22 · PowerINTERMEDIATE
Power Cost
How much power the grow uses and what it costs you in your currency. You open it from ☰ → My Lab → Power Cost, but the screen is global: it shows you all your zones together, your own and shared ones, even if you came in from one tent.

The four periods
- Day — 24 hours, one point per hour.
- Week — one point per hour.
- Month — one point per day.
- Cycle — from when the active cycle started. It is the only one that is not a fixed span: it stretches with your grow.
Measured, partial or estimated
| Label | Where the number came from |
|---|---|
| measured | All the usage was reported by a meter in the equipment itself. |
| partial | Part measured and part calculated: the meter went quiet for a while, or it was added recently. |
| ≈ estimated | No measurement: watts × time on. |
- An estimate does not go wrong at random: it goes wrong the same way every time.
- Partial is the one worth watching out of the corner of your eye: it is not a money issue, it is a plug that is losing its connection.
- When measurement and estimate overlap, the measurement wins.
- The warm band on the chart marks the actual time the lights were on, not the configured schedule. That difference is information, not a bug in the chart.
Your rate
- You enter currency, kWh price and, if you want, off-peak and peak time slots (they can cross midnight; the rest of the day uses the base price).
- With no rate entered, the system uses your country's average residential cost in dollars — which is not your rate.
- Equipment with no meter and no watts entered stays out of the total. You type in the watts and past usage shows up retroactively, because the history is built from the hours it was on.
Do this
Enter the watts for everything that does not have a meter. It is the step that turns the cost from "approximate" into "believable", and on top of that it is retroactive.
Avoid this
Do not compare this month's total against last month's without looking at the labels. If a piece of equipment went from measured to estimated, the number changed because of that and not because of usage.
How urgent it is
EssentialNothing.
ImportantA real rate entered.
OptionalTime slots and watts for every piece of equipment.