Thankfully for you, your homes solar system will only operate in one of two ways.
One, your solar system is generating more solar than your household needs/uses. This means that your surplus energy goes back to the grid, and you could get a feed-in tariff, meaning you make money on your solar.
Two, your household is using more energy than your solar system is producing. This means that you will need to purchase additional energy from the grid.
Some ways to mitigate the amount of energy you need to purchase from the grid, is to only use certain appliances like your dish washer and washing machine during the day, when your solar system is generating electricity.