Who makes Generac? Amazon sales, products and sellers
Updated November 2026 with September 2026 data
At a glance
- Size
- Large
- $4.4M est./mo
- Trend
- Declining
- -13%, last 2 vs prior 2 months
- Ratings
- Strong
- 4.6 ★ · 15,065 reviews
- Who sells it
- 14 sellers
- Top seller has 55% of units
Generac estimated monthly revenue on Amazon
Our read on Generac
In September 2026, Generac ranked 6 of 207 brands in the Generators category within Patio, Lawn & Garden, with an estimated 4% share of category revenue. Estimated monthly revenue was $4.4M on 12,000 units, down 15% from $5.1M in June 2026. The trend is labeled Declining, at -13% over 2 months. The brand has 109 products selling across 14 sellers, and Amazon accounts for 55% of units. The best-selling listings are maintenance kits for standby generators, each rated 4.8 and selling 1,300 to 1,400 units per month. The average rating is 4.6 across 15,065 reviews. This view covers 4 months of data.
Top Generac products on Amazon
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| Product | Rating | Est. units/mo | Amazon link |
|---|---|---|---|
| Generac 5W-20 Maintenance Kit for 20Kw-26Kw 999cc Generators | 4.8 ★483 reviews | 1,400 | Check price on Amazon |
| Generac 6485 Scheduled Maintenance Kit for 20kW and 22kW Standby | 4.8 ★2,560 reviews | 1,400 | Check price on Amazon |
| Generac 0J93230SSM 20Kw-22Kw SM 999 Maintenance Kit | 4.8 ★1,099 reviews | 1,300 | Check price on Amazon |
| Generac 6484 Maintenance Kit for 12-18 kW Generators | 4.7 ★1,505 reviews | 880 | Check price on Amazon |
| Generac 5W-20 Full Synthetic Oil Change Bundle with Oil | 4.7 ★268 reviews | 830 | Check price on Amazon |
| Generac A0001412874 5W20 Full Synthetic Engine Oil Quart | 4.8 ★185 reviews | 550 | Check price on Amazon |
| Generac 7,000 50 Amp Load Manager, Gray | 4.6 ★458 reviews | 540 | Check price on Amazon |
| Generac 5W-30 Full Synthetic Oil Change Kit 2 Quarts oil and Filter | 4.7 ★716 reviews | 510 | Check price on Amazon |
| Generac 12,500 Starting Watt Tri-Fuel Portable Generator | 4.4 ★60 reviews | 490 | Check price on Amazon |
| Generac 3,300 Watt Gas Powered Portable Inverter Generator | 4.3 ★179 reviews | 360 | Check price on Amazon |
Who sells Generac
- Amazon55%
- generator parts12%
- BEYOND YOUR HOME12%
- BrandNewEngines, Inc11%
- E Stribute9%
Share of estimated units sold in September 2026, by the seller holding the Buy Box.
Place in its category
#6 of 207
Rank 6 of 207 brands in Generators by estimated revenue in September 2026, with 4% of the category.
Frequently asked questions
Who makes Generac?
Generac is the brand name on 109 products we tracked on Amazon in September 2026 mostly in Generators (Patio, Lawn & Garden). The largest seller of Generac products that month was Amazon, with 55% of estimated units. Amazon listings don't show the brand owner's legal name, so the brand's own website is the place to confirm its parent company.
How much does Generac sell on Amazon?
Generac sold an estimated $4.4M on Amazon in September 2026, about 12,000 units. That is -15% compared with June 2026. These are Ecominsights estimates, not figures reported by the brand.
What are Generac's best-selling products on Amazon?
By estimated units sold in September 2026: 1. Generac 5W-20 Maintenance Kit for 20Kw-26Kw 999cc Generators (about 1,400 units); 2. Generac 6485 Scheduled Maintenance Kit for 20kW and 22kW Standby (about 1,400 units); 3. Generac 0J93230SSM 20Kw-22Kw SM 999 Maintenance Kit (about 1,300 units).