What size generator is most commonly installed to power the essential circuits of a 1,500 square foot house? | | 5-10 kW | 13% | | 10-15 kW | 31% | | 15-20 kW | 31% | | 20-25 kW | 13% | | Not sure | 9% | | | | | Question: What size generator is most commonly installed to power the essential circuits of a 1,500 square foot house? Top Answer (31% of 22 votes): 15-20 kW.
Answer: 10-15 kW
Explanation: For a typical 1,500 sq ft home, the most commonly installed generator size for essential circuits is 10–15 kW. This range reliably covers the basics without oversizing the system.
Why 10–15 kW is the standard choice
Essential loads (fridge, lights, outlets, furnace blower, garage door, internet, a few circuits) fall comfortably within this range.
Most 1,500 sq ft homes have moderate electrical demand and don’t require whole-house capacity.
Startup loads for items like refrigerators and furnaces are manageable for a 10–15 kW unit.
Cost-effective — it avoids the unnecessary expense of a 20 kW+ whole-house generator.
Larger sizes (15–20 kW or more) are typically chosen only when the homeowner wants to run central AC, multiple large appliances, or near-whole-house coverage. | | EcoWise Electric LLC | Answer: 20-25 kW
Explanation: For our installations and by our calculations, a very common size is 20-26kw. | | G & H Electrical Services, LLC | Answer: 5-10 kW
Explanation: Varies depending on the load 6kw to 8.5 kw will run most essential appliances. | | RAC Electrical Services` | | | ProMatcher | Answer: 15-20 kW
Explanation: For a whole house generator I would install at least 15 KW with load sheding equipment | | Roche Electric & Consulting | Answer: 10-15 kW
Explanation: In a typical 1500 square-foot home the common size of a generator is between 12 and 15 KW if a Central air condition system is Inc. If a home is equipped with window air-conditioning units a small generator can be used these are variable factors and are based on a one-on-one consultation. | | Power Now Solutions , Inc. | Answer: 15-20 kW
Explanation: Cores all emergency circuits | | EMP industries | | | ProMatcher | Answer: 15-20 kW
Explanation: Sometimes smaller if most of the house is powered by gas, like the oven, hot water, furnace, etc. | | DiBiagio Electrical Construction llc | Answer: Not sure
Explanation: cannot go by sq feet need to know exact load being used | | GREEN ELECTRIC | Answer: 20-25 kW
Explanation: There are many things to consider when calculating the size of generator. For example is you house all electric, do you have furnace, how many AC do you have and how many tons are they. These are all question that you need to get accurate sizing. | | Dependable Generators | | | ProMatcher |
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