Generac Q3 2026: record $1.29B sales, up 16%, as data-center backlog nearly triples to $4.5B

Generac, the company best known for home standby generators, reported record third-quarter 2026 net sales of $1.29 billion, up 16.2% from $1.11 billion a year earlier. Diluted earnings per share (EPS, profit divided by the number of shares) rose 63% to $1.83 from $1.12. Two engines ran at once this quarter. Generators for data centers lifted the Commercial & Industrial (C&I) segment 28%, and after a weak first half the Residential segment grew 9% on stronger home standby and portable generator sales. The data-center backlog (orders signed but not yet delivered) is now about $4.5 billion, up from about $1.6 billion in July, mostly because of the Amazon agreement announced in September.

This analysis is based on the earnings release filed with the SEC on October 28, 2026 (Form 8-K, Exhibit 99.1). The full 10-Q for the quarter ended September 30, 2026 has not been filed yet, so the detailed management discussion, including any tariff-refund effect on margins, is not yet available.

Key metrics

Gross margin is the share of sales left after the direct cost of making the products. Adjusted EBITDA is the company's own measure of earnings before interest, tax, depreciation and amortization, with some items it considers one-off also removed. Free cash flow is operating cash flow minus spending on property and equipment.

For the first nine months of 2026, net sales rose 13.2% to $3,527.7 million and diluted EPS rose to $5.48 from $3.10.

Where the growth came from

Commercial & Industrial: total segment sales +28% to $553.0M. About 4 points of that came from acquisitions (Enercon, Wolter and others bought earlier in the year), net of divestitures and currency, which puts core growth at roughly 24%. The release credits "ramping revenue from products sold into the global data center market." International sales grew across regions, but that was offset by lower shipments to domestic industrial distributors and telecom customers. Segment adjusted EBITDA rose 58% to $69.3 million, and the margin improved to 12.5% from 10.1%, which the company attributes to operating leverage and the acquisitions. Operating leverage means fixed costs spread over more units.

Residential: total segment sales +9% to $744.1M. The release says home standby and portable generators showed "strong sales growth," partly offset by lower shipments of energy storage systems (home batteries). Management links the demand to "mega-trends around lower power quality," meaning more frequent and longer outages. Segment adjusted EBITDA rose 25% to $200.8 million, and the margin was 27.0% versus 23.4%. The company cites favorable price/cost, higher volumes and lower spending on its energy-technology products.

The data-center backlog

• In July Generac put its data-center product backlog at about $1.6 billion. It now says about $4.5 billion.
• Most of the increase is the September agreement with Amazon. Initial deliveries are expected to total $2.4 billion across 2027 and 2028. CEO Aaron Jagdfeld also cites "other wins from both new and existing customers."
• Backlog is a management figure, not an audited one. Among its own risk factors, the release lists data-center contract terms that include "cancellation rights, delivery requirements, and potential liability exposure." So the backlog is a strong signal, but not guaranteed revenue.
• Generac is spending to deliver it. Capital expenditures (spending on plants and equipment) were $39.3 million in the quarter, up from $21.9 million, and $211.7 million went to acquisitions in the first nine months.

Takeaway: This was the first quarter in which both halves of Generac grew together. Data-center generators drove C&I up 28%, and the home generator business returned to 9% growth after a flat first half. Unlike Q2, the profit jump is not mainly a one-off: operating income rose 56% on 16% sales growth, and reported EPS growth would have been higher still without a much higher tax rate. The open question has moved from demand to delivery. Generac now has to build roughly $4.5 billion of data-center equipment at margins that, at 12.5% in C&I, are less than half of Residential's 27%.

