Invinity Energy Systems PLC (IES) fair value: what the stock is really worth
We calculate from audited financials what Invinity Energy Systems PLC is really worth. The fair value tells you whether the price is too high or too low, the quality score (0 to 100) how solid the business behind it is. 26 models, 37 quality factors, updated daily.
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Price vs Fair Value
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Sep 13, 2026.
How to read this chart
60‑month range £0.0810 – £1.35 · fair‑value band £0.0255 – £0.0595 · the £0.1850 price screens above the £0.0425 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Sep 13, 2026.
Invinity Energy Systems plc manufactures and sells vanadium flow batteries and related hardware for energy storage markets in Asia, Australia, Europe, and North America. It also provides other services. The company sells its products under the Invinity ENDURIUM and Invinity VS3 brands.
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Invinity Energy Systems plc manufactures and sells vanadium flow batteries and related hardware for energy storage markets in Asia, Australia, Europe, and North America. It also provides other services. The company sells its products under the Invinity ENDURIUM and Invinity VS3 brands. It serves utilities and power producers, commercial and industrial, and independent industries. Invinity Energy Systems plc was incorporated in 2006 and is based in London, the United Kingdom.
Stock analysis
Invinity Energy Systems PLC (IES) currently trades at £0.1850, while our model-based Fair Value estimate is £0.0425, implying the stock looks roughly 335.4% overvalued today.
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Valuation
How firm this estimate is: it rests on 1 models at a data quality of 95/100, which puts the evidence level at low.
Scenario range: £0.0255 (bear) to £0.0595 (bull), the price of £0.1850 sits above it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target.
Quality & growth
The Quality Score stands at 24/100 (below-average quality), in the Industrials sector.
Expensive Growth: The company is growing, but growth may require heavy reinvestment or weak cash conversion.
Invinity Energy Systems PLC reported revenue of £8.2M in FY2025 versus £3.2M in FY2021, a compound +26.6%/yr. Reported net income was −£24.1M in FY2025.
Key figures
Market cap 137M GBX · P/S ratio 55.8 · EPS (TTM) £−0.0500 · Return on equity −32.5% · Return on assets (EBIT) −36.7% · Operating margin −3,964% · Revenue (TTM) £3.6M · Revenue growth (YoY) −84.4%.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 32 out of 100 (low confidence).
What moves the price
For context, the median of 10 Industrials peers we cover trades at −35% fair-value upside, at −77%, IES screens richer than that median.
Fair Value models
Bear £0.0255Fair Value £0.0425Bull £0.0595
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above is their evidence-weighted blend, not the output of a single model.Bear ⓘBear = the cautious scenario: the same model computed with conservative anchors (lower growth, margins and valuation multiples). Together with Bull it frames a plausible valuation range, not a price target.BaseBull ⓘBull = the optimistic scenario: the same model computed with favourable anchors (higher growth, margins and valuation multiples). Together with Bear it frames a plausible valuation range, not a price target.Evidence ⓘEvidence = how well-backed THIS model's estimate is for this stock (0–100): how complete and reliable its input data are, and how well the model fits the company. The final Fair Value is an evidence-weighted blend, so better-evidenced models count more. Green ≥70, amber 50–69, grey below 50.
Growth Quality ⓘGrowth is valuable only when reinvestment earns attractive returns (Aswath Damodaran): sustainable growth depends on return on capital, reinvestment and efficiency. Basis: total company revenue over the periods shown on the cards (3Y/5Y/all years), not per share, so a merger can show up as a growth jump; per-share earnings growth is in the value-creation card.38/100
The company is growing, but growth may require heavy reinvestment or weak cash conversion.
Revenue growth 1 year
+63.2%
Revenue growth 3 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+40.6%
Revenue growth 5 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+82.3%
Revenue growth 10 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+0.1%
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Profit margin (trend) ⓘOperating margin then vs now, from reported annual statements. A falling margin after a boom year is the classic peak-earnings signal: the growth rate then leans on an inflated base.
−3,071.9% (2020) → −295.0% (2025)
What shareholders gained per year ⓘWe only publish this rate when it is defensible. Reason: fiscal 2025 is a loss year, no rate is defined from a loss
Compare Invinity Energy Systems PLC with another stock
Price, fair value, quality and upside side by side.
