Best Generac Generator (2026): 11 Picks by Stated Details
For a Generac generator, the top pick is the 12,500 Starting Watt Tri-Fuel Portable Generator, because it is the only listing here that states a tri fuel setup, an electric start, a CO sensor, and a watts figure over 9,000 W. This guide compares 11 Generac listings on the details each title states and on live prices, ranked by how many details are stated and by fuel type.
11 picks from 18 generators that match this guide with a price we can quote today, made by 14 makers. Every price below is live and carries the moment it was read.
The picks at a glance
Which one should you buy?
- For a home on a propane tank: The 12,500 Starting Watt Tri-Fuel Portable Generator states it runs on gas, propane, or natural gas, so it fits a home with a propane tank. See pick 1
- For weekend camping trips: The 3,300 Watt Gas Powered Portable Inverter Generator states an inverter type and an RV ready outlet, which suits a camper or trailer. See pick 4
- For a house on a street with frequent outages: The 28kW Whole Home Generator states a standby type and a watts figure over 9,000 W, which fits a home that needs automatic backup. See pick 5
- For a job site or a workshop: The 8,125 Starting Watt Portable Gas Generator states an electric start and a watts figure in the 5,001 to 9,000 W group, which works for tools. See pick 3
The 11 picks
1 Most stated details, tri fuel
Generac 12,500 Starting Watt Tri-Fuel Portable Generator
- Type
- Portable
- Fuel
- Tri Fuel
- Watts
- Over 9000 W
- Electric start
- Yes
- CO sensor
- Yes
$1,169.00 (as of 10/18/2026 23:14 PDT - Details)
This listing states the most details: type, fuel, watts group, electric start, and a CO sensor. It is the only tri fuel portable here, so it ranks first.
Pros
- States tri fuel: gas, propane, or natural gas
- States electric start
- States a CO sensor
- Watts figure over 9,000 W
Cons
- Does not state an RV ready outlet
- Fuel type is not stated as dual fuel or gasoline only
Good fit if
- For a home with a propane tank
- For buyers who want a portable with multiple fuel options
Skip if
- If you need an RV ready outlet
- If you prefer a standby unit for automatic backup
Verdict: The most complete Generac listing in this guide, with tri fuel and a CO sensor stated.
2 Tri fuel with RV ready
Generac 12,500 Watt Tri Fuel Generator with EFI and Electric Start | Gas
- Fuel
- Tri Fuel
- Watts
- Over 9000 W
- Electric start
- Yes
- RV ready
- Yes
$1,399.00 (as of 10/18/2026 23:14 PDT - Details)
This listing states tri fuel and an RV ready outlet, plus electric start and a watts figure over 9,000 W. It has fewer details than the top pick because it does not state a CO sensor.
Pros
- States tri fuel: gas, propane, or natural gas
- States RV ready
- States electric start
- Watts figure over 9,000 W
Cons
- Does not state a CO sensor
- Type is not stated in the title
Good fit if
- For an RV with a 30 or 50 amp plug
- For buyers who want tri fuel and an RV outlet
Skip if
- If you need a CO sensor stated
- If you want a portable type explicitly named
Verdict: A tri fuel generator with RV ready and electric start, but no CO sensor stated.
3 Portable with electric start
Generac 8,125 Starting Watt Portable Gas Generator
- Type
- Portable
- Fuel
- Gasoline
- Watts
- 5001 to 9000 W
- Electric start
- Yes
$899.00 (as of 10/18/2026 23:14 PDT - Details)
This listing states a portable type, gasoline fuel, a watts figure in the 5,001 to 9,000 W group, and electric start. It has 4 details, ranking after the tri fuel picks.
Pros
- States portable type
- States electric start
- States gasoline fuel
- Watts figure in the 5,001 to 9,000 W group
Cons
- Does not state an RV ready outlet
- Does not state a CO sensor
Good fit if
- For a job site or workshop
- For buyers who want a portable with electric start
Skip if
- If you need an RV ready outlet
- If you prefer a tri fuel model
Verdict: A straightforward portable with electric start and a mid-range watts figure.
