A solar panel produces direct current (DC), but your house and the grid run on alternating current (AC). Something has to convert one into the other. The traditional approach wires many panels together into a single large “string” inverter. The microinverter approach puts a small inverter on each panel, so the conversion happens at the source. That architectural choice is the entire foundation of Enphase's business, and the company's own filing is the cleanest place to see what that business actually is.

Enphase describes itself in its Q1 2026 10-Q as “a global energy technology company” that delivers “smart, easy-to-use solutions that manage solar generation, storage and communication on one platform,” with “intelligent microinverters” that “work with virtually every solar panel made.” The product, in other words, is not the panel and not the house battery in isolation — it is the small AC-conversion-plus-software unit that sits underneath each panel and ties the system together.

Because the product is one small device per panel, the company's economics are a volume story, and the filing shows it plainly. Enphase reports that during the three months ended March 31, 2026 it “sold approximately 1.4 million microinverter units and shipped 103.1 MWh of IQ Batteries.” The same sentence gives the year-ago comparison — “approximately 1.5 million microinverter units and 170.1 MWh of IQ Batteries” in Q1 2025 — so the trend, not just the level, is on the page. Read those two pairs together and you have the whole model and its current direction: a high-volume hardware unit, plus an energy-storage attach that moved lower year over year.

Those unit counts sit on top of a revenue line that fell over the same window. The 10-Q reports net revenues of $282.9 million for the quarter, down from $356.1 million a year earlier, with gross profit of $100.4 million against $168.2 million. For a company whose product is a per-unit device, the relationship between units shipped and revenue is the business in miniature: fewer microinverters and battery megawatt-hours shipped show up almost directly in the top line. This is why the unit and MWh figures, not the slogans, are the numbers worth watching.

It is worth being precise about why the conversion happens at the panel at all. A solar module is a string of cells producing low-voltage DC; to feed the grid that has to become 240-volt-class AC, synchronized to the grid's frequency and phase. The string approach gathers many panels into one high-voltage DC run feeding a single large inverter, which means the system carries dangerous DC voltages across the roof and stakes its entire output on one box. Enphase's pitch is the inverse: do the DC-to-AC conversion immediately, on each panel, so the wiring between panels is already grid-style AC and the failure of any one unit is contained. The company frames the resulting product as a single integrated system rather than a kit of parts — in its words, “smart, easy-to-use solutions that manage solar generation, storage and communication on one platform” — which is also why its software, the Enphase App and Ensemble OS, shows up in the filing alongside the hardware. The unit you buy is a panel-level computer that happens to invert power.

The per-panel design has practical consequences a reader can reason about. If one panel is shaded or fails, only that panel's output drops, because each has its own inverter; in a single-string design, one weak panel can drag down the whole string. Enphase makes a related reliability argument in the filing, contrasting itself with “competitors, who utilize a traditional inverter, or offer separate components of solutions,” and saying it has “built-in system redundancy in both photovoltaic generation and energy storage, eliminating the risk that comes with a single point of failure.” The trade-off is that distributing the electronics means manufacturing, shipping, installing, and warranting many small units rather than one big one, which is why unit volume and reliability dominate the company's disclosures.

The second leg, storage, is where the model is evolving, and the filing is specific about the hardware. Enphase says it intends to “scale our global footprint, by delivering advanced, grid-independent microinverter-based storage systems powered by our proprietary Ensemble OS software,” and it describes a fourth-generation Enphase Energy System built around “the IQ Battery 10C, IQ Meter Collar and IQ Combiner 6C.” The company even quantifies the generational improvement: the IQ Battery 10C is “designed to be 30% more energy-dense, occupy 60% less wall space, and cost less than previous models.” The 103.1 MWh shipped in the quarter is the number that tracks how fast the company is becoming a battery business as much as an inverter business.

There is also a policy thread running through the same hardware-unit logic. The filing notes that the Advanced Manufacturing Production Tax Credit “provides for an AMPTC on microinverters of 11 cents per alternating current watt basis,” a per-watt subsidy tied directly to domestic production of the very devices the company counts each quarter. For a business measured in units and watts, a credit denominated in cents per AC watt lands directly on the same ledger the unit counts do — another reason the physical shipment figures, not the marketing, are the right lens on the company.

If you want to watch this business, watch those two counts — microinverter units and battery MWh — quarter over quarter, alongside the revenue line they drive. The figures here were surfaced via SEC filings, the SEC filing data API and evidence index, and the primary record is Enphase's Q1 2026 10-Q on sec.gov. The physics of conversion does not care about the press release; the unit count does.