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Peer GroupⓘHow this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.Electrical Equipment & Parts · 544 stocks
Beats the industry median on 1/7 measures
Overall it trails its industry peers.
Valuation
Quality Score29 · Bottom 25%
Fair Value upside−81% · Bottom 25%
Profitability
Return on assets−20% · Bottom 25%
Operating margin (TTM)−182% · Bottom 25%
Growth and dividend
Revenue growth135% · Top 25%
Valuation Multiplesvs Electrical Equipment & Parts median · lower = cheaper
P/B2.78× · Pricier than median
P/S (TTM)22.58× · Priciest 25%
Strength profile in five axes (Snowflake)
This stockSector peers
VALUE (fair-value potential)0· sector 0
FUTURE (revenue growth)100· sector 58
PAST (return on equity)0· sector 26
HEALTH (low debt)0· sector 97
DIVIDEND (yield)0· sector 22
VALUE 0: the price sits above our fair-value range.
For bloggers, editors and developers: paste this into your site or blog (a “Custom HTML” block in WordPress), it shows the current fair value and links back here. Free, plain HTML, and welcome. Full data streams (CSV/JSON) at /developers.
Cite: Fair Value Calculator (2026). "Invinity Energy Systems PLC Fair Value". https://www.fairvalue-calculator.com/stock/IES
Frequently asked questions
Is Invinity Energy Systems PLC (IES) overvalued or undervalued?
As of Sep 13, 2026, our model estimates a fair value of £0.0425 versus a price of £0.1850, about −77% upside (overvalued).
What is the fair value of IES?
Our model-based fair value for Invinity Energy Systems PLC is £0.0425 (as of Sep 13, 2026), built from audited fundamentals. The current price: £0.1850.
What is the quality score of IES?
Invinity Energy Systems PLC has a Quality Score of 24/100. It measures business quality (profitability, growth, cash flow, balance-sheet strength, investment discipline, share issuance). Market factors such as price momentum and volatility do not enter the number; they are shown separately in the detail view.
What is the price target for Invinity Energy Systems PLC (IES)?
Our model-based price target is the fair value of £0.0425 (as of Sep 13, 2026) from 1 valuation models. Cautious scenario £0.0255, optimistic scenario £0.0595. It is a calculation from audited fundamentals, not an analyst target.
What is the Invinity Energy Systems PLC stock forecast for 2026?
Our models put fair value at £0.0425, about −77% upside versus a price of £0.1850 (overvalued). Cautious scenario £0.0255, optimistic scenario £0.0595. The calculation is refreshed regularly with new filings.
What is the revenue of Invinity Energy Systems PLC (IES)?
Invinity Energy Systems PLC reported trailing-twelve-month revenue of about £3.6M (latest available figure, as of Sep 13, 2026).
What is the intrinsic value of Invinity Energy Systems PLC (IES)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For Invinity Energy Systems PLC it is £0.0425 per share (as of Sep 13, 2026), against a price of £0.1850. It is the blended result of 1 valuation models (cash flow, earnings, asset, dividend).
Is Invinity Energy Systems PLC stock overvalued or undervalued in 2026?
As of Sep 13, 2026, IES trades above its calculated fair value: price £0.1850, fair value £0.0425, a gap of about −77% (overvalued). The calculation is refreshed with each new quarterly report, so the verdict can change during the year.
Is fair value the same as the market price of IES?
No. The price is what the market pays today (£0.1850); the fair value is what the company's own numbers justify (£0.0425). For Invinity Energy Systems PLC the two are £0.1425 per share apart. That gap is exactly why we show both numbers side by side.
How much is Invinity Energy Systems PLC worth?
The market values Invinity Energy Systems PLC at about 137M GBX (market capitalisation, as of Sep 13, 2026). Per share that is £0.1850; our models calculate a fair value of £0.0425 per share.
What do the bullish and bearish scenarios say about IES?
Our models span a range for Invinity Energy Systems PLC: cautious scenario £0.0255, base £0.0425, optimistic £0.0595 per share (as of Sep 13, 2026, price £0.1850). The range comes from different growth and margin assumptions, not from analyst opinions.
How solid is the balance sheet of Invinity Energy Systems PLC (IES)?
