Wood Pellet Price per MWh: How to Compare Tenders Using NCV and Moisture
A wood-pellet quotation expressed only in euros per tonne can make two offers look directly comparable when they are not. If the delivered pellets have different net calorific values, moisture contents or commercial-mass records, each tonne represents a different quantity of fuel energy. Procurement teams that normalize bids to euros per megawatt-hour can see the commercial difference before award and can build a transparent invoice-adjustment mechanism into the contract.
This guide is for industrial buyers, energy managers, finance teams, laboratories and contract administrators in Europe. It explains how to compare quotations, define the reporting basis, calculate delivered fuel energy and write a practical decision rule. It is not a statement of Nord Panels product values, a fuel certificate, legal advice or a substitute for the current contract, test standard and local metrology rules.
Nord Panels manufactures wood pellets in Kazakhstan exclusively from Kazakhstan-sourced raw materials. Buyers can review the available commercial supply information on the Nord Panels wood-pellet page, then use the framework below to define their own tender and settlement requirements.
1. Separate mass price from energy price
A tonne is a mass unit; a megawatt-hour is an energy unit. A quotation of €280/t does not state how much fuel energy the buyer receives unless the contract also fixes or measures the net calorific value on a clearly defined basis.
| Commercial measure | Unit | What it answers | What it does not answer |
|---|---|---|---|
| Mass price | €/t | What one delivered tonne costs | How much energy that tonne contains |
| Fuel energy price | €/MWh fuel | What the delivered fuel energy costs | How efficiently the buyer’s plant converts it |
| Useful-heat price | €/MWh useful heat | What usable heat costs after conversion | Pellet quality alone; it also depends on the plant and operating conditions |
Procurement principle: Compare fuel offers on the same energy basis, then evaluate useful heat separately with a plant-performance assumption that the contract identifies.
ISO 18125:2017 explains that practical combustion uses the net calorific value at constant pressure and provides the calculation framework for net calorific value from calorimetric results.2 That makes NCV a suitable energy input when the tender states the test method and result basis.
2. Write the result basis before requesting prices
The notation beside a laboratory result matters. ISO 18134-1:2022 and ISO 18134-2:2024 state that solid-biofuel moisture reported “as received” is expressed on the total mass of the test sample, or wet basis.3 A dry-basis result and an as-received result are not interchangeable inputs.
The RFQ should define all of the following in one data dictionary:
| Data item | Contract definition to freeze |
|---|---|
| Commercial mass | Net delivered mass, source record, permitted deductions and rounding |
| Energy property | Net calorific value at constant pressure |
| Result basis | As received, unless another basis is explicitly selected and converted |
| NCV unit | kWh/kg or MJ/kg, with one stated conversion convention |
| Moisture | Total moisture, as received, wet basis |
| Test method | Current agreed edition of ISO 18125 and ISO 18134 part |
| Sample identity | Delivery, lot, sub-lot or composite represented by the result |
| Laboratory | Named laboratory or agreed competence/accreditation requirement |
| Decision rule | Treatment of uncertainty, rounding and borderline results |
ISO 17225-2:2021 defines fuel-quality classes and specifications for graded wood pellets for non-industrial and industrial use.5 It can support a product specification, but a class designation does not replace the buyer’s commercial energy-pricing formula. Likewise, an ENplus reference should be checked against the current scheme documents and the exact certificate scope; it should not be treated as an automatic invoice rule.7
3. Use one transparent conversion formula
When NCV is reported in kWh/kg on an as-received basis, the delivered fuel-energy calculation is unusually simple:
Delivered fuel energy (MWh) = net mass (t) × NCV as received (kWh/kg)
The factors of 1,000 cancel because one tonne contains 1,000 kilograms and one megawatt-hour contains 1,000 kilowatt-hours.
The normalized fuel price is therefore:
Fuel price (€/MWh) = price (€/t) ÷ NCV as received (kWh/kg)
If the laboratory reports NCV in MJ/kg, the contract should either require a consistent kWh/kg report or state the conversion convention explicitly. Do not mix units inside a spreadsheet and do not compare an as-received value with a dry-basis value.
