I agree, 500W is when my 2 TVs, 2 desktop PCs, 2 32 inch monitors, NAS, router, 3 wifi APs and 3/10 lights are on and my fridge, freezer and other miscellaneous non-smart devices are plugged in.

Idle power with NAS, router and wifi APs are on, and TVs, PCs, Monitors are in standby is about 150W. It can be lower, but it is convenient and with $0.10/kWh it is just $10 a month.

We are a family of 5 in Germany, we have a 70€/month electricity bill. 2500kWh per year with one person (me) in home office. 3000kWh with two persons and the kids being more at home.

My house uses about 1500-1800kWh per month. We just bought it though and are working to get it efficient.

How is that possible? Electrical heating / AC?

Unclear. We just got solar panels and are auditing all the energy users now. There were some resistive heaters running we didn’t know about that pushed an extra 500kWh before. I think we got it down to about 1600 kWh. I think with all the he mods we are doing we can get it down below 1000 kWh but it will take time and more efficiency improving.

I would suggest to get a smart electricity meter so you can see "live" power usage. I'm not familiar with resistive heaters, but it appears they are purely electrical, which means they are only 100% efficient. Heat pumps (you can use AC for heating) are >300% efficient.

For reference: my 2 person household uses less than 3000 kWh / year (gas heating and electrical cooking), so even 1000 kWh / month would be a lot imo.

The solar system provides a whole house real time meter so we should be able to track down usage easier. We’ll see. We have two teenagers and a larger house and workshop, so, quite a few variables to figure out. We are converting the whole house to heat pumps. These units are state of the art and hit 370% efficiency.

I’m in the same boat. Electric baseboard heaters are what’re killing us.

To the 500W figure mentioned above, I plugged our little space heater into a kill-a-watt meter and it measured it at 500W/day.

Resistive electric heating is brutally expensive. I’m looking into heat pumps before next winter.

We have a boiler and some resistive heating. We are going with whole house (6500 sqft total) heat pump system. Ends up being several large commercial Fujitsu units that are efficient down to -20F (Colorado weather). We expect to dramatically cut our energy consumption with this move and be totally off natural gas. Combined with the solar and battery system we are getting we should be completely energy independent and net producing electricity which is cool :)

500W/day is a nonsensical unit; I assume you either mean 500W or 500Wh/day (different by a factor of 24)

Definitely. Electricity at the current UK price cap is pretty much bang on £2.50 per watt-year, so there are some eye watering annual standby costs in that spreadsheet.