4 Inverter with RV ready
Generac 3,300 Watt Gas Powered Portable Inverter Generator
- Type
- Inverter
- Fuel
- Gasoline
- Watts
- 3000 to 5000 W
- RV ready
- Yes
$849.00 (as of 10/18/2026 23:14 PDT - Details)
This listing states an inverter type, gasoline fuel, a watts figure in the 3,000 to 5,000 W group, and an RV ready outlet. It has 4 details, but ranks below the portable because it has fewer watts.
Pros
- States inverter type
- States RV ready
- States gasoline fuel
- Watts figure in the 3,000 to 5,000 W group
Cons
- Does not state electric start
- Does not state a CO sensor
Good fit if
- For camping or RV trips
- For buyers who want a lighter inverter type
Skip if
- If you need electric start
- If you need more than 5,000 W
Verdict: The only inverter in this list, with RV ready and a moderate watts figure.
5 Largest standby watts figure
Generac 28kW Whole Home Generator
- Type
- Standby
- Watts
- Over 9000 W
$8,387.10 (as of 10/18/2026 23:14 PDT - Details)
This standby listing states a watts figure over 9,000 W and a standby type, but no fuel, electric start, RV ready, or CO sensor. It ranks after the portable and inverter picks due to fewer details.
Pros
- States standby type
- Watts figure over 9,000 W
- Title mentions transfer switch and cellular capability
Cons
- Fuel type not stated
- Electric start not stated
- RV ready not stated
Good fit if
- For a whole home backup
- For buyers who want a standby unit with a transfer switch
Skip if
- If you need a stated fuel type
- If you want a portable unit
Verdict: A high-wattage standby with a transfer switch, but missing fuel and start details.
6 Standby with transfer switch
Generac 26kW Whole Home Generator
- Type
- Standby
- Watts
- Over 9000 W
$7,253.10 (as of 10/18/2026 23:14 PDT - Details)
This standby listing states a watts figure over 9,000 W and a standby type, but no fuel or other details. It ranks below the 28kW because it has a lower watts figure in the title.
Pros
- States standby type
- Watts figure over 9,000 W
- Title mentions transfer switch and cellular capability
Cons
- Fuel type not stated
- Electric start not stated
- RV ready not stated
Good fit if
- For a whole home backup
- For buyers who want a transfer switch included
Skip if
- If you need a stated fuel type
- If you prefer a portable unit
Verdict: A standby with a transfer switch, but with fewer stated details than the top picks.
7 Standby with 200 amp transfer
Generac 24kW Whole Home Generator
- Type
- Standby
- Watts
- Over 9000 W
$6,875.10 (as of 10/18/2026 23:14 PDT - Details)
This standby listing states a watts figure over 9,000 W and a standby type, with a 200 amp transfer switch mentioned. It ranks after the 26kW due to a lower watts figure.
Pros
- States standby type
- Watts figure over 9,000 W
- Title mentions 200 amp transfer switch
Cons
- Fuel type not stated
- Electric start not stated
- RV ready not stated
Good fit if
- For a whole home backup
- For buyers who want a 200 amp transfer switch
Skip if
- If you need a stated fuel type
- If you want a portable unit
Verdict: A standby with a 200 amp transfer switch, but missing fuel and start details.
8 Dual fuel standby
Generac 26kW Whole Home Generator
- Type
- Standby
- Fuel
- Dual Fuel
- Watts
- Over 9000 W
$6,317.10 (as of 10/18/2026 23:14 PDT - Details)
This standby listing states dual fuel, a watts figure over 9,000 W, and a standby type. It has 3 details, ranking above the 24kW because dual fuel is stated.
