Balcony power plant – with storage or without? Orientation?

I wouldn’t sign these rules as they are.
They may apply to "many" projects, but every installation should still be considered based on the circumstances and requirements.

[*]Photovoltaics: As large as possible, all directions

What use is it to you if you have 30 kWp on the roof but only an electricity demand of about 2,500 kWh per year?
And why should I fill my north side with a 45° roof pitch?

In my opinion, both don’t make sense.

[*]Storage: none

That also depends on many factors.
What did the storage cost?
How many cycles can it handle per year?
How high is my consumption?

Our storage, for example, cost €6,000 and has saved us exactly €3,000 after 5 years.
After 10 years, it will have paid off.

And I have many in my circle of acquaintances where it looks similar and where the storage is also expected to pay off.

Hello,

it is always an individual calculation, the exception proves the rule – and of course everyone has to justify their decision to themselves. However, the most expensive electricity is still by far the one from the storage. It is more expensive than grid consumption. That might change in the near future if storage becomes cheaper. However, if the government unexpectedly reconsiders and dismantles the nonsensical energy transition to allow electricity prices without the green ideologue surcharge, things could turn out even worse for storage.

If a storage costs 6000 euros and saves 3000 euros in 5 years, it amortizes after about 10 years. A storage can last that long, but it doesn’t have to.

Why should you fully equip your roof? Because the one-time installation costs occur anyway, almost regardless of the size of the system. And because photovoltaic modules are really cheap now. Of course, a 45° inclined north roof doesn’t make sense, but planning the system according to your own demand makes even less sense. A large system still delivers enough total yield even in poor conditions to cover the base load.

Undeniably, such a storage is a nice toy. It annoys me to produce more than enough electricity during the day but still need to draw from the grid. If you enjoy it and want a nice hobby, go ahead. You can spend a long time intensively maximizing self-consumption. Photovoltaics and smart home are the new model railways.

Best regards