FTCI vs ARRY vs SHLS vs NXT vs FSLR

For growth investors, FTC Solar, Inc.

(FTCI) is the stronger pick with 110. 5% revenue growth year-over-year, versus 18. 4% for Nextpower Inc. (NXT). 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 FTC Solar, Inc. (FTCI) a "Buy" — based on 12 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, Array Technologies, Inc. is actually cheaper at 11. 7x — 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 Nextpower Inc. 's 11. 15x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Nextpower Inc.

(NXT) delivered a total return of +289. 7%, compared to -96. 6% for FTC Solar, Inc. (FTCI). Over 10 years, the gap is even starker: FSLR returned +324. 1% versus FTCI's -97. 0%. 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), First Solar, Inc.

(FSLR) is the lower-risk stock at 1. 39β versus FTC Solar, Inc. 's 2. 75β — meaning FTCI is approximately 98% more volatile than FSLR relative to the S&P 500. On balance sheet safety, First Solar, Inc. (FSLR) carries a lower debt/equity ratio of 5% versus 3% for Array Technologies, Inc. — giving it more financial flexibility in a downturn.

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

(FTCI) is pulling ahead at 110. 5% versus 18. 4% for Nextpower Inc. (NXT). On earnings-per-share growth, the picture is similar: Array Technologies, Inc. grew EPS 62. 6% year-over-year, compared to -43. 3% for FTC Solar, Inc.. Over a 3-year CAGR, NXT leads at 26. 6% 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 -77. 2% for FTC Solar, Inc. — 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 -33. 5% for FTCI. At the gross margin level — before operating expenses — FSLR leads at 40. 6%, 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 Nextpower Inc. 's 11. 15x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Array Technologies, Inc. (ARRY) trades at 11. 7x forward P/E versus 27. 7x for Nextpower Inc. — 15. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for FTCI: 251. 3% to $15. 00.

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, First Solar, Inc.

(FSLR) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+324. 1% 10Y return). FTC Solar, Inc. (FTCI) carries a higher beta of 2. 75 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (FSLR: +324. 1%, FTCI: -97. 0%), 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 (FTCI (Energy) and ARRY (Energy) and SHLS (Energy) and NXT (Technology) and FSLR (Energy)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

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.