Public data register

    Supplier data

    PowerGuardian supplier scores

    The 0–100 overall score for each tracked supplier and the six weighted dimensions behind it.

    Provenance

    Provenance documented
    What it is
    The 0–100 overall score for each tracked supplier and the six weighted dimensions behind it.
    How it is produced
    PowerGuardian calculation
    Source
    PowerGuardian supplier monitoring, from published complaints, tariff and service data
    Coverage
    Great Britain household suppliers tracked by PowerGuardian
    Period
    H1 2026
    Last verified
    Not recorded
    Update cadence
    Weekly refresh; editorial review each monitoring cycle
    Where it lives
    Database table supplier_intelligence, read through useSuppliers(); weighting in src/data/supplierMonitor.ts → SCORING_METHODOLOGY
    Delivered by
    Read live from the database

    How the figure is produced

    • Six dimensions are scored 0–100: complaint performance, tariff competitiveness, customer service, direct-debit fairness, consumer transparency and market stability.
    • The overall score is the published weighted average of those six dimensions, using fixed weights.
    • Only suppliers marked as published appear on the site; unpublished rows are held back for review.

    The data

    PowerGuardian supplier scores — published data table
    SupplierOverall scoreComplaint performanceTariff competitivenessCustomer serviceDirect debit fairnessConsumer transparencyMarket stabilityStatusChange this cycleLast updated
    Octopus Energy9286100948310088stable02026-10-12
    So Energy78797983747873stable02026-10-12
    EDF Energy73698372687179stable02026-10-12
    OVO Energy62586659616471stable02026-10-12
    Utility Warehouse61625366585971stable02026-10-12
    E.ON Next60507457486472stable02026-10-12
    British Gas55495452525879watchlist02026-10-12
    Co-op Energy51484950515861watchlist02026-10-12
    ScottishPower50415745445470watchlist02026-10-12
    • PowerGuardian public data register — supplier scores
    • Scores are modelled by PowerGuardian from published complaints, tariff and service data.
    • Coverage is limited to major Great Britain household suppliers open to new customers.

    What this figure cannot tell you

    • Coverage is not comprehensive — only major household suppliers open to new customers are tracked.
    • Scores summarise performance across a cycle and cannot predict an individual customer's experience.
    • Conditional or time-limited incentives are excluded from tariff scoring so they cannot distort rankings.

    Where it is published

    Related records

    • Supplier score weighting — The fixed weights applied to each scoring dimension to produce the overall score.
    • Supplier claim evidence — The dated source behind each individual supplier claim, such as a complaints ratio or a tariff figure.

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