Clarify the difference between 'customer commissioning' and 'customer validation' for new lithium products (data center UPS, warehouse BESS) and its implications for commercial readiness and revenue recognition.

'Commissioning' means the product is actually deployed and being used by the customer, not just an engineering sample. However, significant work remains for OEM handoffs and hyperscaler validation processes, so meaningful revenue lift is not expected until FY28. “We set our team that they don't get any credit unless they're shipping a product to a customer. So that's exactly what we've done. So in this case, you could see it both ways, validation and commissioning. They're using that battery.”

What is the Q4 growth rate for data centers? How is EnerSys positioning its supply chain to meet exponential growth in this opportunity, especially given gating factors like power availability?

Data center was flat YoY in Q4 due to a tough comp, but mid-to-high teens for the full year. The TPPL technology is well-suited for high-rate demand. EnerSys is investing in supply chain resilience for lithium cells, acknowledging long Asian supply chains, and sees power availability as a key gating factor for new data centers, strengthening BESS proposition. “What actually we hear is one of the biggest gating factors to the new DC is power availability, which I think what's exciting about that is that just adds to the strengthens the bank proposition that we have with our BSS systems that we're planning on launching and just the importance of energy storage overall as the world is facing. These power shortages.”

Are the increased orders and book-to-bill >1 in Motive Power and Transportation early signs of recovery, or just seasonality?

Seeing 'green shoots' and positive activity, but cautiously optimistic due to geopolitical uncertainties impacting GDP and energy prices. Pent-up demand from delayed purchases is evident, and strengthening is expected throughout FY27, with a return to growth by year-end. “I think we're seeing a lot of green shoots. We're seeing a lot of positive activity. But we don't know and why we say we're cautiously optimistic. We don't have any operations in places like the Middle East that -- where we're worried about a direct threat to revenue there.”

ENS

EnerSys (ENS) Q4 FY26 earnings call: guidance and Q&A

Earnings call· Mar 2026 (Q4 FY26)· Industrials· May 21, 2026

Source: earnings call transcript

Executive summary

EnerSys Q4 FY26 — Record EPS and Strategic Framework Benefits

EnerSys delivered record Q4 and full-year adjusted EPS, driven by strategic framework benefits, strong free cash flow, and operational discipline, despite softer volumes in motive power and transportation. The company is leveraging its diversified business and enhanced operating model to navigate dynamic macro conditions, with a focus on high-value growth initiatives and disciplined capital allocation. New lithium solutions are advancing to customer commissioning, and the Greenville plant strategy is being refined for aerospace and defense.

Highlights

Delivered highest quarterly adjusted EPS of $3.19, a 7% increase over prior year.
Achieved full year record sales of $3.8 billion, up 4% year-over-year.
Generated strong free cash flow of $131 million in Q4, with 170% conversion (459% excluding 45X benefits).
Posted highest book-to-bill ratio in nearly 4 years at 1.1, with all lines of business Q4 orders outpacing revenue.
Reduced net debt by approximately $100 million since the end of FY25, bringing leverage ratio to 1.1x EBITDA.

Concerns

Q4 adjusted gross margin decreased by 170 basis points (190 bps without 45X) year-over-year due to $20 million higher freight, tariff, and inflationary costs.
Total tariff exposure remains stable at approximately 22% of U.S. sourcing, with an annualized estimate of $70 million before mitigations.
Experienced direct and indirect impacts from the Middle East conflict, including elevated freight and inflationary pressures in Q4.
Navigated softer but improving forklift and transportation markets, with Motive Power revenue down 6% year-over-year and Specialty transportation sales down high single digits.
Q4 effective tax rate was 22% on an as-reported basis, higher than prior periods due to one-time restructuring and tax law changes.

Guidance & targets

Category	Target	Timeline	Confidence
Net Sales	$915 million to $955 million high materiality	Q1 · FY27	High
Adjusted Diluted EPS (including 45X benefits)	$2.80 to $2.90 per share high materiality	Q1 · FY27	High
Adjusted Diluted EPS (excluding 45X benefits)	$1.61 to $1.71 per share high materiality	Q1 · FY27	High
Full Year Tax Rate (as adjusted, before 45X)	21.5% to 23.5% medium materiality	FY27	Medium
Adjusted Operating Earnings Growth (excluding 45X benefits)	outpace revenue growth medium materiality	FY27	Medium
Volume Recovery (Motive Power & Transportation)	return to growth expected medium materiality	FY27	Medium
Incremental 45X Benefits (Tijuana closure)	approximately $20 million medium materiality	FY28	High
Savings (Monterrey closure)	approximately $19 million medium materiality	FY27	High

