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Invinity Energy Systems PLC (IES) fair value: what the stock is really worth

As of Nov 5, 2026: fair value (intrinsic value) of Invinity Energy Systems PLC stock £0.04, price £0.11, that is 59.5% below the price, quality 29 out of 100. Rating: strongly overvalued. Calculated from audited financials with one of our 26 valuation models and 37 quality factors, updated daily.

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Industrials GB · ISIN JE00BLR94N79

IE Invinity Energy Systems PLC logo Thin data Nov 1, 2026

Invinity Energy Systems PLC

IES · LSE
Very expensive, weak quality

Our calculation puts a fair price 60% below what the stock costs today.

Revenue last quarter +135% vs. a year ago.
Expensive Growth (revenue 5y +82.3 %/yr in GBP)
Fair value £0.0425 · Strongly overvalued (−59.5%)
Quality 29/100
Negative free cash flow
Trails peers (2/8)
Narrow moat 8/100 · thin data
Thin data
⚠ Dilution
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What runs behind every stock

26 valuation models 8 families, DCF to NCAV 37 quality factors margins, balance sheet, cashflow, debt 6 AI factors moat, what no ratio measures 2,000+ data points verified, per stock, median

69 individual criteria per stock, every one traceable See the method →

Price vs Fair Value

£1.33 £0.0810 Fair Value £0.0425 Aug 2021 Nov 2026

White line = price, green steps = our fair value per fiscal year. As of Nov 1, 2026.

How to read this chart

60‑month range £0.0810 – £1.33 · fair‑value band £0.0255 – £0.0595 · the £0.1050 price screens above the £0.0425 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). As of Nov 1, 2026.

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Company profile

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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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 £0.1050, while our model-based Fair Value estimate is £0.0425, 60% below the price, so the stock looks 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 data coverage at low.

Scenario range: £0.0255 (bear) to £0.0595 (bull), the price of £0.1050 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 29/100 (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 £59.7M Micro · P/S ratio 16.7 · EPS (TTM) £−0.0500 · Return on equity −36.5% · Return on assets (EBIT) −36.7% · Operating margin −182% · Revenue (TTM) £8.2M · Revenue growth (YoY) +135%.

Competitive moat

Our AI-assisted moat analysis scores the competitive advantage at 8 out of 100 (low confidence).

What moves the price

The share trades about 73% below its 52-week high and at its 52-week low, currently below its 200-day average.

For context, the median of 10 Industrials peers we cover trades at −35% fair-value upside, at −60%, IES screens richer than that median.

Fair Value models

Bear £0.0255 Fair Value £0.0425 Bull £0.0595
Price £0.1050 · Downside -59.5%
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above starts from their evidence-weighted blend, not from a single model. In cyclical trough or peak years, after dilution or a stock split it is adjusted afterwards, so it can sit above or below the models. 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. If a model's bull case is above four times its base value, the table shows that limit with a > sign (like the overall Bull above): beyond it no assumption holds. Coverage ⓘCoverage = 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.
Best data coverage
NCAV (Graham) £0.0300 £0.0500 £0.0700 51
All 1 models by family
Asset-Based
NCAV (Graham) £0.0300 £0.0500 £0.0700 51

The fair value above starts from this blend and is adjusted for dilution from new shares.

Open the full fair value analysis →

Quality Score breakdown

Overall quality 29/100

It rates the business: profits, how they develop, real cash, balance sheet, investing and share count.

Profitability 0
How much profit the company makes from its sales and capital
Quality Growth 84
Are margins and returns getting better?
Cashflow 5
Do the profits arrive as real cash?
Financial strength 76
Debt, balance sheet and risk of trouble
Investment 8
Does it invest with discipline instead of growing at any price?
Low Volatility 30
How calm the share price moves, does not count
Price momentum 9
Price momentum of the last 3 to 12 months, does not count
Near the 52-week high 0
Distance to the 52-week high, does not count
New shares 0
Buys back shares or issues new ones?