Pros
- States dual fuel
- States standby type
- Watts figure over 9,000 W
Cons
- Electric start not stated
- RV ready not stated
- CO sensor not stated
Good fit if
- For a home with a natural gas line
- For buyers who want dual fuel in a standby
Skip if
- If you need electric start stated
- If you want a transfer switch included
Verdict: A dual fuel standby with a high watts figure, but no start or outlet details.
9 Standby with transfer switch
Generac 18kW Whole Home Generator
- Type
- Standby
- Watts
- Over 9000 W
$5,975.10 (as of 10/18/2026 23:14 PDT - Details)
This standby listing states a watts figure over 9,000 W and a standby type, with a transfer switch mentioned. It ranks after the 24kW due to a lower watts figure.
Pros
- States standby type
- Watts figure over 9,000 W
- Title mentions transfer switch
Cons
- Fuel type not stated
- Electric start not stated
- RV ready not stated
Good fit if
- For a whole home backup
- For buyers who want a transfer switch
Skip if
- If you need a stated fuel type
- If you want a portable unit
Verdict: A standby with a transfer switch, but with fewer stated details than the top picks.
10 Standby with 200 amp transfer
Generac 22kW Whole Home Generator
- Type
- Standby
- Watts
- Over 9000 W
$6,506.10 (as of 10/18/2026 23:14 PDT - Details)
This standby listing states a watts figure over 9,000 W and a standby type, with a 200 amp transfer switch. It ranks after the 18kW due to a higher watts figure but same details.
Pros
- States standby type
- Watts figure over 9,000 W
- Title mentions 200 amp transfer switch
Cons
- Fuel type not stated
- Electric start not stated
- RV ready not stated
Good fit if
- For a whole home backup
- For buyers who want a 200 amp transfer switch
Skip if
- If you need a stated fuel type
- If you want a portable unit
Verdict: A standby with a 200 amp transfer switch, but missing fuel and start details.
11 Smallest standby watts figure
Generac 10kW Whole Home Generator
- Type
- Standby
- Watts
- Over 9000 W
$3,329.10 (as of 10/18/2026 23:14 PDT - Details)
This standby listing states a watts figure over 9,000 W and a standby type, but no fuel or other details. It ranks last among the standby units due to the lowest watts figure in the title.
Pros
- States standby type
- Watts figure over 9,000 W
- Title mentions cellular capability
Cons
- Fuel type not stated
- Electric start not stated
- RV ready not stated
Good fit if
- For a smaller home backup
- For buyers who want a standby with cellular monitoring
Skip if
- If you need a stated fuel type
- If you want a transfer switch included
Verdict: A standby with a lower watts figure, but still over 9,000 W, and no fuel details.
Side by side
| # | Generator | Type | Fuel | Watts | Electric start | RV ready | CO sensor |
|---|---|---|---|---|---|---|---|
| 1 | Generac 12,500 Starting Watt Tri-Fuel Portable Generator | Portable | Tri Fuel | Over 9000 W | Yes | not stated | Yes |
| 2 | Generac 12,500 Watt Tri Fuel Generator with EFI and Electric Start | Gas | not stated | Tri Fuel | Over 9000 W | Yes | Yes | not stated |
| 3 | Generac 8,125 Starting Watt Portable Gas Generator | Portable | Gasoline | 5001 to 9000 W | Yes | not stated | not stated |
| 4 | Generac 3,300 Watt Gas Powered Portable Inverter Generator | Inverter | Gasoline | 3000 to 5000 W | not stated | Yes | not stated |
| 5 | Generac 28kW Whole Home Generator | Standby | not stated | Over 9000 W | not stated | not stated | not stated |
| 6 | Generac 26kW Whole Home Generator | Standby | not stated | Over 9000 W | not stated | not stated | not stated |
| 7 | Generac 24kW Whole Home Generator | Standby | not stated | Over 9000 W | not stated | not stated | not stated |
| 8 | Generac 26kW Whole Home Generator | Standby | Dual Fuel | Over 9000 W | not stated | not stated | not stated |
| 9 | Generac 18kW Whole Home Generator | Standby | not stated | Over 9000 W | not stated | not stated | not stated |
| 10 | Generac 22kW Whole Home Generator | Standby | not stated | Over 9000 W | not stated | not stated | not stated |
| 11 | Generac 10kW Whole Home Generator | Standby | not stated | Over 9000 W | not stated | not stated | not stated |
How we picked
This guide compares 11 Generac generator listings from the pool, which includes portable, inverter, and standby units. The ordering rule is: first by the number of stated details (type, fuel, watts group, electric start, RV ready, CO sensor; most first), then tri fuel before dual fuel before gasoline before not stated, then by the order in the pool file. The generators are compared on the details stated in each listing title and on live prices, not on any measured performance. The top pick is the one with the most stated details and a tri fuel label. The list includes 1 inverter, 1 portable, and 9 standby units, with no more than 3 picks from any one brand, as all are Generac.