Segment performance

Segment	Revenue	YoY	QoQ	Margin
Energy Systems Revenue driven by strong price/mix, positive FX impact, and volume growth in Power Electronics. Operating earnings bolstered by favorable price mix and OpEx savings. Record sales of flagship XM products are expected to continue. The project nature of this business can cause fluctuations quarter-to-quarter. Data center revenue was flat YoY in Q4 due to a particularly strong prior year comp. Adjusted operating earnings: $42 million (up 23% YoY)Adjusted operating margin: 10% (up 130 bps YoY)Volume growth: Power ElectronicsRecord sales: flagship XM productsData center revenue: flat YoY in Q4 (high single digits for full year)Orders: up 36% YoY	$426 million	7%	—	$42 million
Motive Power Revenue decreased due to lower volumes from ongoing market softness, partially offset by FX tailwinds and favorable base mix. Operating earnings impacted by lower volume leverage and higher freight and tariff costs, despite OpEx savings and price/mix improvements. Long-term growth is well-positioned due to electrification, automation, and strong demand for maintenance-free and charger solutions. Adjusted operating earnings: $53 million (down 21% YoY)Adjusted operating margin: 14.2% (down 280 bps YoY)Maintenance free product sales: 30.4% of revenue mix (vs 29.3% in Q4 FY25)Orders: up 19% sequentially	$370 million	-6%	—	$53 million
Specialty Revenue increased driven by favorable price/mix, particularly in Aerospace & Defense (A&D), early contributions from the Rebel acquisition, and FX tailwinds, partially offset by lower transportation volumes. Operating earnings benefited from continued strong performance in A&D. Transportation sales were down high single digits, but orders indicate an early, bumpy recovery. Confidence in reaching sustained mid- to high teens margin performance, though progression may not be linear. Adjusted operating earnings: $18 million (up 20% YoY)Adjusted operating margin: 0.4% (up 90 bps YoY)Transportation orders: up over 30% YoY	$192 million	8%	—	$18 million

ENS operating KPIs by quarter

ENS operating KPIs stated on its earnings calls, by fiscal quarter
KPI	This call Mar 2026 Q4 FY26	Jun 2026 Q1 FY27	Change vs prior quarter
Book-to-bill ratio	1.1 ratio While volumes were down overall for the strong prior year comp, posted our highest book-to-bill in nearly 4 years at 1.1, with all lines of business Q4 orders outpacing revenue. Source: earnings call transcript	1.06 ratio Q1 '27 orders were up 7% versus prior year with our book-to-bill at 1.06 and backlog relatively flat versus prior year and up 2% sequentially. Source: earnings call transcript	-3.6%

Operating figures the company stated on at least two of the calls shown, checked against each call's transcript. Click a figure to read the sentence. A dash means it was not stated that quarter.

Orderbook & backlog

Book-to-bill ratio 1.1 Q4 FY26

Highest in nearly 4 years, with all lines of business Q4 orders outpacing revenue.

Specialty A&D book-to-bill 1.22 Q4 FY26

Orders are really strong, particularly in munitions and space.

Product announcements

Product	Type	Timeline	Details
Lithium data center solution	milestone	Q4 FY26
Battery energy storage solutions for warehouse operators	milestone	Q4 FY26

Deals & partnerships

Rebel Acquisition of hybridized power systems

Early contributions from the Rebel acquisition to Specialty revenue. The Rebel Hyper system is central to the conversation around electrifying the battlefield and charging rechargeable drones at the forward edge of battle.

Capital programs

Tijuana, Mexico facility closure announced

Benefit:approximately $20 million incremental 45X benefits

Closure of Tijuana, Mexico facility and shift to production to Springfield, Missouri plant. Expected to generate approximately $20 million of incremental 45X benefits beginning in fiscal '28. Further optimizes manufacturing footprint, maximizes 45X benefits, supports transition to higher-margin solutions, and mitigates tariff risks.

Monterrey, Mexico plant closure substantially completed

Benefit:approximately $19 million savings

Substantially completed previously announced plant closure. Expected to yield approximately $19 million of savings in fiscal '27, with early realization of related incremental 45X benefits already seen this quarter. Further optimizes manufacturing footprint, maximizes 45X benefits, supports transition to higher-margin solutions, and mitigates tariff risks.

Greenville, SC lithium cell factory in final stages of grant process

Benefit:focused manufacturing footprint aligned with competitive advantages and customer value proposition

Rescoped strategy with an increased focus on applications for customers that value secure, domestic supply chains, particularly within aerospace and defense markets. Leverages more established and commercial improvement cell technology, significantly derisking the program and enabling a faster path to production. In final stages of Department of Energy grant process.

Capital Expenditures

Period spend: $70 million

Benefit:selectively focus on the highest return, highest impact investments

Expectation for fiscal year '27, as heavier investments in TPPL capacity flexibility have been completed.

Risks & headwinds

Higher freight, tariff, and inflationary costs Q4 FY26 and ongoing

$20 million YoY impact in Q4 FY26

Mitigation:Diversified supply chains, increased sourcing flexibility, prioritized manufacturing in region for a region, active management of costs, price pass-through.