Open the full quality analysis →

Revenue & earnings trend

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%
Start year 2020 (pandemic). Over 10 years: +0.1% a year
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%
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
not computed

IES screens overvalued: fair value 60% below the price. Compare with Contemporary Amperex Technology Co →

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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 · 561 stocks

Beats the industry median on 2/7 measures
Overall it trails its industry peers.
Valuation
Quality Score 29 · Bottom 25%
Fair Value upside −59.5% · Below median
Profitability
Return on assets −29.7% · Bottom 25%
Operating margin (12 months) −182.3% · Bottom 25%
Growth and dividend
Revenue growth (quarter YoY) 134.6% · Top 25%

Valuation Multiplesvs Electrical Equipment & Parts median · lower = cheaper

P/B 0.90× · Cheapest 25%
P/S (12 months) 7.30× · Priciest 25%

Strength profile in five axes (Snowflake)

VALUEFUTUREPASTHEALTHDIVIDEND
This stock
VALUEFUTUREPASTHEALTHDIVIDEND
Sector peers
VALUE (fair-value potential)0 · sector 0
FUTURE (revenue growth)100 · sector 65
PAST (return on equity)0 · sector 26
HEALTH (low debt)0 · sector 97
DIVIDEND (yield)0 · sector 23

VALUE 0: the price sits above our fair-value range.

Context: sector, industry, market

Values & ESG

Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.

None of the checked exposures detected

Similar stocks

10 more Electrical Equipment & Parts stocks, each showing price versus our Fair Value estimate.

Stock Price Fair Value vs Fair Value Compare
Contemporary Amperex Technology Co 300750 ¥264.06 ¥648.35 +146% vs IES
Sungrow Power Supply Co 300274 ¥85.14 ¥182.32 +114% vs IES
NARI Technology Co 600406 ¥23.53 ¥29.39 +25% vs IES
Vertiv Holdings VRT $205.55 $178.64 −13% vs IES
Legrand SA LR €127.55 €83.20 −35% vs IES
Prysmian S.p.A PRY €100.20 €64.29 −36% vs IES
ABB Ltd ABBN CHF 67.50 CHF 29.53 −56% vs IES
Samsung SDI Co 006400 509,000 KRW 153,766 KRW −70% vs IES
Delta Electronics (Thailand) Public Company DELTA 187.00 THB 39.14 THB −79% vs IES
LG Energy Solution, Ltd 373220 346,000 KRW 53,325 KRW −85% vs IES

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Invinity Energy Systems PLC: fair value per Fair Value Calculator

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 Nov 1, 2026, our model estimates a fair value of £0.0425 versus a price of £0.1050, about 60% lower (overvalued).
What is the fair value of IES?
Our model-based fair value for Invinity Energy Systems PLC is £0.0425 (as of Nov 1, 2026), built from audited fundamentals. The current price: £0.1050.
What is the quality score of IES?
Invinity Energy Systems PLC has a Quality Score of 29/100. 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 Nov 1, 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 60% lower versus a price of £0.1050 (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 £8.2M (latest available figure, as of Nov 1, 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 Nov 1, 2026), against a price of £0.1050. 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 Nov 1, 2026, IES trades above its calculated fair value: price £0.1050, fair value £0.0425, a gap of about −60% (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 (£0.1050); the fair value is what the company's own numbers justify (£0.0425). For Invinity Energy Systems PLC the two are £0.0625 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 £59.7M (market capitalisation, as of Nov 1, 2026). Per share that is £0.1050; 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 Nov 1, 2026, price £0.1050). 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 Nov 1, 2026): return on equity −36.5%. They feed the Quality Score of 29/100, which measures business quality independently of the share price.
How far is IES from its 52-week high?
Invinity Energy Systems PLC trades at £0.1050, about 73% below its 52-week high of £0.3940 and at the low of £0.1050 (as of Nov 5, 2026). Distance from the high says nothing about value: that is what the fair value of £0.0425 is for.
Which stocks are comparable to Invinity Energy Systems PLC?
From the same area (Industrials) we also value Contemporary Amperex Technology Co, ABB Ltd, Vertiv Holdings, Delta Electronics (Thailand) Public Company, 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 Nov 1, 2026: price £0.1050, calculated fair value £0.0425 (−60%), Quality Score 29/100, 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 15.6% 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 Nov 5, 2026 was £0.1050. Our model-based fair value is £0.0425, about 60% lower (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 (29/100) 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 £59.7M. 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 16.7 (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 −36.5% (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 −182% (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 +135% 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 (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 net (fiscal year 2025). The company holds more cash than debt, a safety cushion.
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