Sourced fact
A fixed-charger load assessment requires the property's supply capacity and maximum demand to be assessed by a competent electrical professional.
Installation · GB
Assess solar self-consumption before linking EV charging
Panel ownership alone cannot establish solar self-consumption. A valid assessment needs site-specific generation, household demand, vehicle availability and current tariff evidence. The E2 production set contains no solar profile or current supplier EV-tariff rows, so this page does not calculate savings or a payback period. Any proposal that changes fixed wiring, protection, supply capacity or export behaviour is Red and professional-only.
Reviewed
Key facts and evidence
For a Great Britain home, reviewed as of 2026-08-12, this page withholds a solar-to-EV saving because no site generation, household-load or current supplier-tariff evidence is available. The supported conclusion is narrower: supply capacity and maximum demand require professional assessment, while every fixed circuit, protection or export-related design remains Red and professional-only.
Sourced fact
The owner may provide generation, household-use and charging-needs information without opening or testing electrical equipment.
Sourced fact
Design or installation of fixed conductors, protection, isolation, earthing or charger circuitry is Red and professional-only.
Institution of Engineering and Technology: RCDs for electric vehicle supply equipment (EVSE)
Sourced fact
No savings, self-consumption percentage or payback conclusion is published without matched site and current tariff evidence.
Institution of Engineering and Technology: RCDs for electric vehicle supply equipment (EVSE)
Define the evidence needed for a solar self-consumption assessment while withholding unsupported savings and keeping fixed electrical design professional-only.
Evidence needed
A defensible assessment needs site-matched generation over time, household demand over the same periods, expected vehicle presence, charging requirement and current import or export tariff terms. This record has none of those matched inputs and therefore publishes no economic result.
Electrical hand-off
The owner can describe existing usage and goals. A competent electrical professional determines supply capacity, maximum demand and any fixed-circuit, protection or export-related design; this page provides no wiring, selection, testing or commissioning procedure.
What to do next
Keep the owner contribution to existing records and ordinary usage information; a registered competent EV chargepoint installer must assess the electrical installation.
Immediate action: Arrange a documented site assessment by a registered competent EV chargepoint installer.
- Stop if the assessment reaches fixed wiring, protection, supply equipment, earthing, export behaviour or electrical testing.
- Stop the economic comparison when site generation, household demand or current tariff evidence is missing.
Do not infer from missing evidence
- Keep electrical enclosures closed and make no alteration to fixed equipment, protection or operating limits.
- Do not publish a saving or payback result from generic solar-production assumptions.
Professional hand-off
- Give available generation and household-use records to a registered competent EV chargepoint installer for a site-specific assessment.
- Ask the installer to document supply capacity, maximum demand, proposed control scope and any required network involvement.
Questions this record can answer
What does the sourced evidence say about evidence needed?
A defensible assessment needs site-matched generation over time, household demand over the same periods, expected vehicle presence, charging requirement and current import or export tariff terms. This record has none of those matched inputs and therefore publishes no economic result.
What does the sourced evidence say about electrical hand-off?
The owner can describe existing usage and goals. A competent electrical professional determines supply capacity, maximum demand and any fixed-circuit, protection or export-related design; this page provides no wiring, selection, testing or commissioning procedure.