ENPH vs RUN: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. ENPH and RUN share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined ENPH and RUN exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Enphase Energy is a leading provider of solar microinverters and home-energy systems. Its core product is the microinverter, a small device attached to each individual solar panel that converts the panel's direct current into the alternating current used in homes and on the grid. This panel-level approach differs from traditional string inverters that handle many panels at once, offering advantages in reliability, safety, monitoring, and performance when panels are shaded or fail. Enphase has expanded from microinverters into a broader home-energy platform, including its IQ Battery storage systems, EV chargers, and software that lets homeowners monitor and manage solar production, battery storage, and consumption through an app. The company sells primarily to installers and distributors who deploy its products in residential rooftop solar projects, mostly in the United States and Europe. Enphase earns revenue from hardware sales of microinverters and batteries, with a growing contribution from storage and software. It is headquartered in Fremont, California, and has been one of the most recognizable names in residential solar technology.

Full ENPH guide

Sunrun (RUN) is the largest residential solar company in the United States. It designs, installs, finances, and services rooftop solar panel systems and home battery storage for homeowners. Its core model is not selling panels outright but offering solar as a service: customers sign long-term leases or power purchase agreements (PPAs) and pay little or nothing upfront, while Sunrun owns the system and collects recurring payments over 20-plus years. This builds a large, contracted base of future cash flows.

Full RUN guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• ENPH drivers: Microinverter leadership; Battery storage expansion.
• RUN drivers: Storage attach rates; Recurring subscriber base.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Enphase's business is highly sensitive to interest rates, since most residential solar is financed; higher rates raise monthly costs and depress demand, and Morgan Stanley flagged rate pressure on clean-tech valuations in October 2026. For RUN, sunrun is highly sensitive to interest rates because its model depends on financing long-term contracts; higher rates raise its cost of capital and compress the value of future cash flows.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick ENPH if you believe its drivers more; RUN if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the ENPH and RUN guides.

ENPH. Enphase closed near $31 on October 16, 2026, down ~22% over three months and ~58% below its 52-week high. At about 14 times forward earnings and ~3 times sales, the multiple has compressed to downturn levels as consensus sees 2026 revenue falling about 19%. The October 27 Q3 report (consensus ~$0.50 EPS on ~$304 million revenue) and any 2027 demand commentary are the next catalysts.

RUN. Sunrun is valued on the long-term contracted value of its subscriber base and its storage and grid-services optionality rather than current GAAP earnings. After a roughly 61% fall in 2026 the shares trade at about half of sales and half of book value, yet the market is discounting about $15.2 billion of debt, negative free cash flow and forecasts for lower earnings in 2027. Q3 2026 results on November 4 (consensus EPS about $0.32 on about $820 million of revenue) are the next data point.

Headline figures (approximate, October 2026): ENPH shows revenue (ttm) ~$1.33B, revenue growth (q2 2026, yoy) ~-20%, gross / operating margin ~30% / ~18%, net income (ttm) ~$134M; RUN shows revenue (ttm) ~$3.5 billion, q2 2026 revenue (yoy) ~$870 million (+53%), ~19% above estimates, net income (ttm) ~$401 million (GAAP), operating margin ~4%.

ENPH and RUN are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined ENPH and RUN exposure against your real portfolio. It is not an investment adviser.