Photovoltaic system – is it worth it?

If the investment does not cost you vital liquidity, just do it.

If your figures for subsidies and feed-in tariffs are correct, then photovoltaics definitely pay off, unless you buy them at the pharmacy. And liquidity is available at the bank. Even then, photovoltaics are better than no photovoltaics. At €1000/kWp after deducting the subsidy, you get electricity generation costs of about 5 ct/kWh. That would even be covered by the feed-in tariff. Of course, additional costs for insurance, etc., apply. However, these should not amount to more than 2 ct. If the feed-in tariff is really that high, then a battery is (still) not profitable. I would wait until prices fall and retrofit later. Greetings Nika

The public power grid is the best battery.

The public power grid is the best battery.

With correspondingly high storage costs = network usage costs - feed-in tariff

Since the companies are operating at full capacity, photovoltaic is currently very expensive for us.

With correspondingly high storage costs = grid purchase costs - feed-in tariff

The costs are significantly lower than with an own storage system. Electricity from own storage costs >30 cents. In addition, the public grid is never empty, especially not in the sun-poor season. In that case, the own storage just sits empty and consumes electricity for its own operation and maintenance charging.

The costs are significantly lower than with an own storage. Electricity from own storage costs >30 cents.

I agree with the first sentence in the case of Germany. The storage costs of >30ct/kWh were correct about 2 years ago. That’s when I bought my storage and it was about 31ct/kWh. Nowadays you can implement storage for under 25ct/kWh. With corresponding demand and design, I have already seen offers for under 20ct/kWh. In 5-7 years, storage will almost certainly be cheaper than feed-in and repurchase without the Renewable Energy Act. Regards Nika