[dredmorbius]

Peak draw. Duty cycle is about 1/3 that typically.

First hour use may approach peak, but again, most of that is incurred regardless.

5 kWh is $0.50 - $1.00, which is the cost of running an hour long for a day, the worst-case scenario. You'd spend a lot more on IoT kit (the Turris Omnia alone is $300) for minimising that cost.

Timers are cheap.