Enphase Stock Plunges 15% After Hours: A Solar Demand Miss and a Sharp Guidance Cut

Enphase Energy (NASDAQ: ENPH) stock plunged about 15% in after-hours trading on Tuesday, October 27, 2026, after the solar company missed Wall Street expectations for the third quarter and guided fourth-quarter revenue sharply lower, citing weak residential demand. The stock had already closed down nearly 2% at $29.76, and extended trading took it to around $25.

What happened

Enphase reported third-quarter revenue of $293.33 million, below analysts' expectations of $304.59 million and down 28.5% from $410.43 million a year earlier. Adjusted earnings were $0.41 per share, missing the $0.51 consensus estimate by $0.10. On a GAAP basis, net income fell 64.9% to $23.39 million, or $0.17 per diluted share, from $66.64 million a year ago, as lower battery and microinverter shipments weighed on results.

The number that rattled investors most was demand through the channel. Management said global sell-through rose only about 1% sequentially in the quarter, far below its earlier expectation for roughly 10% growth. That left revenue near the low end of the company's own $290 million to $320 million guidance range for the quarter — a range that itself included a large block of safe-harbor shipments, which help customers lock in eligibility for remaining tax credits rather than reflecting new end demand.

The guidance cut

Fourth-quarter revenue guidance: $225.0 million to $255.0 million — well below the third quarter's $293.33 million. The outlook includes about $51.2 million of safe-harbor revenue and shipments of 100 to 120 MWh of IQ Batteries, and it assumes sell-through will fall another 10% compared with the third quarter. Enphase also guided GAAP gross margin to 38.0% to 41.0% and non-GAAP gross margin to 40.0% to 43.0%, including roughly 2 percentage points of reciprocal tariff impact.

In other words, the company is not describing a one-quarter wobble. It is telling investors that the end market — homeowners buying rooftop solar and batteries — is expected to get weaker into the end of the year, even as safe-harbor shipments cushion the headline revenue figure.

Why it's blowing up

Enphase was one of the largest after-hours losers on Tuesday, and the reaction spread across clean-energy coverage because the miss combined three things investors punish together: a revenue miss, an earnings miss, and a forward outlook below the quarter just reported. Barron's, via Dow Jones, described shares as slumping in after-hours trading after the company fell short of expectations and lowered its outlook, citing weak residential demand, with the stock down 15% after closing down nearly 2%. Market data snapshots showed a similar scale of decline, with one after-market quote down 15.96% to $25.01 at 5:12 p.m. ET.

The backdrop matters too. Residential solar has been pressured by high interest rates, slower consumer spending, and the hangover from homeowners pulling purchases forward ahead of expiring credits. Enphase's own recent history shows that pattern: earlier coverage noted a sharp sell-through drop in the first quarter of 2026 after a surge in late 2025, workforce cuts tied to the credit's expiration, and only a partial recovery since. Tuesday's report suggests that recovery has stalled again.

Key facts

Q3 revenue: $293.33 million vs. $304.59 million expected; down 28.5% year over year.
Adjusted EPS: $0.41 vs. $0.51 expected — a $0.10 miss. GAAP EPS was $0.17.
Net income: $23.39 million, down 64.9% from $66.64 million a year earlier.
Sell-through: up about 1% sequentially, vs. roughly 10% growth previously expected.
Q4 guidance: revenue of $225 million to $255 million, including about $51.2 million of safe-harbor revenue, assuming sell-through falls 10%.
Stock move: closed at $29.76, down nearly 2%, then fell about 15% after hours to around $25.

What's next

Attention now turns to whether the fourth-quarter guide proves conservative or simply realistic, and to how much of Enphase's revenue continues to come from safe-harbor shipments rather than underlying homeowner demand. The company is still shipping new products — including its IQ Battery 10C and new IQ9 microinverters — and its filings point to longer-term bets such as a solid-state transformer for data centers, with customer pilots targeted for 2027. For the next few quarters, though, the story investors are trading is simpler: residential demand, credit-driven pull-forward, and tariffs. This report is news coverage of a market move, not investment advice.

Sources

FAQ

Why did Enphase stock fall after hours on October 27, 2026?

Enphase missed both revenue and adjusted earnings expectations for Q3 and guided Q4 revenue well below Q3, citing weak residential demand. Shares fell about 15% in extended trading after closing near $29.76.

What were Enphase's Q3 2026 results?

Revenue was $293.33 million, down 28.5% year over year and below the $304.59 million consensus. Adjusted EPS was $0.41 vs. $0.51 expected, while GAAP net income was $23.39 million, or $0.17 per share.

What did Enphase guide for Q4 2026?

Revenue of $225 million to $255 million, including about $51.2 million of safe-harbor revenue and 100 to 120 MWh of IQ Battery shipments. The outlook assumes sell-through declines 10% from Q3.

What is sell-through, and why does it matter here?

Sell-through is how much product distributors and installers actually sell to end customers. Enphase said it rose only about 1% sequentially in Q3, far below the roughly 10% growth it had expected, signaling softer homeowner demand.