Comprehensive Stock Comparison
Compare Brenmiller Energy Ltd (BNRG) vs Fluence Energy, Inc. (FLNC) Stock
Analyze side-by-side fundamentals, valuation, growth, and profitability to decide which stock is the better buy.
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Quick Verdict
| Category | Winner | Why |
|---|---|---|
| Growth | FLNC | -16.1% revenue growth vs BNRG's -100.0% |
| Stability / Safety | BNRG | Beta 1.10 vs FLNC's 2.25 |
| Dividends | Tie | Neither pays a meaningful dividend |
| Momentum (1Y) | FLNC | +171.7% vs BNRG's -97.5% |
| Efficiency (ROA) | FLNC | -2.3% ROA vs BNRG's -56.8%, ROIC -12.0% vs -150.7% |
Who Each Stock Is For
Income & stability
Growth exposure
Long-term compounding (10Y)
Sleep-well-at-night portfolio
Defensive / Recession hedge
Business Model
What each company does and how it makes money
Brenmiller Energy develops and sells thermal energy storage systems that use crushed volcanic rock to store heat at high temperatures for industrial and utility applications. The company generates revenue primarily from selling its proprietary bGen TES systems and related services to industrial customers and power producers. Its key advantage lies in the proprietary rock-based storage technology — which offers durability, scalability, and the ability to provide dispatchable heat or steam on demand using low-cost materials.
Fluence Energy is a global provider of energy storage systems and AI-powered digital applications for renewable energy integration. It generates revenue primarily through selling battery storage hardware (Gridstack, Sunstack, Edgestack) and providing related services like engineering, maintenance, and energy storage-as-a-service contracts. The company benefits from its joint venture ownership by Siemens and AES Corporation — which provides deep industry expertise, global scale, and established customer relationships in the utility sector.
Revenue Breakdown by Segment
How each company's revenue is distributed across its business units
Segment breakdown not available.
Financial Metrics Comparison
Side-by-side fundamentals across 2 stocks. BestLagging
Financial Scorecard
FLNC leads in 2 of 6 categories — strongest in Profitability & Efficiency and Total Returns. 3 categories are tied.
Financial Metrics (TTM)
FLNC and BNRG operate at a comparable scale, with $2.6B and $0 in trailing revenue. On growth, FLNC holds the edge at +154.4% YoY revenue growth, suggesting stronger near-term business momentum.
| Metric | BNRGBrenmiller Energy… | FLNCFluence Energy, I… |
|---|---|---|
| RevenueTrailing 12 months | $0 | $2.6B |
| EBITDAEarnings before interest/tax | -$10M | -$12M |
| Net IncomeAfter-tax profit | -$7M | -$52M |
| Free Cash FlowCash after capex | -$10M | -$195M |
| Gross MarginGross profit ÷ Revenue | — | +11.7% |
| Operating MarginEBIT ÷ Revenue | — | -1.6% |
| Net MarginNet income ÷ Revenue | — | -2.0% |
| FCF MarginFCF ÷ Revenue | — | -7.6% |
| Rev. Growth (YoY)Latest quarter vs prior year | -100.0% | +154.4% |
| EPS Growth (YoY)Latest quarter vs prior year | +65.4% | -6.3% |
Valuation Metrics
| Metric | BNRGBrenmiller Energy… | FLNCFluence Energy, I… |
|---|---|---|
| Market CapShares × price | $10M | $800M |
| Enterprise ValueMkt cap + debt − cash | $11M | $500M |
| Trailing P/EPrice ÷ TTM EPS | -0.97x | -42.00x |
| Forward P/EPrice ÷ next-FY EPS est. | — | — |
| PEG RatioP/E ÷ EPS growth rate | — | — |
| EV / EBITDAEnterprise value multiple | — | — |
| Price / SalesMarket cap ÷ Revenue | — | 0.35x |
| Price / BookPrice ÷ Book value/share | 1.46x | 3.69x |
| Price / FCFMarket cap ÷ FCF | — | — |
Profitability & Efficiency
FLNC delivers a -10.6% return on equity — every $100 of shareholder capital generates $-11 in annual profit, vs $-151 for BNRG. FLNC carries lower financial leverage with a 0.71x debt-to-equity ratio, signaling a more conservative balance sheet compared to BNRG's 1.08x.
| Metric | BNRGBrenmiller Energy… | FLNCFluence Energy, I… |
|---|---|---|
| ROE (TTM)Return on equity | -151.0% | -10.6% |
| ROA (TTM)Return on assets | -56.8% | -2.3% |
| ROICReturn on invested capital | -150.7% | -12.0% |
| ROCEReturn on capital employed | -124.3% | -4.3% |
| Piotroski ScoreFundamental quality 0–9 | 3 | 3 |
| Debt / EquityFinancial leverage | 1.08x | 0.71x |
| Net DebtTotal debt minus cash | $722,000 | -$300M |
| Cash & Equiv.Liquid assets | $4M | $691M |
| Total DebtShort + long-term debt | $5M | $391M |
| Interest CoverageEBIT ÷ Interest expense | -39.41x | -8.49x |
Total Returns (with DRIP)
A $10,000 investment in FLNC five years ago would be worth $4,440 today (with dividends reinvested), compared to $8 for BNRG. Over the past 12 months, FLNC leads with a +171.7% total return vs BNRG's -97.5%. The 3-year compound annual growth rate (CAGR) favors FLNC at -5.9% vs BNRG's -86.6% — a key indicator of consistent wealth creation.