4. Worked tender comparison
The values below are hypothetical examples only. They are not Nord Panels specifications, quotations or guarantees.
| Offer | Quoted price | NCV as received | Normalized fuel price | Ranking by €/t | Ranking by €/MWh |
|---|---|---|---|---|---|
| A | €285/t | 4.80 kWh/kg | €59.38/MWh | 2 | 1 |
| B | €275/t | 4.50 kWh/kg | €61.11/MWh | 1 | 3 |
| C | €295/t | 4.95 kWh/kg | €59.60/MWh | 3 | 2 |
Offer B is the cheapest per tonne but the most expensive per MWh in this example. The table does not prove that A is the best overall offer; ash, durability, fines, logistics, payment terms, sustainability evidence and plant compatibility still matter. It shows why price per tonne alone is an incomplete commercial comparison.
A second hypothetical example demonstrates the delivery calculation. A net delivery of 24.6 t with an NCV of 4.72 kWh/kg represents:
24.6 × 4.72 = 116.112 MWh of delivered fuel energy
The contract should state the number of decimals retained at each step and whether rounding occurs at the delivery, monthly statement or invoice-total level.
5. Do not calculate useful heat until the boundary is defined
Fuel energy enters the plant. Useful heat leaves the defined system boundary. The difference depends on boiler efficiency, load, cycling, maintenance, heat losses, auxiliary energy and the measurement method. A buyer should therefore avoid calling €/MWh fuel “heat cost.”
If a tender comparison uses an assumed conversion efficiency, show it as a separate scenario:
Useful-heat cost = fuel-energy cost ÷ accepted conversion efficiency
For example, a hypothetical €60/MWh fuel cost divided by an assumed 0.86 efficiency gives €69.77/MWh useful heat. This is a sensitivity calculation, not a pellet certificate. If useful heat determines payment, the agreement becomes a performance/measurement arrangement and must define meters, system boundary, calibration, outages and data treatment separately.
6. Define commercial mass with legal metrology in mind
Energy settlement begins with net mass. In the EU, Directive 2014/31/EU covers non-automatic weighing instruments used to determine weight for commercial transactions and establishes accuracy, conformity and traceability requirements.8 The European Commission also identifies weighing instruments as essential to transparency and fairness in trade.9
In Great Britain, official guidance states that weighing and measuring equipment used in business must be passed as fit for trade by a Weights and Measures Inspector or approved verifier, with requalification after repair or adjustment.10 EU/EEA, Great Britain, Switzerland and other European destinations have different legal frameworks, so the contract should identify the applicable jurisdiction rather than copying a generic “EU-compliant weighbridge” sentence into every purchase order.
A delivery-mass clause should identify the weighing location, instrument record, gross/tare sequence, vehicle identification, time stamps, permitted reweigh route and document that prevails if records differ.
7. Link the result to the represented lot
An NCV result is commercially useful only when the contract states what material it represents. The buyer should connect every value to a delivery, batch or defined composite period and retain the sampling and preparation records.
UK Forest Research explains that biomass standards provide internationally accepted procedures for measuring fuel properties and lists the key standards for moisture, sampling, sample preparation, calorific value, ash, bulk density and durability.6 A price formula should therefore reference the whole evidence chain, not only the final number on a certificate.
| Evidence link | Minimum record |
|---|---|
| Delivery identity | PO, vehicle/container, seal where used, date and supplier lot |
| Commercial mass | Gross, tare, net, instrument/bridge identity and ticket |
| Sample | Sampler, time, increments, composite method and seals |
| Preparation | Laboratory receipt, reduction and preparation reference |
| Test | Method edition, result basis, unit, result and uncertainty where reported |
| Settlement | Formula version, rounding, adjustment and approval trail |
This article deliberately does not repeat the full sampling and lot-release workflow covered in the existing delivery-acceptance guide. The purchasing calculation should simply require that its NCV and moisture inputs come from the agreed evidence chain.
8. Choose a settlement model that matches the risk
Different purchases justify different mechanisms. A fixed-price-per-tonne order can be appropriate when the specification is narrow and the commercial risk is accepted. An energy-normalized model is more transparent when energy variation materially changes the value received.
| Settlement model | How it works | Main control required |
|---|---|---|
| Fixed €/t | Invoice equals net tonnes × fixed rate | Clear quality limits and nonconformity route |
| Tender comparison only | Bids are ranked in €/MWh, but invoice remains €/t | One normalized evaluation basis |
| NCV price adjustment | Invoice rate changes according to verified NCV | Baseline, formula, cap/floor and laboratory route |
| Delivered-energy settlement | Invoice equals verified MWh × agreed €/MWh | Mass, NCV, sample representation and timing |
| Monthly composite | Multiple deliveries settle on one agreed composite | Defined pooling, weighting and missing-data rule |
A price-adjustment formula should be symmetrical and understandable. It should not penalize low NCV without stating how high NCV is treated. It should also avoid double-counting moisture if NCV is already reported on an as-received basis, because that energy result already reflects the sample’s condition.
