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I worked good out a whole ago, so here's a copy and paste:
I have a power monitoring plug on this setup, so I can tell you exactly how much!
CPU: 2 x Intel® Xeon® CPU E5-2680 v4 @ 2.40GHz
RAM: 512 GiB DDR4 Multi-bit ECC
My disk layout is like so:
This draws a fairly consistent 650W, including a POE router (15.6kwh per day). My current electricity price is 39.38c/kwh... HOWEVER I have a cheap rate of 8c/kwh between midnight and 6:00am, and free power between 11:00am and 2:00pm. I also have solar which tends to cover ~10:00am to ~2:00pm, but its dependant on sunlight so I'll ignore it for now.
So:
12:00am-06:00am = ($0.0800/kwh * 0.65kw) * 06 = $0.312
06:00am-11:00am = ($0.3938/kwh * 0.65kw) * 05 = $1.279
11:00am-02:00pm = ($0.0000/kwh * 0.65kw) * 03 = $0.000
02:00pm-12:00am = ($0.3938/kwh * 0.65kw) * 10 = $2.559
Total = $4.15AUD per 24 hours, or $1,514.75AUD per year
My Merross plug is showing that I'm currently averaging a daily consumpion of 15.021kwh, and I'm not accounting for the hours of solar offset so the actual dollar value will be a little lower. But still. Fair few bucks.
What apps are you running?
Public facing services (via Cloudflare + NPM + fail2ban):
--
Non-public facing:
For example I record my VOIP calls to WAV files which get emailed at the end of a call. There's a script that logs in to my email account and downloads any recorded files, transcribes it with Gemini, then posts it to Discord with a summary of the call at the top, a transcription of the call, and then stats at the bottom (source number, time and date of call, duration).
Another one is a webhook via the VOIP provider - when someone rings, the webhook calls a script that downloads my shared phone book (or falls back to the last downloaded copy if it times out after 2 seconds), matches the incoming number to the phone book, and adds a Discord notification for the person who's ringing. The Discord notification saying who is ringing and where they are from (and any other notes) pops up basically at the same time as the first ring is received.
Also for whatever reason I set up an Arduino for the entry buzzer on our workshop and it sends Discord notifications when the buzzer is turned on/off via timer or by the manual override. I did have it set up to record entry/exits but turns out that got real spammy, real fast.
What's using all this power? I have PhotoPrism, *arr stack, MeTube, nginx, Jellyfin, Syncthing, Vaulvarden, mongoDB and couple of smaller things and it's all running on a single laptop with a tiny RAID. It is all this data storage? I have <10TB so this looks like the biggest difference.