Balance-sheet figures for Invinity Energy Systems PLC (as of Sep 13, 2026): return on equity −36.5%. They feed the Quality Score of 24/100, which measures business quality independently of the share price.
Which stocks are comparable to Invinity Energy Systems PLC?
From the same area (Industrials) we also value Contemporary Amperex Technology Co, ABB Ltd, Delta Electronics (Thailand) Public Company, Vertiv Holdings, among others. Each of them has its own fair-value calculation on this site using the same models, so the comparison is like for like.
Is Invinity Energy Systems PLC stock attractive at the current price?
The data as of Sep 13, 2026: price £0.1850, calculated fair value £0.0425 (−77%), Quality Score 24/100, from 1 models. Whether that fits your horizon and risk tolerance is your call. We provide the calculation, not investment advice.
How is the fair value of IES calculated?
We run Invinity Energy Systems PLC through 1 models from four families: discounted cash flow, earnings models, asset and balance-sheet models, and dividend models. Every model gets the same audited fundamentals; the result is the weighted average of £0.0425, with the spread shown as a cautious and an optimistic scenario.
Is it still worth investing in stocks now?
The global stock market currently sits 16.1 % above its aggregate fair value. Invinity Energy Systems PLC itself currently trades above fair value. An expensive market is no reason to stay out and no reason to buy everything at once: keep a broad savings plan running, buy single stocks only with money you can do without, and hold part of your money liquid while the market is high. The full picture including sectors is on is it worth investing now.
What is the share price of Invinity Energy Systems PLC (IES)?
The closing price on Sep 21, 2026 was £0.1850. Our model-based fair value is £0.0425, about −77% upside (overvalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with Invinity Energy Systems PLC right now?
The price sits above even our optimistic bull case (£0.0595). The favourable scenario is already priced in. Weak quality (24/100) and above fair value at the same time, the margin of safety is missing on both counts. The large gap to fair value rests on thin data (low evidence): fewer applicable models and a shorter history. Read it with extra caution. A fairly wide model range (£0.0255 to £0.0595) leaves room in how you read the outcome.
Key figures of Invinity Energy Systems PLC
How large is the market capitalisation of Invinity Energy Systems PLC (IES)?
The market capitalisation of Invinity Energy Systems PLC is 137M GBX. The stock-market value of the whole company: share price times number of shares. It is what the market asks for the entire business today.
What is the P/S ratio of Invinity Energy Systems PLC (IES)?
The price-to-sales ratio of Invinity Energy Systems PLC is 55.8 (last twelve months). Price to sales: market value relative to yearly revenue. Useful when profit is thin or distorted.
What are the earnings per share of Invinity Energy Systems PLC (IES)?
Earnings per share at Invinity Energy Systems PLC are £−0.0500. Earnings per share over the last twelve months: total profit spread across every single share.
What is the return on equity of Invinity Energy Systems PLC (IES)?
The return on equity (ROE) of Invinity Energy Systems PLC is −32.5% (last twelve months). Profit relative to shareholders' equity, how efficiently the company works with its owners' money.
What is the EBIT return on assets of Invinity Energy Systems PLC (IES)?
On an EBIT basis the return on assets of Invinity Energy Systems PLC is −36.7% (avg 5y). Operating profit (EBIT) relative to everything the company owns, as a multi-year average. It describes the business model rather than one good or bad year.
What is the operating margin of Invinity Energy Systems PLC (IES)?
The operating margin of Invinity Energy Systems PLC is −3,964% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at Invinity Energy Systems PLC (IES)?
Revenue at Invinity Energy Systems PLC is growing −84.4% versus a year earlier (3y avg +40.6%). How much revenue grew versus a year earlier (YoY). The 3-year average next to it puts the single year in context.
How much free cash flow does Invinity Energy Systems PLC (IES) generate?
The free cash flow of Invinity Energy Systems PLC is −34.2M GBX (fiscal year 2025). The cash truly left after running and investing in the business, this is what pays dividends and buybacks.
How much net cash does Invinity Energy Systems PLC (IES) hold?
Invinity Energy Systems PLC holds more cash than debt, 26.8M GBX net (fiscal year 2025). The company holds more cash than debt, a safety cushion.
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Thin data
Sep 13, 2026