
- Electric start
- 30-horsepower V-twin OHV engine
- Meets EPA, CARB standards
- Low-oil shutdown
- Wheels make it portable
- Uses a lot of gasoline
- Can be tricky to tweak for smooth power
- No hour meter

Generac 4582-2 Ultra Source 15,000 Watt Portable Generator (CARB Compliant) |
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In Stock. Eligible for FREE Super Saver Shipping |
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Our Sources
1. Electric Generators Direct.com
Over a dozen owners give the Generac Guardian 4582 portable generator rave reviews at this retailer site. The professional staff here recommends the Guardian 4582 generator as the best extra-large portable generator for emergency use, based on its build quality, features and value for the money.
Review: Guardian UltraSource 15,000 Watt Electric Start Generator, Editors of and contributors to ElectricGeneratorsDirect.com
2. Amazon.com
More than 10 owners give the Generac Guardian 4582 generator mixed reviews. Some owners are very satisfied but others complain about noise, lack of 240/120v outlet and difficulty tuning the engine to provide smooth power.
Review: Generac 4582-2 Ultra Source 15,000 Watt Portable Generator, Contributors to Amazon.com
3. Epinions.com
Only one review of the Guardian 4582 generator appears here, but it's especially detailed about how well the generator performs during a long household power outage, running the air conditioner in addition to major appliances.
Review: Guardian 15,000 Watt Ultra Source 4582 Generator Review, Contributors to Epinions.com
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Generac 5734 GP Series GP15000 22,500 Watt 992cc OHV Portable Gas Powered Generator With Electric Start (Non-CARB Compliant)
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