Tom Okray
Executive Vice President and Chief Financial Officer at Eaton
Thanks, Craig. On Page 13, I'll start by providing a summary of our strong Q1 result. For the third consecutive quarter, we generated organic growth of 15%. Revenue was up 13%, with the organic growth reduced by 2 percentage points of unfavorable foreign-exchange. Operating profit, a first quarter record grew 19% and margins expanded 90 basis-points to 19.7% also a Q1 record. Adjusted EPS increased by 16% over the prior year to $1.88, all-in the strong organic growth and margins enabled us to report our first quarter record adjusted EPS.
Our higher growth not only demonstrates the megatrends, but also the importance of prioritizing our customers by carrying higher levels of inventory when supply chains were challenged. Lastly, our free cash flow of $209 million was nearly $300 million above prior year and exceeded our expectation. You will recall from our Q4 call, we expected free cash flow to be relatively flat year-over-year.
Moving on to the next chart, our Electrical Americas business had another very strong quarter. We have set Q1 record for sales, operating profit and margin. Organic sales growth was 22%. Electrical Americas has generated double digit organic growth for five consecutive quarters, including back-to-back quarters of at least 20% growth. On a two-year stack, organic growth is up 32%.
In the quarter, there was broad based growth in all end-market with especially robust growth in commercial and institutional utility and datacenter market. Specifically, we posted 25% organic growth in our datacenter revenues in Q1. So we continue to see very strong growth in this important market. Utility and commercial and institutional were up more than 30%. It's also worth noting that we posted strong revenue growth of 17% in our Residential business. The two-year stack is over 40% growth. We're seeing strength in multifamily homes, completion of single-family homes and process and increased electrical content per home, which are more than offsetting weakness in new single-family start.
Operating margin of 22.9% was up 380 basis-points versus prior year, benefiting from higher volumes. Incremental margins were very strong at more than 40%. We continue to manage price effectively to more than offset inflationary pressure. Orders and backlog show continued strength. On a rolling 12 month basis, orders were up 18%, which remains at a high-level, with particular strength in datacenter, distributed IT, utility and industrial market.
On a quarter-over-quarter sequential basis, orders grew 19%. We're also continuing to build backlog. Backlog was up 51% versus prior year and up 9% sequentially. In addition to the robust trends in orders and backlog, our major project negotiations pipeline in Q1 was up more than 20% versus prior year and nearly 20% sequentially from especially strong growth in datacenter, water wastewater and transportation market. Overall, Electrical Americas had a very strong quarter to start the year.
On page 15, you'll find the results of our Electrical Global segment, which posted all-time record sales of $1.5 billion. Organic growth was up 8%, which was partially offset by headwinds from foreign-exchange and a divestiture. Organic growth was driven by strength in utility, datacenter and distributed IT market. Our datacenter revenues for Electrical Global increased 32% in the quarter. Utility was up 25% and distributed IT up 20%. Operating margin of 18.3% was down compared to prior year, primarily from manufacturing inefficiencies and investment in growth, partially offset by higher sales volume and inflationary price recovery. Orders were up 4% on a rolling 12 month basis, with strength in datacenter, commercial and institutional and utility market. Sequentially, orders grew 12%. Backlog increased 3% year-over-year and 6% sequentially.
I'm also pleased to highlight that last month, we closed the acquisition of a 49% stake in Jiangsu Ryan Electric Co. This is a Chinese based business with approximately $100 million of revenues, which manufactures power distribution and sub-transmission transformers and will accelerate Eaton's growth in renewable energy, datacenter, utility and industrial market. This is Eaton's fourth JV in China in the last two years, allowing us to expand our market presence, serving high-growth markets inside and outside of China.
Before moving to our Industrial businesses, I'd like to briefly recap the combined Electrical segment. For Q1, we posted organic growth of 16%, incremental margin of 34% and operating margin of 21%, which was a 180 basis points of year-over-year margin improvement. Orders grew 13% on a rolling 12 month basis, with sequential growth in the quarter of nearly 20%, compared roughly compared to roughly flat sequential order growth in the six years prior to the pandemic. Backlog grew 39% in the quarter and 8% sequentially. On a rolling 12 month basis, our book-to-bill for our Electrical sector remains very strong at above 1.2, it was also above 1.2 for Q1. We remain confident in our positioning for continued growth with strong margins in our overall Electrical business.