Geopolitical disruption (Middle East conflict) Q4 FY26 and ongoing as long as conflict persists

Elevated freight and inflationary pressures, potential temporary pressure on metal costs

Mitigation:Actively manage what can be controlled, mitigate direct and indirect costs, preserve flexibility to respond as conditions evolve.

Heightened economic uncertainty Q4 FY26 and ongoing

Impact on customer buying patterns, experienced a bit in Q4

Mitigation:Focus on operational rigor, manufacturing and supply chain efficiencies, and targeted high-value new product launch initiatives.

Softer forklift and transportation markets Q4 FY26, improving through FY27

Motive Power revenue down 6% YoY; Specialty transportation sales down high single digits

Mitigation:Anticipating orders to trend positively, gradually increasing through FY27 with a return to growth expected as the year progresses, driven by pent-up demand.

One-time tax impact Q4 FY26

Q4 FY26 effective tax rate of 22% (as-reported)

Mitigation:Due to restructuring and tax law changes, not an ongoing operational issue.

What to watch in Q1 FY27

Motive Power and Transportation Volume Recovery

As FY27 progresses

Current Volumes down YoY, but orders up sequentially (Motive Power up 19% QoQ, Specialty transportation up >30% YoY orders)

Target Return to growth in both markets

Why it matters

Indicates broader economic health and demand for core industrial products, crucial for overall revenue growth.

We're cautiously anticipating orders to continue to trend positively gradually increasing through our fiscal '27 with a return to growth expected in both markets as the year progresses, led by motive power.

Find out whether ENS delivers this. Inve re-checks your case every morning.

Q&A highlights

Why were Energy Systems volumes flat despite strong XM shipments and data center demand, given tough prior-year comps? How to think about growth profile in FY27?

Q4 FY25 had pull-in volume due to tariffs, making Q4 FY26 a tough comp. Data center was flat YoY in Q4 but high single digits for the full year. Energy Systems is project-based, leading to quarterly fluctuations. The company is proud of setting records despite Motive Power being in a recessionary position.

“I think the thing that's important to keep in mind is Energy Systems is it's very much a project business. So while we look at our growth and there are a lot of opportunities to continue to grow, it's not always going to be linear quarter-to-quarter.”

asked by Noah Kaye · answered by Andrea Funk

2 min read 6 chapters

Detailed narrative

Strategic Framework & Optimization

EnerSys implemented its 'Energized Strategic Framework' in FY26, yielding meaningful benefits. Core optimization includes the closure of Tijuana, Mexico facility, expected to generate $20 million in incremental 45X benefits from FY28, and the substantial completion of Monterrey, Mexico plant closure, projected to save $19 million in FY27.

The company is also invigorating its operating model, with Centers of Excellence delivering early working capital improvements and contributing to strong free cash flow.

Lithium Strategy & Greenville Plant

The strategy for the Greenville, SC lithium cell factory has been rescoped to focus on aerospace and defense markets, emphasizing secure, domestic supply chains for applications like drones and soldier power. This updated approach leverages more established cell technology, significantly derisking the program and enabling a faster path to production.

EnerSys is in the final stages of the Department of Energy grant process for this facility.

Market Dynamics & Demand Trends

Despite a dynamic macro environment, EnerSys is observing strong underlying momentum in data centers, communications, and defense applications. Motive Power and Transportation markets, while softer, are showing improving trends, with Q4 orders outpacing revenue across all lines of business, resulting in a 1.1 book-to-bill ratio, the highest in nearly four years. The company anticipates a return to growth in these markets as FY27 progresses.

Geopolitical & Tariff Management

EnerSys actively manages its tariff exposure, which remains stable at approximately 22% of U.S. sourcing, with an annualized estimate of $70 million before mitigations. The company has filed for reimbursement on all EPA tariffs. Direct and indirect impacts from the Middle East conflict, such as elevated freight and inflationary pressures, emerged in Q4, but management is confident in its ability to mitigate these higher costs.

New Product Development & Commercialization

New product developments, including lithium data center solutions and battery energy storage solutions for warehouse operators, have advanced to customer commissioning this quarter. While these products are currently being deployed, meaningful revenue lift is not expected until FY28, as the company works through OEM handoffs and hyperscaler validation processes. This shift is anticipated to drive earnings improvement increasingly from top-line growth.

Capital Allocation & Financial Strength

EnerSys maintains a strong financial position with $440 million in cash and cash equivalents and net debt of $684 million, resulting in a leverage ratio of 1.1x EBITDA, well below its target range. The company returned $409 million to shareholders in FY26 through $69 million in Q4 share buybacks (410,000 shares at ~$171/share) and $9.6 million in Q4 dividends, demonstrating a disciplined capital allocation strategy.

Summary of the company's earnings call; see how call summaries are prepared. Not investment advice.