How to choose
Inverter, open frame or standby
The title states the type. In this list, 1 listing says inverter, 1 says portable, and the rest say standby. Inverter and portable units are moved and set up by the user; standby units are installed by a professional. The type is a stated detail, not a promise of performance.
Which fuels the title names
The fuel is read from the title. Here, 2 listings say tri fuel (gas, propane, or natural gas), 1 says dual fuel, and 2 say gasoline. The rest do not state a fuel. For what each fuel is, see the EIA pages in the sources. The title does not always name the fuel, so check the maker's page.
Starting watts and running watts in a title
The first watts figure in the title is often the starting (peak) figure, and the running figure is lower. The title may print both, as in the 8,125 Starting Watt Portable, which also lists 6,500 running watts. The maker's page shows the running figure. Never assume the first figure is what the generator produces continuously.
Electric start, RV outlets and CO sensors as listing words
These are stated details. Electric start means the title says it; RV ready means a 30 or 50 amp RV outlet is named; a CO sensor means the title names a carbon monoxide sensor or shutoff. If a title does not state one, it is not stated by the seller. Check the maker's page for the full list.
Who connects a generator to a house
Connecting a generator to a home's electrical system is for a licensed electrician, the maker, and the local permit office. This guide does not describe wiring or transfer switches. Standby units are installed by professionals.
What this guide leaves out (and why)
This guide does not cover noise, runtime, fuel use, or where to run a generator. The catalogue has no data for those. Read the maker's manual and the CPSC, CDC, and NFPA pages in the sources for that information.
Questions
What is the best Generac generator in this guide?
The top pick is the 12,500 Starting Watt Tri-Fuel Portable Generator because it states the most details: tri fuel, electric start, a CO sensor, and a watts figure over 9,000 W. It ranks first by the ordering rule of most stated details, then tri fuel.
Does this guide cover noise, runtime, fuel use, or where to run a generator?
No. The catalogue has no data for noise, runtime, fuel use, or safe placement. The maker's manual and the CPSC, CDC, and NFPA pages in the sources are where to read about those topics. This guide only compares stated details and live prices.
What does 'tri fuel' mean in a title?
Tri fuel means the title states the generator runs on gasoline, propane, and natural gas. In this list, 2 listings say tri fuel. The EIA pages in the sources explain what each fuel is. The title does not always state the fuel, so check the maker's page.
Why is the first watts figure not the running watts?
The first watts figure in a title is often the starting (peak) figure, which is higher than the running figure. The title may print both, as in the 8,125 Starting Watt Portable, which also lists 6,500 running watts. The maker's page shows the running figure.
Can you connect a Generac generator to a house myself?
No. Connecting a generator to a home's electrical system is for a licensed electrician, the maker, and the local permit office. This guide does not describe wiring or transfer switches. Standby units are installed by professionals.
Recent updates
- : First published.