Source and publication history
See where the factor came from, when it was published, and which version is attached to an activity.
Emission factor database
Nigerian emission factors, kept properly
Every emissions number is one small sum: how much you did, times an emission factor. The factor is the part people get wrong, and the part an assurer checks first. Emvert keeps a full library of Nigerian factors, so you use the right one every time and can show where it came from.
Versioned. Location-tagged. Source attached to every factor.
NERC grid factorNG-GRID · v2026.1
Version historyv2026.1 active · v2025.1 retained
The factor is a record, not a lonely number. Open it and see the source, year, method, geography and version.
Where reports actually go wrong
The factor is often the weak link
Most companies pull their factors from a PDF a consultant sent, a UK table built for a different grid, or last year's spreadsheet. That causes two quiet problems.
The numbers are foreign averages that do not match how Nigeria makes power or burns fuel. And nobody records which version they used, so this year's report will not line up against last year's, and you cannot prove how you reached a figure.
When the assurer asks where a number came from, the honest answer is usually a shrug. This is the gap Emvert closes.
The factor should be part of the evidence, not a number you have to defend from memory.
A factor here is a record, not a lonely number
Everything that makes the factor trustworthy travels with it
The value and its unit, the source, the year it was published, the gases it covers and the warming-potential basis, the geography it applies to, the dates it is valid between, a short note on method, and a version ID.
One factor. Its full history.
So you are never guessing what a number means, where it came from, or whether it still applies.
Value + unit0.42 kgCO₂e/kWh
SourceNERC grid data
Published2026
GasesCO₂ · CH₄ · N₂O
GeographyDisco region
Validity01 Jan → 31 Dec
Method noteLocation-based
Version IDNG-GRID-v2026.1
Valid dates and geography
Know exactly when a factor applies and whether it belongs to the location where the activity happened.
Gases and warming-potential basis
Keep the gases covered and the chosen warming-potential basis with the factor, rather than assuming them later.
One version ID behind every calculation
The calculation trace records the exact factor version used, linking the library to the audit trail.
Built for Nigeria, not adapted from abroad
The library reflects how Nigerian companies actually operate
From Disco regions to generators that are logged in hours rather than litres, the factor has to match the activity.
Grid electricity, by Disco region
Grid electricity uses the NERC grid factor, tagged by Disco region, because power drawn in Ikeja is not the same as power drawn in Kano.
Generators, hours to litres
Generators get a diesel factor plus a run-hours-to-fuel conversion, since most sites record hours on the log, not litres in the tank. The assumption stays on the record.
Oil and gas, including flaring
Oil and gas operators get gas flaring factors alongside the fuels and processes that matter to their inventory, rather than a generic international average.
Fleets and transport fuels
Fleets get petrol, diesel, and the transport fuels they actually use, with the factor context kept alongside the activity that generated the emissions.
Versioning
Last year's number should never move on its own
When NERC republishes the grid factor, the old one does not disappear. Your 2026 report keeps using the 2026 factor, permanently. New activity picks up the new factor from its valid-from date.
So your history stays fixed, and this year stays comparable to last year. Edit a factor in a cell and you silently change last year's numbers. Emvert does not work that way, and neither should your reporting.
Grid factor historyNever overwrite
2024
v2024.1 retainedHistorical activity remains linked to the factor that was valid when it was recorded.
2025
v2025.1 publishedNew activity uses the new version from its valid-from date.
2026
v2026.1 activeOld versions remain available for historical reports and recalculation.
The engine picks the factor, you do not
Log the activity. Emvert makes the choice.
You should not be scrolling a table deciding which factor applies. Log the activity, where it happened and when, and Emvert selects the factor by location, year, and method.
Fewer decisions, fewer mistakes, and the same input always gives the same choice.
ActivityGrid electricity · 42,000 kWh
ContextIkeja Disco · 2026 · location-based
Factor selectedNG-GRID · v2026.1
Calculation record17,640 kgCO₂e
Every number points back to its factor
The factor library is connected to the carbon ledger
Each figure on your ledger records the exact factor version behind it. Months later, any number still shows its source, and re-running the period returns the same result.
Source and factor version retained with the calculation.
Historical periods stay tied to the factor that was valid at the time.
The same input and context produce the same factor choice.
Calculation traceFactor locked
Activity42,000 kWh grid electricity
FactorNG-GRID · v2026.1
SourceNERC grid data
Emissions17.64 tCO₂e
Re-run this period and the figure remains reproducible because the calculation keeps the factor version, source and method with the number.
Nothing hidden
Open the factor. See the reasoning.
Open any factor to see its source, year, method note, and version. If your auditor prefers a particular source, you can check what you are using and why, without asking anyone. The library grows over time, and Emvert maintains and versions it, so you keep reporting instead of chasing updates.
Factor library
NERC grid · Ikejav2026.1
NERC grid · Kanov2026.1
Diesel generatorNG-DIESEL
Gas flaringNG-FLARE
Petrol fleetNG-PETROL
NG-DIESEL · v2024.1
Diesel combustion factor · Nigeria
UnitkgCO₂e / L
Published2024
GasesCO₂ · CH₄ · N₂O
MethodFuel-based
Valid01 Jan 2024 →
VersionNG-DIESEL-v2024.1
Source note
Source, publication year and method note remain attached to the record. The library grows over time without rewriting the factor history already used in reports.
Source, publication year and method note remain attached to the record. The library grows over time without rewriting the factor history already used in reports.
FAQ
Emission factors in Nigeria, answered
Short answers to the questions people ask when they are trying to defend an emissions number.
What is an emission factor?
A number that turns activity into emissions. Multiply what you did, say litres of diesel or kilowatt-hours of grid power, by the factor, and you get the greenhouse gases. Emvert stores the Nigerian factors and applies them for you.
What is the NERC grid emission factor?
It is the emissions behind a unit of grid electricity in Nigeria. Emvert holds it, tags it by Disco region, and keeps each version with its valid dates, so old reports stay fixed while new activity uses the current figure.
Which emission factor should I use in Nigeria?
The one that matches your location, the year of the activity, and the method you report under. Emvert chooses it for you rather than leaving it to a guess.
Why do emission factors change?
Sources republish them as data improves, and warming-potential bases update. Emvert keeps every version with its valid dates, so nothing you already reported shifts underneath you.
Can I see where a factor came from?
Yes. Open any factor to see its source, year, method note, and version.
Do I have to update the factors myself?
No. Emvert maintains and versions the library. You keep reporting.
Start with the data
Use the right factor without chasing it
Try the free Scope 2 electricity or diesel generator calculator, or book a readiness assessment to see how the factor library fits your reporting workflow.