9. Pre-agree uncertainty, retest and borderline decisions
Laboratory results have uncertainty and practical tests have repeatability limits. ILAC G8:09/2019 was developed to help laboratories and customers apply decision rules when making statements of conformity under ISO/IEC 17025.11 The commercial contract should decide in advance how uncertainty affects a price adjustment or conformity decision.
| Borderline issue | Contract question |
|---|---|
| Result near baseline | Is adjustment based on the reported value or a guard band? |
| Replicate variation | Which averaging and outlier rule applies? |
| Buyer/supplier disagreement | Which retained sample and referee laboratory control? |
| Missing result | Is provisional invoicing permitted, and how is it reconciled? |
| Delayed result | What payment portion may be held pending final data? |
| Rounding | At what calculation stage and decimal precision? |
Avoid writing “supplier and buyer will agree later.” A later negotiation occurs after the financial outcome is known and invites dispute. The tender should include the decision rule, or at minimum require both parties to sign it before the first shipment.
10. Build a comparable tender sheet
The commercial evaluation sheet should lock formulas and keep supplier-entered cells separate from buyer calculations. Each bidder should receive the same definitions.
| Tender field | Supplier response | Buyer normalization |
|---|---|---|
| Price basis | €/t and Incoterm/delivery point | Common landed-cost boundary |
| NCV | Guaranteed/typical value, unit and basis | Convert only to agreed kWh/kg as received |
| Moisture | Limit, test method and basis | Check consistency with NCV basis |
| Mass | Delivery document and weighing route | Apply jurisdiction-specific trade rules |
| Quality evidence | Specification, methods and certificate scope | Verify exact product, site and validity |
| Adjustment | Proposed formula and limits | Apply one approved model to all offers |
| Claims process | Notice, sample, retest and time limits | Compare operational and financial risk |
A procurement team should protect formula cells, version the workbook and have a second reviewer reproduce at least one calculation manually. The evaluation record should preserve the original bid, clarifications, data conversions and award decision.
11. Suggested RFQ wording
A buyer can adapt the following paragraph:
Quote the delivered price in currency per metric tonne and provide the guaranteed or declared net calorific value at constant pressure in kWh/kg on an as-received basis. State the applicable ISO 18125 method, total-moisture method and result basis. Delivered energy will be calculated as verified net tonnes multiplied by the accepted NCV in kWh/kg. Identify the commercial weighing record, sampling representation, laboratory route, result timing, rounding, measurement-uncertainty decision rule, retained-sample/retest process and any symmetric price-adjustment formula. Do not substitute a dry-basis or gross-calorific-value result without the conversion and approval defined in the contract.
The final purchase order should also identify delivery terms, quality limits, packaging, sustainability documentation, governing law, claims timing and the precedence of documents.
12. Twelve checks before contract award
| Check | Pass condition |
|---|---|
| One energy term | NCV at constant pressure is defined |
| One result basis | As-received or another expressly converted basis |
| One unit | kWh/kg for the working calculation |
| Verified mass route | Commercial weighing record identified |
| Represented material | Delivery/lot/composite relationship defined |
| Current methods | Standard numbers and editions stated |
| Comparable bids | All offers normalized at one commercial boundary |
| No double moisture adjustment | Moisture is not charged twice through NCV and a second formula |
| Decision rule | Uncertainty and borderline treatment agreed |
| Retest route | Retained sample, timing and referee laboratory defined |
| Protected calculation | Formula, rounding and version controlled |
| Local rules checked | EU/EEA, GB, Switzerland or other destination addressed correctly |
13. Turn energy data into a purchasing decision
The most useful pellet-price comparison is not the longest specification sheet. It is a short, auditable chain from verified tonnes and a correctly based NCV result to delivered MWh and the agreed commercial outcome.
Nord Panels produces wood pellets in Kazakhstan exclusively from Kazakhstan-sourced raw materials. To discuss available commercial supply information, review the wood-pellet product page and contact the Nord Panels team. Buyers should define the final energy-pricing formula, test route and legal terms for their own plant, destination and contract.