Sourced fact
The scenario starts with user-entered annual metered kWh or battery-added kWh with explicit loss.
Regulation · GB
Annual home charging cost scenario and assumptions
An annual scenario needs an annual charging-energy input and a clearly selected dated tariff row. Show charging loss, region, payment method, VAT basis and incremental standing-charge treatment as separate assumptions. A result using the 2026-07-01 to 2026-09-30 rates is an annualised scenario at that snapshot, not a forecast of later prices.
Ofgem: Price cap unit rates and standing charges
Reviewed
Key facts and evidence
Within the UK, this annualised scenario covers Great Britain as of 13 August 2026. The conclusion is that every result must retain its energy, loss, region, payment, VAT and standing-charge assumptions. E2 rates are effective only from 2026-07-01 to 2026-09-30, so applying them to annual energy illustrates a snapshot scenario rather than future tariff changes.
Ofgem: Price cap unit rates and standing charges
Sourced fact
The selected E2 rate remains limited to 2026-07-01 through 2026-09-30.
Sourced fact
The result exposes region, payment method, VAT basis and standing-charge treatment.
Build a transparent annualised Great Britain home EV charging scenario while keeping every energy, tariff and standing-charge assumption visible.
Input × formula × dated rate
Input: annual metered charging kWh, or annual battery-added kWh with a user-entered loss assumption. Formula: annual supply kWh × selected unit rate, plus user-entered incremental days × selected standing charge. Dated rate: matching Ofgem single-rate region and payment method, VAT included, effective 2026-07-01 to 2026-09-30.
Assumptions shown with the result
The expanded result lists: energy measurement boundary and annual period; charging-loss input or not applicable; Great Britain region; Direct Debit, Standard Credit or prepayment; single-rate tariff scope; VAT included or explicit user basis; incremental standing-charge choice and days; E2 source fingerprint; and the 2026-07-01 to 2026-09-30 effective period.
Snapshot, not forecast
Applying a rate published for one quarter to a full annual energy input is labelled an annualised scenario at that rate snapshot. The page does not claim that the same price continues after 2026-09-30, and the result is withdrawn if the selected source becomes stale.
What to do next
Read the annual result as a reproducible scenario tied to one tariff snapshot, not as a future-price prediction.
Immediate action: Complete every assumption field and confirm the tariff date before viewing a result.
- Stop if energy, region, payment method, VAT basis, tariff period or standing-charge treatment is missing.
Professional hand-off
- Ask the electricity supplier to confirm current tariff terms before using the scenario for a financial decision.
Questions this record can answer
What does the sourced evidence say about input × formula × dated rate?
Input: annual metered charging kWh, or annual battery-added kWh with a user-entered loss assumption. Formula: annual supply kWh × selected unit rate, plus user-entered incremental days × selected standing charge. Dated rate: matching Ofgem single-rate region and payment method, VAT included, effective 2026-07-01 to 2026-09-30.
What does the sourced evidence say about assumptions shown with the result?
The expanded result lists: energy measurement boundary and annual period; charging-loss input or not applicable; Great Britain region; Direct Debit, Standard Credit or prepayment; single-rate tariff scope; VAT included or explicit user basis; incremental standing-charge choice and days; E2 source fingerprint; and the 2026-07-01 to 2026-09-30 effective period.
What does the sourced evidence say about snapshot, not forecast?
Applying a rate published for one quarter to a full annual energy input is labelled an annualised scenario at that rate snapshot. The page does not claim that the same price continues after 2026-09-30, and the result is withdrawn if the selected source becomes stale.