What the headline numbers hide

• The tax rate held EPS growth back. Pretax income rose 82.7% to $143.1 million, but net income rose only 65%. The effective tax rate (the share of pretax profit paid as tax) was 23.9%, up from 15.0%, because the prior-year quarter had "favorable discrete tax items" that did not repeat. At this year's tax rate, last year's EPS would have been about $1.00 (our arithmetic), so like-for-like EPS growth was closer to 83% than the reported 63%.
• GAAP profit absorbs some charges both years, of similar size. GAAP is the standard accounting basis; the adjusted figures exclude certain items. This quarter, legal, regulatory and other provisions were $20.2 million, including a new $14.3 million "clean energy warranty related matters" charge. A year ago they were $23.2 million, mostly $17.8 million of class-action costs. Because the amounts are similar, they barely distort the year-over-year comparison. The adjusted figures exclude the warranty item, though, and warranty costs are usually an ordinary operating expense. If clean-energy warranty charges come back next quarter, adjusted EPS will be overstating earnings.
• Adjusted EPS grew more slowly than GAAP EPS (+39% vs +63%). The company's adjusted EPS of $2.54 also excludes $28.6 million of intangible amortization (an accounting charge for the value of acquired businesses), up from $24.9 million as acquisitions add more. It also excludes a $3.0 million loss on the Wallbox stake. The prior year's adjusted number benefited from the same low tax rate that flattered GAAP, so the smaller adjusted growth rate partly reflects the tax effect described above.
• Where the margin came from. Gross margin rose 1.6 points to 39.9%. The release credits "favorable price/cost impacts... including lower tariff costs," partly offset by an "unfavorable sales mix," meaning more lower-margin C&I equipment. In Q2, Generac booked a $71.1 million tariff refund and said part of the recovery reduced the value of inventory on its balance sheet, so it would reach profit as those goods were sold. The release does not say how much of the Q3 "lower tariff costs" is that kind of one-time pass-through and how much is a lasting lower tariff bill. The 10-Q should answer this.
• Cash conversion is good. Operating cash flow of $171.0 million was 1.57 times net income in the quarter. For nine months it was $411.5 million against $325.1 million of net income.
• Receivables are growing much faster than sales. Accounts receivable (money customers owe) reached $846.0 million, up 40% from $602.7 million at December 31. Over nine months the increase used $241.7 million of cash, compared with $32.0 million a year earlier, while nine-month sales grew 13%. Inventory rose only 3.5% since year-end. The release gives no reason. Larger, slower-paying data-center customers would be one explanation, but that is our hypothesis, not the company's. This is the figure to check in the 10-Q.
• No help from buybacks. Generac repurchased no shares in the first nine months, compared with $147.9 million a year earlier, and it pays no dividend. Diluted shares rose 0.7%, so share count reduction contributed nothing to EPS growth.

On balance the quarter's reported earnings are understated: operations drove the growth, and the jump in the tax rate to 23.9% from 15.0% took about 20 points off reported EPS growth. The unquantified tariff benefit and the excluded warranty charge are the two caveats.

Did last quarter's read hold up?

After Q2 we flagged three things:

• "Residential needs a strong second half." It got one. Residential external sales rose 8.9%, after falling about 1% in the first half.
• "The margin raise is mostly the refund." Partly confirmed. Q3 gross margin of 39.9% is well below Q2's refund-inflated 44.5%, but above the roughly 38.4% Q2 would have shown without the refund. Q3 may still contain some tariff benefit; see above.
• "C&I margins are the thing to watch." They held. The 12.5% C&I adjusted EBITDA margin is in line with Q2's roughly 12.6% once about 2 points of tariff refund are removed from its 14.6%, and it is up from 10.1% a year ago.

Outlook

Management's full-year 2026 guidance, updated October 28:

• Net sales growth in the mid-to-high teens percent, unchanged. That includes about 2 points from currency and acquisitions net of divestitures.
• Net income margin of 9.0–10.0%, unchanged.
• Adjusted EBITDA margin of 20.5–21.0%, raised at the bottom from 20.0–21.0%.

Our read:

• Q4 has to be the strongest quarter of the year. Nine-month sales growth is 13.2%. For the full year to reach the mid-to-high teens, fourth-quarter growth must run above that. The data-center ramp and the easy Residential comparison (the company described very low outage activity in late 2025) make that plausible. Home standby demand still depends on storms and outages that nobody can forecast.
• The margin guidance is close to where the year already is. Nine-month adjusted EBITDA margin is 21.0% (our arithmetic: $740.4M on $3,527.7M of sales), at the top of the new range. Nine-month net income margin is 9.2%, inside the 9.0–10.0% range. So the guidance leaves room for a lower-margin Q4, for example if C&I's lower margins make up a larger share of sales.
• What to watch in the 10-Q: the receivables build, how much of the gross margin gain came from tariff refunds passing through inventory, and the details of the clean-energy warranty charge.