Construction costs are currently skyrocketing

But apparently the supplier is allowed to adjust the prices at any time unless there is a price guarantee. I just wonder that many write that the price is usually increased after the contract period expires.

Well, for many the price lock will coincide with the contract period. At least it is like that for us.

Well, for many, the price commitment will coincide with the contract period. At least that's how it is for us.

That is actually the usual case. That's how I know it anyway. And after the price commitment, the supplier is free to set prices, even if you have a contract. You can then cancel in the event of an increase.

I don’t understand. If I extend the contract to 01.12., then I have contractual foundations which also include the price. And if the contract period runs for 12 months, then both must adhere to the contractual foundations, right?

Correct.
Your contractual basis is a price guarantee until 31.12.2022. No more but also no less. Or do you have a price guarantee until 31.11.2023? Then that would also be stated in your documents. And if the provider adheres to the contract, they guarantee the price until 31.12.2022 and can then adjust it – if they increase it, you have a right to terminate and can enter into a new contract.

What is also strange is that I concluded a contract last year via CheckXX at 30.54ct and in the app there is an Accesspoint at 26.25ct.

That is not strange, but completely normal. It concerns every electricity provider and every customer. It has become cheaper for all of us since 01.07.2022 (that was the date, if I remember correctly).

When I go to their website, they are currently advertising 66.95ct price per kWh o_O

And this too is an unfortunately normal price by now.

31.11. will definitely be difficult ;)

And this is now (unfortunately) a normal price.

What is expected? Anything over 40 cents can be pocketed directly without losing customers... Some will probably scrap for every cent... Might as well take it.

What is expected? Anything over 40 cents can be pocketed directly without losing customers...

Nevertheless, there will still be enough competition. Because the electricity price brake a) slows down at a high/expensive level and b) only covers 80% of the previous year's consumption. And if I have to pay 125 cents for the remaining 1,500 or more kWh, I strongly consider whether to stay with the provider.