TURB vs SHLS vs SPWR vs ENPH vs FSLR

For growth investors, First Solar, Inc.

(FSLR) is the stronger pick with 24. 1% revenue growth year-over-year, versus -28. 1% for Turbo Energy, S. A. American Depositary Shares (TURB). First Solar, Inc. (FSLR) offers the better valuation at 15. 1x trailing P/E (12. 0x forward), making it the more compelling value choice. Analysts rate Shoals Technologies Group, Inc. (SHLS) a "Buy" — based on 23 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, First Solar, Inc.

(FSLR) is the cheapest at 15. 1x versus Shoals Technologies Group, Inc. at 39. 2x. On forward P/E, SunPower Inc. is actually cheaper at 5. 1x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: First Solar, Inc. wins at 0. 39x versus Enphase Energy, Inc. 's 2. 79x — a PEG below 1. 0 traditionally signals the market is underpricing 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: ENPH returned +1738% 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), Turbo Energy, S.

A. American Depositary Shares (TURB) is the lower-risk stock at -1. 26β versus SunPower Inc. 's 2. 13β — meaning SPWR is approximately -269% more volatile than TURB relative to the S&P 500. On balance sheet safety, First Solar, Inc. (FSLR) carries a lower debt/equity ratio of 5% versus 2% for Turbo Energy, S. A. American Depositary Shares — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), First Solar, Inc.

(FSLR) is pulling ahead at 24. 1% versus -28. 1% for Turbo Energy, S. A. American Depositary Shares (TURB). On earnings-per-share growth, the picture is similar: Enphase Energy, Inc. grew EPS 72. 0% year-over-year, compared to -50. 0% for Turbo Energy, S. A. American Depositary Shares. 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 -35. 4% for Turbo Energy, S. A. American Depositary Shares — meaning it keeps 29. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: FSLR leads at 32. 3% versus -42. 2% for TURB. At the gross margin level — before operating expenses — SPWR leads at 48. 5%, 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.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, First Solar, Inc. (FSLR) is the more undervalued stock at a PEG of 0. 39x versus Enphase Energy, Inc. 's 2. 79x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, SunPower Inc. (SPWR) trades at 5. 1x forward P/E versus 19. 4x for Shoals Technologies Group, Inc. — 14. 3x 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, Turbo Energy, S.

A. American Depositary Shares (TURB) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β -1. 26)). 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 (TURB: -70. 3%, 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.

Both stocks operate in the Energy sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: TURB is a small-cap quality compounder stock; SHLS is a small-cap high-growth stock; SPWR is a small-cap quality compounder stock; ENPH is a small-cap quality compounder 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.