[melenaos]

I want to add some panels at my home to lower the monthly power bill but as I understand I have to direct the energy to something, such as fridge or AC, and when there is not enought energy from the sun either automatically switch to grid or manually.

Where can I find such information to build a hybrid energy solution?

[Faaak]

All grid-tied solar panels (i.e. what you get when you install solar panels at your home) will do that automatically. Don't don't have to do anything.

Solar will be consumed in priority. If there's too much it will be sold and if there's some missing il will be automatically (by the laws of physics) imported from the grid.