Technical
Changeover logic, control hardware, conceptual diagrams and lab methodology.
#6Scheduled changeover — the interlocked 2-pole contactor architecture
The correct way to switch between grid and V2L on a schedule: a timed smart relay commanding a mechanically interlocked two-pole contactor changeover, break-before-make, fail-safe to grid.
Reviewed — public with Not-confirmed gates · Last reviewed 2026-06-15
#7Isolation-transformer method (indoors) — keep the one PME/MET earth
Why an indoor V2L feed uses an isolation transformer rather than a TT spike: it galvanically separates the floating output and lets the secondary carry one neutral-earth bond, keeping the single PME/MET earth.
Reviewed — public with Not-confirmed gates · Last reviewed 2026-06-14
#8Manual override & offline fallback — when Wi-Fi/cloud is down or the EV is absent
Designing for the real world: what happens when the smart relay's cloud is down, the Wi-Fi drops, the EV is away or its state of charge is low — the changeover must fail safe to grid.
Reviewed — public with Not-confirmed gates · Last reviewed 2026-06-15
#9Why you must not backfeed a house from a socket (myth-busting safety)
The dangerous shortcut of feeding a house through a socket from a generator or V2L adapter — why it is unsafe and unlawful, and what the correct inlet-and-changeover arrangement is instead.
Reviewed — public with Not-confirmed gates · Last reviewed 2026-06-14