Energy self-sufficiency - Offers

Who needs more than 1kWp anyway?

If such a system constantly operates at 1/3 of its capacity, it covers the entire demand of our base load, and we are not economical when it comes to standby, refrigerator, and continuous consumers.

Exactly right. That’s how it would be for us. I currently have about 260W base load, with a new refrigerator about 220W, with a new freezer added 200W. Nothing more can be done except turning off the main fuse.......

Or router, NAS, TV, multiswitch, cable amplifier, thermostats, etc... turn everything off.

Or router, NAS, TV, multiswitch, cable amplifier, thermostats, etc... turn everything off.

Exactly. Going through the points, you know where >= 50% of the base load comes from......lol. I've done all that....because at first I thought: That can't be. But it is. Every little bit counts.

Here I can really only optimize the fridge/freezer. After that, I've "optimized myself to death." As of today, there's no more to do........except switch off. But I still want to live here, not just vegetate.

Exactly, either you pull through and turn everything off, or you have to live with the fact that 50% of electricity consumption goes to the base load. 250W makes 6kW per day. For that, such a permanently slow but continuously turning wind turbine would be ideal.

I would recommend that you consult a good planner. I have also been dealing with the topic for some time now. I have already attended various lectures on wind power and all I have learned is that it is not worthwhile. The pure investment for the wind turbine is not the end of it. There are a few more components involved before the electricity flows into the grid, and it is exactly these that make small wind turbines uneconomical ;)

We will install a large solar thermal system and a 5,000-liter buffer tank during our construction. This should cover the summer period. In the cold months, I will heat with firewood (wood is "available"). This way, I am relatively self-sufficient when it comes to heating.
For electricity consumption, a 10 kWp photovoltaic system will be installed on the roof. We will currently not install a power storage yet but will prepare for it. I hope to become relatively self-sufficient this way.

We will install a large solar thermal system and a 5,000-liter buffer tank in our building. That should cover the summer months. During the cold months, I will heat with firewood (wood is "available"). So in terms of heating, I am definitely relatively self-sufficient. For electricity consumption, a 10 kWp photovoltaic system will be installed on the roof. We will currently not install a power storage system but will prepare for it. I hope to become relatively self-sufficient that way.

Very nice post from you.

I think: Self-sufficiency is - as of today - never really worthwhile. It is a passion of some "crackpots" (I am slowly counting myself among them), not a business. People who do this bear the costs themselves that would otherwise be borne by the public.

That’s why I find the wind turbine charming. Costs aside for now. It’s only about self-sufficiency, we don’t sugarcoat the calculation, better we don’t calculate at all (otherwise I wouldn’t have a photovoltaic system with battery either).

As we wrote above (f-pNo / me): Base load coverage. When I look at the radiation curves from November onwards, it turns really bleak for photovoltaics. No matter how big the battery is (apart from the fact that in my micro-house with micro utility room I cannot fit a bigger one than the one I have). Real winter, the large battery will never be full enough, you have to recharge from the grid (= nonsense).

Just out of interest: The 5,000-liter tank is a unit.... wow... Where did you hide it? How is it insulated? What are the daily heat losses (even my small 300-liter storage tank of good quality in the house needs 2.7 kWh/day of maintenance energy at 50 degrees average (= loss)). How big is your solar thermal system supposed to be? What collectors?

A 10 kWp photovoltaic system without storage. That is generously sized. You won’t get much out of the feed-in tariff. Are you sure the sizing is right? For a single-family house, usually 5-7 kWp is enough, especially with south facing orientation. I almost suspect you want to attach a 10 kWh + x battery later, then that makes more sense......

Best regards
Thorsten