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SEC filingEnphase's Q3 2025 revenue grew 8% YoY to $410.4M, driven by U.S. safe harbor microinverter shipments and a 13% increase in battery MWh shipped, while gross margin expanded 100 bps to 47.8% due to higher net IRA benefits.
Enphase Energy reported net revenues of $410.4 million for the three months ended September 30, 2025, an 8% increase compared to $380.9 million in the same period of 2024. This top-line growth was driven by a 2% increase in microinverter units sold to approximately 1.8 million and a 13% increase in IQ Batteries shipped to 195.0 MWh. The revenue increase was heavily concentrated in the United States, where net revenues grew 23% to $350.0 million, primarily due to $70.9 million in microinverter shipments associated with safe harbor transactions. This was partially offset by a 38% decline in international revenue to $60.4 million, reflecting persistent demand weakness in Europe.
Gross profit increased 10% to $196.2 million, with gross margin expanding 100 basis points to 47.8%. The margin improvement was primarily attributed to a net IRA benefit of 10.3 percentage points, up from 9.2 percentage points a year ago, driven by a higher proportion of sales from U.S.-manufactured microinverters and batteries qualifying for Advanced Manufacturing Production Tax Credits. This benefit more than offset headwinds from higher tariffs and incremental U.S. manufacturing costs. Operating expenses remained well-controlled, with research and development and sales and marketing costs declining slightly due to prior restructuring actions, while general and administrative expenses rose 10% due to higher personnel-related costs. The income tax provision increased to $10.4 million from $5.0 million, reflecting higher projected profitability and equity compensation shortfalls.
The MD&A highlights a stark divergence between U.S. and international performance. The U.S. segment is experiencing a strategic shift, with management explicitly noting increased engagement in the third-party ownership (TPO) segment through safe harbor agreements. These transactions, which allow customers to secure tax credit eligibility ahead of the scheduled December 31, 2025 expiration of the Section 25D residential ITC, are creating higher variability in quarterly revenue recognition but are viewed as an important growth channel. In contrast, the international segment, predominantly Europe, continues to face headwinds from slower macroeconomic growth, adverse government policy changes, and lower utility rates, leading to a significant revenue contraction.
Product momentum is building around the fourth-generation Enphase Energy System, featuring the IQ Battery 10C, which began shipping in June 2025. The new battery is designed to be 30% more energy-dense and cost less than previous models, targeting improved competitiveness in the growing storage market. The company also began accepting pre-orders for its first gallium nitride-powered commercial microinverter, the IQ9N-3P, signaling an expansion into the three-phase small commercial market.
Management's outlook is heavily conditioned on the evolving regulatory and macroeconomic landscape. The enactment of the One Big Beautiful Bill Act of 2025 introduces material uncertainty, as the residential ITC under Section 25D is set to expire at the end of 2025, and new domestic content and Foreign Entity of Concern requirements will phase in starting in 2026. The company is actively working to qualify for these evolving incentives, including shipping U.S.-manufactured IQ Battery 10C units with higher domestic content. Management expects the TPO channel to be an important growth driver following the ITC expiration, as lease providers shift to the Section 48E credit structure. However, the company also warns that prolonged demand softness has led to distributor bankruptcies and higher credit losses, and that trade tariff uncertainties, particularly regarding LFP battery cells sourced exclusively from China, remain a significant risk to cost structure and supply chain stability. The company plans to fund near-term cash requirements from its $1.5 billion in cash and marketable securities and operating cash flows, while continuing to evaluate strategic investments and share repurchases under its existing $268.7 million authorization.
As of September 30, 2025, Enphase Energy holds a robust liquidity position with $401.9 million in cash and cash equivalents and $1.08 billion in marketable securities, totaling nearly $1.48 billion. This compares to $369.1 million in cash and $1.25 billion in marketable securities at year-end 2024. The company's total debt stands at $1.20 billion, consisting of $631.7 million in current debt (Notes due 2026) and $571.9 million in non-current debt (Notes due 2028). The Notes due 2026 mature on March 1, 2026, and are convertible at the holder's option, which drove their reclassification to current liabilities. The company settled its Notes due 2025 for $102.2 million in cash during the period. Shareholders' equity increased to $995.0 million from $833.0 million at year-end, driven by net income and stock-based compensation, partially offset by share repurchases. Inventory grew to $188.7 million from $165.0 million, with finished goods comprising $157.8 million of the total.
The company has $155.0 million in purchase obligations as of September 30, 2025, primarily related to component inventory that its contract manufacturers procure on its behalf. Operating lease liabilities total $30.1 million, with $5.8 million current and $24.3 million non-current, and a weighted average remaining lease term of 6.2 years. Remaining performance obligations (deferred revenue) stand at $457.2 million, with $111.5 million current and $345.7 million non-current. Of this, $28.9 million is expected to be recognized in the remainder of 2025, $109.5 million in 2026, and the balance through 2030 and beyond. Warranty obligations total $210.1 million, with $31.5 million current and $178.7 million non-current, reflecting the long-tailed nature of product warranties.
During the nine months ended September 30, 2025, Enphase repurchased and retired 2.3 million shares of common stock at an average cost of $56.58 per share, totaling $130.0 million. This compares to $191.7 million in repurchases during the same period in 2024. As of September 30, 2025, $268.7 million remains available under the $1.0 billion 2023 Repurchase Program. The company did not repurchase any shares during the three months ended September 30, 2025. No dividends were declared or paid. Capital expenditures were $30.9 million for the nine-month period. The company also invested $6.3 million in convertible notes issued by Complete Solaria, a related party, and $9.8 million in a tax equity fund.
Enphase operates as a single reportable segment. For the nine months ended September 30, 2025, U.S. revenue was $884.6 million (78.3% of total), while international revenue was $245.1 million (21.7%). This represents a significant shift from the prior year period when U.S. revenue was $632.7 million (66.8%) and international was $315.0 million (33.2%). Revenue from products delivered at a point in time was $1.03 billion, while products and services delivered over time contributed $94.7 million.
For the nine months ended September 30, 2025, Enphase Energy reported net income of $133.4 million, yet generated only $89.0 million in operating cash flow, indicating a significant cash conversion gap. The primary driver of this divergence was a substantial net investment in working capital. Deferred revenues fell by $136.6 million, and prepaid expenses and other assets surged by $218.1 million, which together consumed cash despite a $116.9 million increase in accounts payable and accrued liabilities. This contrasts sharply with the prior year period, where a $209.0 million reduction in accounts receivable boosted operating cash flow to $346.4 million.
Capital expenditures remained disciplined at $30.9 million, up slightly from $25.5 million in the prior year. With operating cash flow of $89.0 million, implied free cash flow stands at $58.1 million. This FCF was insufficient to cover the $146.6 million returned to shareholders via $130.0 million in share repurchases and $16.7 million in tax withholdings on equity awards. The company also settled $102.2 million of its Notes due 2025, further straining cash balances.
A notable anomaly is the $12.3 million non-cash loss from changes in the fair value of debt securities, which reduced net income but was added back in the cash flow statement. Despite the sharp decline in operating cash flow, management continued aggressive capital returns, with total financing outflows of $243.4 million. Overall, cash, cash equivalents, and restricted cash decreased by $62.2 million to $401.9 million, reflecting a period where operational cash generation was outpaced by shareholder returns and debt settlement.