Key Highlights

  • Enphase Energy (NASDAQ:ENPH) fell 16.03% at the close on October 28, 2026, with an intraday low of 17.1%, after guiding fourth-quarter revenue to USD 225 million to USD 255 million.
  • Third-quarter revenue was USD 293.3 million, so the guidance midpoint of USD 240 million is about 18.2% lower than the quarter just reported, simple arithmetic on two published numbers.
  • The company said guidance assumes sell-through, sales from channel partners to end customers, will be 10% below the third quarter, pointing to weaker installation demand.
  • SolarEdge (NASDAQ:SEDG) fell 9.5% the same day, according to published market data, but no company release explaining that move was found, and its cause is not verified.

The Guidance Reset

Enphase Energy (NASDAQ:ENPH) reported third-quarter revenue of USD 293.3 million and guided the fourth quarter to USD 225 million to USD 255 million, according to the company release. The low end is about 23.3% below the third quarter and the high end about 13.1% below, simple arithmetic on published numbers. The stock closed down 16.03% on October 28, 2026, after touching 17.1% lower during the session, while after-hours reports of declines ranged from 10% to 15.7%. Those after-hours figures come from different recaps and conflict, so the close is the more reliable measure of the day. Guidance is management's own forecast, so a figure this far below the last reported quarter is a direct signal about order books.

What Sell-Through Means

Enphase sells microinverters and related equipment to distributors and installers, and revenue recognised at that step is called sell-in. Sell-through is the next step, when installers sell systems to homeowners. The company said its guidance assumes sell-through 10% below the third quarter. When end demand slows, channel partners order less, which shows up in the next sell-in number. For Enphase Energy (NASDAQ:ENPH), a guide that implies a revenue drop larger than the sell-through decline would suggest channel inventory is being trimmed too, though the material reviewed did not break that out. Investors therefore watch sell-through closely as an early indicator of what the next quarter's revenue will look like.

Peers, Risks and Watch List

SolarEdge (NASDAQ:SEDG) fell 9.5% on October 28, but its cause was not verified and no release was found, so any link to Enphase demand remains an assumption. Residential solar is sensitive to interest rates, and the Federal Reserve held its target range at 3.75% to 4.00% on October 28, with the 10-year yield near 5.02% to 5.04% according to published market data. Higher financing costs weigh on installer demand. Watch the full third-quarter report details, installer commentary and any changes to the guide. Enphase Energy (NASDAQ:ENPH) shares could move again on any revision. The risk for the sector is that weaker residential demand persists, while the recovery case rests on lower rates, which are not guaranteed.

Where Things Stand

Enphase Energy (NASDAQ:ENPH) dropped about 16% because its fourth-quarter revenue guide of USD 225 million to USD 255 million sits well below the USD 293.3 million just reported, and because it assumes sell-through 10% below the third quarter. SolarEdge (NASDAQ:SEDG) fell 9.5% without a verified reason. The next catalysts are installer demand data and the next earnings report. Higher rates and thinner demand are the stated and implied pressures, while the share price now embeds a lower revenue base. This is not investment advice.