A zone holds one time window. So a tariff that is cheap twice a day — overnight and again for a couple of hours in the evening, say — doesn't fit in a single zone.
Put the second window in a zone of another type, with the same buy price.
An example that works
| Zone type | From – To | Days | Buy price |
|---|---|---|---|
| Night | 23:00 – 07:00 | every day | 0.18 |
| Late evening | 20:00 – 22:00 | every day | 0.18 |
| Day | 07:00 – 20:00 (default) | every day | 0.32 |
The hub prices both cheap windows at 0.18. This was measured on a hub running exactly this plan: a load in the late-evening window and a load in the night window were each charged at the same all-in price, and a load in the day window at the higher one.
The second window keeps its own type's name — so it appears as Late evening, not as a second "Night", in the week view and in the cost split by zone.
Three things to know
Pick the type by priority, not by its name. A zone type is a label plus a place in the overlap order: critical peak, holiday, weekend, evening peak, morning peak, night, late evening, day. Nothing about a type implies hours, so a cheap midday window can live in whichever free type suits you.
Watch a Weekend zone. On the days it runs, a Weekend zone outranks both of your cheap windows, so neither applies there. That's usually what you want — just decide it rather than discover it.
Overlaps resolve by priority. If your second window overlaps the night window, Night wins. With the same price in both, that changes nothing in the cost.
How many zones you get
A plan holds up to seven, and Add zone picks a type that isn't in use yet. Keep one zone per type: the hub accepts two zones of the same type, but it only notes it in the log, and the cost split by zone keeps them on one line — so you lose the ability to tell them apart.
Check it before you trust it
Open the week by zones. It shows which zone applies in every hour of the week and names the winner for each overlap it finds. If an hour looks wrong, check the zone's days first, then the priority order, then the hub's clock.