ᐅ Photovoltaic system on a single-family home

Hello everyone,

I have a few questions regarding photovoltaic systems.

The system we are planning would be commissioned in 2012. The output will be around 8-10 kW, thus falling into the "up to 30 kW" category.

According to the feed-in tariff (Renewable Energy Act 2012), we will receive:

24.43 cents per kWh

and

8.05 cents per kWh for self-consumption, provided that self-consumption does not exceed 30% of the output

and

12.43 cents per kWh for self-consumption, if self-consumption is above 30%.

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Now for the first question:

The feed-in tariff has significantly decreased over the years. Therefore, the part regarding self-consumption is much more interesting to me.

Do I understand correctly that I receive 8.05 or 12.43 cents for every kWh I use myself? If so, can I assume for my calculation that I can use the utility’s electricity price plus the above amounts?

Assumed electricity price from provider: 20 cents per kWh

=> Savings of 20 cents + self-consumption tariff

If this is correct, then I naturally have a greater interest in maximizing my own electricity use.

This probably means I will need batteries.

What would you consider a reasonable battery size?

And is it possible to use the output during the summer months for things like watching TV, etc., so that a high ratio of self-consumption can be achieved during the peak production period?

Thanks a lot for the information and best regards
ostsee