Question 1

What specs are most important when comparing generators?

Accepted Answer

The most critical specs to compare are running watts (continuous power output), starting watts (surge capacity for motors), noise level in decibels, runtime at 25% and 50% load, fuel type and tank capacity, and THD (Total Harmonic Distortion). Running watts determine what appliances you can power simultaneously, while noise level and runtime heavily influence the user experience. For sensitive electronics, look for THD below 3%.

Question 2

Should I compare inverter vs conventional generators?

Accepted Answer

Yes — inverter and conventional generators serve different use cases. Inverter generators produce clean, stable electricity (low THD) that's safe for laptops, phones, and medical equipment. They're also significantly quieter and more fuel-efficient, but typically cost more per watt. Conventional (open-frame) generators deliver more raw power for the price and are better suited for job sites, high-draw tools, and scenarios where noise isn't a concern. Comparing the two types side-by-side helps clarify which trade-offs align with your needs.

Question 3

What wattage range is best for home backup?

Accepted Answer

For basic home backup covering a refrigerator, lights, phone chargers, and a few small appliances, 3,000 to 5,000 running watts is typically sufficient. If you need to run a window AC unit or sump pump, look for 5,000 to 7,500 watts. Whole-home backup with central air conditioning, an electric range, and a water heater usually requires 10,000 watts or more — often a standby generator rather than a portable model. Use our comparison tool to evaluate models across the wattage range that fits your scenario.

Question 4

How does noise level affect generator choice?

Accepted Answer

Noise level is measured in decibels (dBA) and varies dramatically between models. Inverter generators can be as quiet as 48 dBA (comparable to a normal conversation), while large open-frame models may exceed 75 dBA (louder than a vacuum cleaner). Many campgrounds, RV parks, and residential neighborhoods enforce noise limits — often around 60 dBA. If you plan to use your generator in noise-sensitive environments, compare models at the same load level since manufacturers sometimes report noise at different loads.

Question 5

Are manufacturer runtime estimates accurate?

Accepted Answer

Manufacturer runtime estimates are measured under controlled lab conditions, typically at 25% rated load, with a full tank. Real-world runtime can vary based on altitude, temperature, load fluctuation, fuel quality, and maintenance. As a rule of thumb, expect 10–20% less runtime than advertised at the same load. When comparing generators, focus on relative runtime differences rather than absolute hours — a model with 20% more rated runtime will generally outperform its competitor in practice, too.

Question 6

How do I choose the right fuel type for my generator?

Accepted Answer

Gasoline is the most common and readily available fuel, but it has a limited shelf life (3–6 months without stabilizer). Propane stores indefinitely, burns cleaner, and is widely available in pre-filled tanks, making it ideal for emergency preparedness. Dual-fuel generators (gas + propane) offer the best flexibility — use gas for maximum power and switch to propane for long-term storage or cleaner operation. Diesel models are more fuel-efficient and durable for heavy commercial use, but they're less common in the portable segment.

Question 7

What is THD and why does it matter?

Accepted Answer

THD (Total Harmonic Distortion) measures the purity of the electrical output. A lower THD percentage means cleaner power. Most sensitive electronics — laptops, smartphones, gaming consoles, CPAP machines — require THD below 5%, with below 3% being ideal. Inverter generators typically produce less than 3% THD, while conventional generators can range from 10% to over 25%. If you plan to power any electronic devices, comparing THD across models is essential to avoid potential damage.

Question 8

Can I compare more than two generators at once?

Accepted Answer

Yes. Our comparison tool supports up to four generators side-by-side. This is especially useful when you've narrowed your search to a shortlist and need to see all the specs, pricing, and trade-offs in one view. Charts, tables, and summary callouts automatically adjust to accommodate multiple models so you can quickly identify the best value.

Question 9

How are generators scored on RightGenerator?

Accepted Answer

Each generator receives a composite score (0–10) based on normalized specs across the entire catalog. The score factors in running watts, noise level, runtime, fuel efficiency, THD, weight, and available features relative to other models in the same category. Higher scores indicate better overall performance and value. You can see these scores in our comparison tool and on our rankings page for a quick at-a-glance assessment.

Question 10

What's the difference between the /compare page and individual comparison pages?

Accepted Answer

The /compare page is a flexible tool where you can pick any combination of generators to compare on the fly. Individual comparison pages (like 'Honda EU2200i vs Yamaha EF2000iSv2') are curated, in-depth analyses with AI-enhanced summaries, side-by-side visuals, winner picks, and detailed verdict write-ups. Both use the same underlying spec data, but curated comparison pages offer richer context for popular matchups.

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