| Metric | BNRGBrenmiller Energy… | FLNCFluence Energy, I… |
|---|---|---|
| YTD ReturnYear-to-date | -62.7% | -32.5% |
| 1-Year ReturnPast 12 months | -97.5% | +171.7% |
| 3-Year ReturnCumulative with dividends | -99.8% | -16.8% |
| 5-Year ReturnCumulative with dividends | -99.9% | -55.6% |
| 10-Year ReturnCumulative with dividends | -99.9% | -55.6% |
| CAGR (3Y)Annualised 3-year return | -86.6% | -5.9% |
Risk & Volatility
BNRG is the less volatile stock with a 1.10 beta — it tends to amplify market swings less than FLNC's 2.25 beta. A beta below 1.0 means the stock typically moves less than the S&P 500. FLNC currently trades 46.4% from its 52-week high vs BNRG's 2.4% drawdown — a narrower gap to the peak suggests stronger recent price momentum.
| Metric | BNRGBrenmiller Energy… | FLNCFluence Energy, I… |
|---|---|---|
| Beta (5Y)Sensitivity to S&P 500 | 1.10x | 2.25x |
| 52-Week HighHighest price in past year | $52.15 | $33.51 |
| 52-Week LowLowest price in past year | $0.51 | $3.46 |
| % of 52W HighCurrent price vs 52-week peak | +2.4% | +46.4% |
| RSI (14)Momentum oscillator 0–100 | 26.1 | 32.9 |
| Avg Volume (50D)Average daily shares traded | 466K | 4.9M |
Analyst Outlook
| Metric | BNRGBrenmiller Energy… | FLNCFluence Energy, I… |
|---|---|---|
| Analyst RatingConsensus buy/hold/sell | — | Hold |
| Price TargetConsensus 12-month target | — | $21.08 |
| # AnalystsCovering analysts | — | 27 |
| Dividend YieldAnnual dividend ÷ price | — | — |
| Dividend StreakConsecutive years of raises | — | — |
| Dividend / ShareAnnual DPS | — | — |
| Buyback YieldShare repurchases ÷ mkt cap | 0.0% | 0.0% |
Historical Charts
Charts are rendered on first load. Hover for details.
Chart 1Total Return — 5 Years (Rebased to 100)
| Stock | May 22 | Feb 26 | Change |
|---|---|---|---|
| Brenmiller Energy L… (BNRG) | 100 | 0.19 | -99.8% |
| Fluence Energy, Inc. (FLNC) | 100 | 316.82 | +216.8% |
Fluence Energy, Inc. (FLNC) returned -56% over 5 years vs Brenmiller Energy L… (BNRG)'s -100%.
Chart 2Revenue Growth — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| Brenmiller Energy L… (BNRG) | $0.00 | $0.00 | — |
| Fluence Energy, Inc. (FLNC) | $92M | $2.3B | +2355.6% |
Chart 3Net Margin Trend — 10 Years
| Stock | 2019 | 2025 | Change |
|---|---|---|---|
| Brenmiller Energy L… (BNRG) | -130.8% | -15.5% | +88.1% |
| Fluence Energy, Inc. (FLNC) | -51.0% | -2.1% | +95.8% |
Fluence Energy, Inc.'s net margin went from -51% (2019) to -2% (2025).
Chart 4EPS Growth — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| Brenmiller Energy L… (BNRG) | -20.86 | -1.29 | +93.8% |
| Fluence Energy, Inc. (FLNC) | -0.95 | -0.37 | +61.1% |
Chart 5Free Cash Flow — 5 Years
Brenmiller Energy Ltd generated $-10M FCF in 2024 (-19% vs 2021). Fluence Energy, Inc. generated $-175M FCF in 2025 (+39% vs 2021).
BNRG vs FLNC: Frequently Asked Questions
7 questions · data-driven answers · updated daily
01Is BNRG or FLNC a better buy right now?
Analysts rate Fluence Energy, Inc. (FLNC) a "Hold" — based on 27 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.
02Which is the better long-term investment — BNRG or FLNC?
Over the past 5 years, Fluence Energy, Inc. (FLNC) delivered a total return of -55.6%, compared to -99.9% for Brenmiller Energy Ltd (BNRG). A $10,000 investment in FLNC five years ago would be worth approximately $4K today (assuming dividends reinvested). Over 10 years, the gap is even starker: FLNC returned -55.6% versus BNRG's -99.9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.
03Which is safer — BNRG or FLNC?
By beta (market sensitivity over 5 years), Brenmiller Energy Ltd (BNRG) is the lower-risk stock at 1.10β versus Fluence Energy, Inc.'s 2.25β — meaning FLNC is approximately 104% more volatile than BNRG relative to the S&P 500. On balance sheet safety, Fluence Energy, Inc. (FLNC) carries a lower debt/equity ratio of 71% versus 108% for Brenmiller Energy Ltd — giving it more financial flexibility in a downturn.
04Which has better profit margins — BNRG or FLNC?
Brenmiller Energy Ltd (BNRG) is the more profitable company, earning 0.0% net margin versus -2.1% for Fluence Energy, Inc. — meaning it keeps 0.0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: BNRG leads at 0.0% versus -1.5% for FLNC. At the gross margin level — before operating expenses — FLNC leads at 13.1%, 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.
05Which pays a better dividend — BNRG or FLNC?
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.
06Is BNRG or FLNC better for a retirement portfolio?
For long-horizon retirement investors, Brenmiller Energy Ltd (BNRG) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1.10)). Fluence Energy, Inc. (FLNC) carries a higher beta of 2.25 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (BNRG: -99.9%, FLNC: -55.6%), 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.
07What are the main differences between BNRG and FLNC?
Both stocks operate in the Utilities sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both. 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.
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