The next page recaps our Aerospace segment. We posted Q1 record for sales and operating profit. Organic growth was 13% with a 1 percentage point headwind from foreign exchange. Growth was primarily driven by strength in commercial aftermarket, up more than 30% and commercial OEM, up more than 25%. Operating margin was 22.5%, which was 40 basis-points over last year, driven by volume growth and inflationary price recovery.
Order growth and backlog trends also remain encouraging. On a rolling 12-month basis, orders were up 21% organically with strength across all end-market, including continued outgrowth in defense OEM order. Similar to the second half of the year, we continue to see second half of last year, we continue to see strong growth in our defense orders in the quarter with OEM up 55% and aftermarket up more than 40%.
On a rolling 12 month basis, our book-to-bill for our Aerospace segment remains very strong at more than 1.2, including more than 1.25 for Q1. Year-over-year backlog growth increased 27% in Q1, an acceleration from up 21% in Q4.
Moving onto our Vehicle segment on Page 17. In Q1, revenue was up 10%, with 11% organic growth and 1 percentage point of unfavorable FX. We saw particular strong growth in both the Americas and our EMEA market. Operating margins came in at 14.5% with the unfavorability to prior year, primarily due to manufacturing inefficiencies, partially offset by higher sales volume and price cost. We continue to make progress towards securing more sustainable technology wins, which most recently includes multiple new programs for our ePowertrain solution.
On page 18, we show results for our eMobility business. We generated strong growth in the quarter, revenue was up 17%, including 18% from organic growth. Margin was down 30 basis-points versus prior year, driven by higher manufacturing start-up costs associated with new electric vehicle program. We remain very encouraged by the growth prospects of the eMobility segment. We continue to leverage our capabilities across our entire portfolio, including core technology in both Electrical and Industrial businesses.
Since 2018, we have won $1.4 billion of mature year revenues in this business, with many of these programs ramping-up in 2023 and 2024. This strong momentum includes additional recent wins with Breaktor including our next-generation battery platforms, with a large European OEM.
Next on page 19, we show historical backlog chart for the Electrical sector and Aerospace segment. We think it's important to illustrate how backlog has grown over-time. Our record backlog was roughly $12 billion to end Q1. This is up nearly three times, the ending 2019 level. These metrics provide us with great confidence in the outlook for the full-year and going-forward.
On the next page, we show our fiscal year organic growth and operating margin guidance. We are raising our organic growth guidance for 2023. We continue to have robust negotiations pipeline and build backlog with particular strength in Electrical Americas and Aerospace. We now expect organic growth in Electrical Americas of 11% to 13%, up 300 basis-points from our prior 8% to 10% guide. We're also raising Electrical Global 200 basis-points to 6% to 8% from 4% to 6%. And we are increasing Aerospace 200 basis-points to 10% to 12% from 8% to 10%.
In total, we're increasing our 2023 organic outlook by 200 basis-points from an 8% midpoint to a 10% midpoint. Our strong end-market growth forecast combined with building backlog provides tremendous visibility and confidence in this 2023 outlook. For segment margins, we're raising our guidance range for Electrical Americas by 20 basis-points to a revised range of 23.3% to 23.7%, which reflects the continued strong momentum that we have in this business.
Overall, we are reaffirming our total Eaton margin guidance range of 20.7% to 21.1%. As a reminder, this is a 70 basis-point increase at the midpoint from our 2022 all-time record margin. For eMobility, we are adjusting both the organic growth and margin ranges. This is primarily due to delayed OEM launch plans and higher start-up costs related to large new program wins.
In summary, we continue to be well-positioned to deliver another strong year of financial performance. On page 21, we have the balance of our guidance for 2023 and Q2. Following our strong Q1 performance and improved organic growth expectations for the year, we are raising our full-year EPS range to $8.30 to $8.50, at the midpoint of $8.40, we have raised guidance by $0.16. This represents 11% growth in adjusted EPS in 2023.
We're also raising our capex guidance from $630 million to approximately $700 million to fund additional investments for growth, including in our utility business, where we continue to experience strong increases. Free cash flow guidance remains unchanged. For Q2, we are guiding organic growth of 10% to 12%, segment margins of between 20.5% and 20.9%, representing 60 basis points growth at the midpoint versus prior year. And adjusted EPS in the range of $2.04 to $2.14, a 12% increase versus prior year at the midpoint.
Now, I'll hand it back to Craig to wrap-up the presentation.