ᐅ Balcony Solar System – With or Without Battery Storage? Orientation?

SteffenBank schrieb:

That can't happen since the modules are connected to the battery storage, and the battery storage is connected to the inverter.

That makes sense if the battery unit has the trackers.
This way, you have a maximum charging power determined by the modules and a maximum discharging power controlled by the inverter, allowing you to effectively influence the number of cycles and thus the profitability, since the modules themselves are comparatively inexpensive. That seems reasonable.

Musketier schrieb:

I assume, like us, you have a large system on the roof.

Bigger than a balcony: yes; roof: yes. Large with 9.99kWp: no.

Musketier schrieb:

If you regularly come home in the evening and fully drain the fully charged battery, the number of cycles would increase as a result.

Here, the need for recharging and the battery size matter. If the car drains the battery and then you have to buy electricity for the base load, nothing is gained.
Specifically for us: we have an 8kWh (8kWh) battery with 8kW (8kW) charge-discharge power. Without a connected car, a full battery in summer is enough to cover the period without solar generation between the last and first sun rays. Any consumption beyond this must be purchased. Whether I buy electricity for the car or the house makes no difference, as overnight it still counts as one cycle. I could consider expanding the battery storage.

Musketier schrieb:

It depends on when charging can take place.

For us: it depends on when charging actually happens. This may sound like a subtle point at first, but it is a fundamental difference. I am not going to start trying to educate others just to save a few dollars on electricity.

With a BKW, I would keep it very simple. Install it, turn it on, and just let it run in the background without much attention.

hanse987 schrieb:

With a BKW, I would keep it very simple. Install it, turn it on, and let it run in the background without much attention.

That's exactly how I did it too.
Although I’ve already wasted 400 kWh since October...
Our consumption is simply too low.

And the 2-4 kWh/day that we still draw from the grid in summer doesn’t make much of a difference.

Neuer von Da schrieb:

Already wasted 400 kWh since October...

At my parents' house, it's about 150 kWh since January. On the shed roof, one module is oriented to the east and one to the west. This results in lower peak yield at midday but a nicer distribution throughout the day.

We have had a balcony solar power system for about a year now, and I have also considered whether a storage battery would be useful. However, I don’t know enough about it.
When the sun is shining and hits the photovoltaic system in the late morning, the electricity is enough for all continuous users plus possibly one additional device... either the dishwasher or washing machine (depending on the stage of the wash or rinse cycle at least) or home office equipment. But as soon as several of these run simultaneously, the photovoltaic system is no longer sufficient.
In the meantime, we have adjusted our routine somewhat so that the washing machine or dishwasher actually runs more during the day instead of in the evening.

Whether adding a battery storage system to a solar inverter is worthwhile or not is something everyone has to decide for themselves. If you only have 2 panels, it usually isn’t worth it if you manage your consumption so that you use the full 800 watts. However, if you have 4 panels and your output is nearly 2 kW, then it does make sense. You can use 800 watts directly and charge the battery with the excess, then use that stored energy when the sun isn’t shining. Of course, how quickly the extra panels plus the storage system pay off is another matter.