Solar and battery storage compliment one another very well, so many people find that it makes sense to install battery backup at the time they are having solar installed.
Solar can be installed without also installing battery backup. Alternatively, you can install battery backup without installing solar.
You can install solar now and install battery backup at a later time. Just let your installer know so that your system can be engineered to easily accommodate the battery when you are ready.
If you’ve had solar for some time and would like to add a battery, your system can be retrofitted to receive the benefits of battery storage.