CAN I USE A TESLA POWERWALL WITHOUT ANY SOLAR PANELS?

Certainly! Here’s how it works: when you have Tesla Powerwall backup battery installed in your home WITH solar panels, your solar array will power your home during the day and direct surplus energy to Tesla Powerwall. Tesla Powerwall will discharge when it determines energy is needed most, such as when the sun goes down at night, or during severe weather.
Without solar panels, Tesla Powerwall will charge during times of the day when energy rates are low. This provides you with a surplus of the most affordable energy provided by your power company. Then, the unit will discharge during peak rate hours — so you’re not paying peak energy rates, but instead are using the low-cost energy your Tesla Powerwall stored hours earlier.