reynir4d ago
I had a thought to schedule the daily builds at builds.robur.coop when the energy prices are low. My suspicion is that there is a (strong?) correlation between energy prices and CO2 emissions - lower prices means less CO2. Is there data backing up this idea?
Show threaddch  

@reynir how much change in energy costs do you see during the day?

I run my big CI / poudriere builds when it's sunny because I've got good solar set up here, but I don't think our daily energy charge changes much. I will find that out tho.

Mar 19 at 9:41amWeb
Show threadreynir4d ago

@dch it can change quite a lot! Here's a screenshot from today (without fees and taxes).

On sunny but still days during the sunnier times of year it's usually very cheap around noon and then up quite a lot in the evening. Wind usually has more inertia, so you don't often see as dramatic changes within the same day due to changes in wind.

Show threadreynir4d ago
@dch today it's not so windy, and especially in the afternoon and evening where there will be very little wind (1-3 m/s), so not quite an average day.
Show threaddch  4d ago

@reynir and that’s price for the consumer? I don’t think we see such variability passed onto us as consumers in Vienna.

https://oekostrom.at/spot-preis/#chart

SPOT Preis - oekostrom AG

Mit dem oeko Spot Tarif Strom direkt von der Börse ohne versteckte Kosten. Erfahre auf dieser Seite die aktuellen Spotpreise der Strombörse.

oekostrom AG
Show threadreynir4d ago

@dch it's the spot price so there are fees and taxes on top such as transmission fees. Here is a screenshot with fees and taxes. The unit is dkk/kWh btw.

They cut the tax on electricity for consumers by quite much recently. "Temporarily", but I doubt they dare put it back.