Absolutely not. In Florida, with net metering, the power grid itself acts as your battery. All energy you pull in from the sun gets pushed into the grid. The smart meter your utility installs basically runs both ways and acts like a big power savings account. You push power in which creates a credit. When you use power during the times that your solar system is not producing energy (at night, or an especially cloudy day), you pull from those credits in your “energy savings account” to power your home. We do install battery backup systems for one reason only – storm preparedness. In the event of a major storm that knocks the power grid completely out, you can utilize the stored battery power to run your essential items while the grid is being repaired.