With the advent of time-of-use billing for electricity here, I'd like to suspend BOINC tasks for the peak rate periods. Is there a way to specify more than one time period in the day-of-week override?

I suspect you would have to use cron jobs (Unix) or Task Scheduler (Windows) and make separate calls like

"c:\Program Files\BOINC\boinccmd.exe" --set_run_mode never {duration}

at the beginnings of your peak rate periods, where {duration} is the time (in seconds) how long should BOINC keep the computation snoozed.
(Maybe you will have to set the current dir into BOINC data folder prior to launching the command - for successful authentication.)

Peter

While living in Germany, I've been using an electricity tariff with 3 differently expensive rates during working days and 2 over weekends. The most expensive one was active twice a day - the peak rate periods at the morning and evening (like <night>-<morning peak>-<daytime>-<evening peak>-<night>) .

I could imagine I'd like to suspend BOINC especially during these periods back then.

Peter

The most expensive one was active twice a day - the peak rate periods at the morning and evening (like <night>-<morning peak>-<daytime>-<evening peak>-<night>)

That is pretty much the scheme they have adopted here for the winter. The summer peaks are configured differently for air conditioning use mid-day.

If I can configure it for overlapping midnight, then I can at least get it running 10hrs/day in the cheapest period. But there are 6 hours of mid-peak in mid-day that would be excluded.

It's too bad it doesn't take a comma-separated list.