A Guide to Choosing the Right Backup Power
When the power goes out, having a reliable generator can keep your home or business running smoothly. But one of the most common questions homeowners ask is, “What size generator do I need?” The right generator size depends on your energy needs, whether you’re looking to power essential appliances or keep your entire home running during an outage.
Why Generator Size Matters
Choosing the right generator size is crucial for efficiency, safety, and longevity. A generator that’s too small won’t handle your power load, causing overload and potential damage. On the other hand, an oversized generator wastes fuel and costs more upfront.
How to Determine the Right Generator Size
To find the best generator for your needs, follow these steps:
- List Essential Appliances – Identify the appliances and devices you need during a power outage. Common essentials include refrigerators, HVAC systems, sump pumps, water heaters, and medical equipment.
- Calculate Power Requirements – Check the wattage requirements for each appliance. Most devices have a label showing the starting (surge) and running (continuous) wattage.
- Add Up Wattage – Total the wattage of all appliances you plan to run simultaneously. This will help determine the generator capacity you need.
- Choose a Generator with a Safety Margin – Select a generator with slightly more capacity than your total wattage to ensure safe operation and future-proofing.
Types of Generators and Their Uses
- Portable Generators – Ideal for small power needs, such as running a few essential appliances.
- Inverter Generators – Provide cleaner power for sensitive electronics and are more fuel-efficient.
- Standby Generators – Automatically turn on during a power outage and can power an entire home or business.
Common Generator Sizes and What They Can Power
- 2,000-5,000 watts – Powers small appliances, lights, and a refrigerator.
- 5,000-7,500 watts – Supports multiple appliances, a sump pump, and a small HVAC system.
- 7,500-10,000 watts – Can run most household systems, including HVAC, water heaters, and large refrigerators.
- Whole-home generators (10,000+ watts) – Provide full backup power for your home, including HVAC, kitchen appliances, and well pumps.
Professional Generator Installation and Services
At J.A. Bertsch Heating, Cooling & Electrical, we help homeowners and businesses in Coeur d’Alene, Post Falls, Hayden, Rathdrum, Sandpoint, and Spirit Lake choose and install the right generator for their needs. Our expert electricians ensure proper installation, load testing, and ongoing maintenance for reliable backup power.
Need Help Choosing the Right Generator?
If you’re still wondering “What size generator do I need?”, our team can assess your power needs and recommend the best option. Contact J.A. Bertsch Heating, Cooling & Electrical today for professional generator installation, maintenance, and repair services.
FAQs
How do I calculate what size generator I need?
To determine the right generator size, make a list of essential appliances you need during a power outage. Check their wattage requirements (both running and starting wattage), then add up the total wattage. Choose a generator that provides at least 10-20% more power than your total to ensure safe and efficient operation. If you’re unsure, J.A. Bertsch Heating, Cooling & Electrical can assess your home’s power needs and recommend the best generator for you.
How big of a generator do I need for a 2,000-square-foot house?
A 2,000-square-foot home typically requires a whole-house generator between 20-22 kW to run essential systems like heating and cooling, kitchen appliances, lights, and sump pumps. However, the exact size depends on your home’s specific power demands. Our expert electricians can help you determine the best option for reliable backup power.
What size Generac generator do I need for a 1,500-square-foot house?
A 1,500-square-foot house usually needs a 16-20 kW Generac generator to power major appliances, HVAC systems, and essential home electronics. If you only need to run select appliances, a smaller unit may be sufficient. J.A. Bertsch Heating, Cooling & Electrical offers professional Generac generator installation and maintenance to ensure your home stays powered.
How many kW generator do I need to run a 2,000 sq ft house?
The required generator size for a 2,000 sq ft house depends on the number of appliances you plan to power. On average, a 20-24 kW generator is sufficient to keep everything running, including air conditioning, heating, refrigerators, and lights. If you only need to power a few essentials, a smaller unit may work. Contact our team for a professional power assessment.
What is the average cost of installing a whole-house generator?
The cost of installing a whole-house generator varies based on size, fuel type, and installation requirements. On average, a standby generator system costs between $5,000 and $15,000, including equipment, installation, and permits. At J.A. Bertsch Heating, Cooling & Electrical, we provide professional electrical services and financing options to make backup power accessible for homeowners in St Maries, Athol, Dalton Gardens, Worley, Plummer, and Harrison. Contact us today for a customized estimate!