If I want home backup from my EV, what does that cost?

If you want home backup during grid shutdowns, you’ll need to additionally purchase from Wallbox a Power Recovery Unit (PRU), which costs an additional ~$3K. This device activates and deactivates “island” mode, allowing your Quasar 2 to direct power from your EV to your home for up to a few days without sending any power back to the grid. It costs an additional $2K-$3K to install.