Yes, you can typically add battery storage to your commercial solar system at a later time, even if you don't initially include it in your installation. However, it's generally more cost-effective to integrate battery storage during the initial installation, as it allows for a more streamlined design and installation process. If you're considering battery storage in the future, discuss this with your solar installer during the initial consultation and system design phase. They can design your system to accommodate future battery integration, making the addition of batteries smoother and potentially less expensive.