NEOV vs GNRC vs STEM vs SHLS vs ENPH

For growth investors, NeoVolta Inc.

(NEOV) is the stronger pick with 218. 6% revenue growth year-over-year, versus -2. 0% for Generac Holdings Inc. (GNRC). Enphase Energy, Inc. (ENPH) offers the better valuation at 27. 5x trailing P/E (17. 6x forward), making it the more compelling value choice. Analysts rate Generac Holdings Inc. (GNRC) a "Buy" — based on 39 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, Enphase Energy, Inc.

(ENPH) is the cheapest at 27. 5x versus Generac Holdings Inc. at 99. 2x. On forward P/E, Enphase Energy, Inc. is actually cheaper at 17. 6x.

Over the past 5 years, Generac Holdings Inc.

(GNRC) delivered a total return of -18. 5%, compared to -97. 8% for Stem, Inc. (STEM). Over 10 years, the gap is even starker: ENPH returned +1738% versus STEM's -95. 5%. 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), NeoVolta Inc.

(NEOV) is the lower-risk stock at 1. 55β versus Stem, Inc. 's 3. 66β — meaning STEM is approximately 135% more volatile than NEOV relative to the S&P 500. On balance sheet safety, Shoals Technologies Group, Inc. (SHLS) carries a lower debt/equity ratio of 29% versus 114% for Enphase Energy, Inc. — giving it more financial flexibility in a downturn.

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

(NEOV) is pulling ahead at 218. 6% versus -2. 0% for Generac Holdings Inc. (GNRC). On earnings-per-share growth, the picture is similar: Stem, Inc. grew EPS 91. 3% year-over-year, compared to -116. 5% for NeoVolta Inc.. Over a 3-year CAGR, NEOV leads at 23. 5% 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.

Stem, Inc.

(STEM) is the more profitable company, earning 88. 2% net margin versus -59. 7% for NeoVolta Inc. — meaning it keeps 88. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: SHLS leads at 11. 9% versus -56. 0% for NEOV. At the gross margin level — before operating expenses — ENPH leads at 46. 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.

On forward earnings alone, Enphase Energy, Inc.

(ENPH) trades at 17. 6x forward P/E versus 30. 9x for Generac Holdings Inc. — 13. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for STEM: 137. 2% to $20. 67.

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, Enphase Energy, Inc.

(ENPH) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+1738% 10Y return). Stem, Inc. (STEM) carries a higher beta of 3. 66 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ENPH: +1738%, STEM: -95. 5%), 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 (NEOV (Industrials) and GNRC (Industrials) and STEM (Technology) and SHLS (Energy) and ENPH (Energy)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: NEOV is a small-cap high-growth stock; GNRC is a mid-cap quality compounder stock; STEM is a small-cap quality compounder stock; SHLS is a small-cap high-growth stock; ENPH is a small-cap quality compounder 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.