RNW vs RUN vs SPWR vs ARRY vs FSLR

For growth investors, Sunrun Inc.

(RUN) is the stronger pick with 45. 1% revenue growth year-over-year, versus 2. 9% for SunPower Inc. (SPWR). Sunrun Inc. (RUN) offers the better valuation at 8. 1x trailing P/E (22. 8x forward), making it the more compelling value choice. Analysts rate ReNew Energy Global Plc (RNW) a "Buy" — based on 6 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Sunrun Inc.

(RUN) is the cheapest at 8. 1x versus ReNew Energy Global Plc at 46. 9x. On forward P/E, ReNew Energy Global Plc is actually cheaper at 0. 4x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, First Solar, Inc.

(FSLR) delivered a total return of +187. 6%, compared to -81. 3% for SunPower Inc. (SPWR). Over 10 years, the gap is even starker: FSLR returned +324. 1% versus SPWR's -81. 3%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), ReNew Energy Global Plc (RNW) is the lower-risk stock at 0.

62β versus Sunrun Inc. 's 2. 89β — meaning RUN is approximately 364% more volatile than RNW relative to the S&P 500. On balance sheet safety, First Solar, Inc. (FSLR) carries a lower debt/equity ratio of 5% versus 6% for ReNew Energy Global Plc — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Sunrun Inc.

(RUN) is pulling ahead at 45. 1% versus 2. 9% for SunPower Inc. (SPWR). On earnings-per-share growth, the picture is similar: Sunrun Inc. grew EPS 113. 3% year-over-year, compared to 0. 0% for SunPower Inc.. Over a 3-year CAGR, SPWR leads at 65. 3% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

First Solar, Inc.

(FSLR) is the more profitable company, earning 29. 3% net margin versus -10. 5% for SunPower Inc. — meaning it keeps 29. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: RNW leads at 53. 5% versus -4. 3% for RUN. At the gross margin level — before operating expenses — RNW leads at 91. 1%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

On forward earnings alone, ReNew Energy Global Plc (RNW) trades at 0.

4x forward P/E versus 22. 8x for Sunrun Inc. — 22. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for SPWR: 1450. 0% to $15. 81.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, ReNew Energy Global Plc (RNW) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

62)). SunPower Inc. (SPWR) carries a higher beta of 2. 13 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (RNW: -50. 5%, SPWR: -81. 3%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

These companies operate in different sectors (RNW (Utilities) and RUN (Energy) and SPWR (Energy) and ARRY (Energy) and FSLR (Energy)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: RNW is a small-cap high-growth stock; RUN is a small-cap high-growth stock; SPWR is a small-cap quality compounder stock; ARRY is a small-cap high-growth stock; FSLR is a mid-cap high-growth stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.