Photovoltaic Battery Storage - Market Check Fire Hazard

So today I had a yield of 6 kWh from my 7 kWp system. My daily consumption today including hot water generation is 9 kWh. Self-consumption 99 percent. Grid supply 3 kWh.

Therefore, I am a bit surprised when a 28 kWp system only produces 4.5 kWh.

From 01.01.2023, EnviaM will increase the basic supplier tariff from currently 28.85 to then 48.06 cents for electricity. More than 66 percent price increase.
Every storage system and every kWh that you can consume with photovoltaics pays off.

With my 5000 kWh consumption per year, that would be just under 2800 euros in electricity costs annually. With my photovoltaic system, it will perhaps only be 500 euros. The system with storage would then have paid for itself after 5 years, instead of the planned 10 years.

Why Should we? The battery doesn’t generate heat …

Seriously? Every battery I know gets warm when it is charged or discharged heavily. And they become less efficient when they get very warm.

From that perspective, it surprises me a bit if a 28 kWp system only produces 4.5 kWh.

There is not much to be surprised about with all-day rain and not a single hour of sunshine in November...

Today 29.3 kWh.

Where do you live then? Well, I had sunshine every day in November and therefore also photovoltaic yield. From that perspective, your statement does surprise me a bit. But of course, the sun cannot shine everywhere.

We already have some rainy days here in the Rhine Valley in the southwest in November. Since yesterday, there has been only high fog all day. Today we produced an incredible 3.3 kWh. Which I find quite amazing given the fog. Power just under 10 kWp

Seriously? All batteries I know of get warm when they are charged or discharged heavily. And they become less efficient when they get very warm.

Ok, and what do you do with the battery in the house then? Does it get its own air conditioning?