 

That’s where a whole home generator comes in—a reliable solution to keep your home powered through any outage. But how much does a whole home generator cost in Texas?

Madd Roofing, your trusted roofing and generator installation experts, are here to break it down for you –

Factors That Influence Whole-Home Generator Costs in Texas 

The cost of installing a whole-home generator in Texas depends on several key factors:

1. Whole Home Generator Sizes

• Generators are sized based on the amount of power they can produce, measured in kilowatts (kW). Smaller homes may need a 10-14 kW generator, while larger homes may require systems in the 20-24 kW range or higher.

The Average Whole Home Generator Costs:

• 10-14 kW: $3,000 to $5,000+
• 20-24 kW: $7,000 to $9,000+
• Larger systems: $10,000+

2. Home Generator Fuel Types

• Standby generators usually run on natural gas or propane. If your home already has a natural gas connection, installation may be more affordable than setting up a propane system.

3. Home Generator Installation Costs

• Professional installation is essential to ensure your generator works safely and efficiently. Madd Roofing offers expert generator installation services in Kingwood, TX, and beyond, handling everything from wiring to connecting the fuel source.
• Installation costs generally range from $6,000 to $8,000+, depending on the complexity of the setup.

4. Additional Equipment

• You may need accessories like automatic transfer switches (ATS), which manage the seamless transition from utility power to generator power. An ATS typically adds anywhere from $600 to $2,000+ to the cost.

5. Permits and Inspections

• Texas regulations may require permits and inspections for generator installations. Permit fees vary by municipality, typically adding a few hundred dollars to your budget.

Average Standby Generator Cost Ranges, Including Installation

In Texas, the total cost of a whole-home generator, including the unit and installation, typically ranges from $13,000 to $20,000 or more. Here’s a breakdown for an average-sized home:

• Small home (10-14 kW generator): $13,000 to $15,000+
• Medium home (20-24 kW generator): $15,000 to $16,000+
• Large home (25 kW+ generator): $16,000 to $20,000+

How Home Generators Work

A whole home generator, also known as a standby generator, is a permanently installed system that provides automatic backup power to your home. Unlike portable generators, standby systems connect directly to your home’s electrical panel and fuel supply, typically natural gas or propane. 

When a power outage occurs, the generator activates within seconds, ensuring your home remains fully functional. These systems have proven invaluable for Texas homeowners who want peace of mind during power disruptions. 

How to Choose the Right Generator For Your Home

When investing in a whole home generator, consider these tips:

1. Assess Your Power Needs: Calculate the wattage required to power your essential appliances and systems during an outage.
2. Choose a Trusted Brand: Look for reliable brands like Kohler, which offer durable and efficient generators.
3. Consult Professionals: Madd Roofing can help you evaluate your needs and recommend the best generator for your home and budget.

Why Invest in a Whole-Home Generator in Texas?

While the upfront cost may seem significant, the benefits of a whole-home generator far outweigh the expense. Here’s why Texas homeowners are making the investment:

• Uninterrupted Power: From keeping the lights on to maintaining heating or cooling, a generator ensures your family stays comfortable and safe during outages.
• Home Value Boost: Standby generators are a desirable feature for homebuyers, increasing your property value.
• Protection for Appliances: A generator can prevent damage to appliances caused by power surges during outages or when power is restored.
• Peace of Mind: Texas weather is unpredictable, but with a whole home generator, you’ll never have to worry about being left in the dark.

Why Choose Madd Roofing for Your Standby Generator Installation?

At Madd Roofing, we’re more than just your trusted roofing experts. We specialize in professional whole-home generator installation throughout Kingwood, TX, and the surrounding areas. Here’s what sets us apart:

• Local Expertise: As a Kingwood-based company, we understand the unique power needs of Texas homes.
• Comprehensive Services: From selecting the right generator to installation and maintenance, we handle every step of the process.
• Quality and Safety: Our team is committed to delivering top-notch workmanship, ensuring your generator operates safely and efficiently.
• Customer Satisfaction: We take pride in our reputation for excellent service and are dedicated to exceeding your expectations.

Call Madd Roofing – The Home Generator Installation Experts 

A whole home generator is a smart investment for Texas homeowners, providing reliable power, increased home value, and peace of mind. While the cost can vary based on size, fuel type, and installation, the benefits far outweigh the expense.

If you’re ready to install a whole home generator in Kingwood, TX, or the surrounding areas, Madd Roofing is here to help. Contact us today at 281-577-4065 for a consultation, and let us keep your home powered, no matter the weather.

By partnering with Madd Roofing, you’ll gain a trusted local team that prioritizes quality, safety, and customer satisfaction. 

Don’t wait until the next outage—secure your home’s power today!