Battery Backup for house

I am hoping to purchase 2 EP500 to connect to the service panel for battery backup. Possible purchase 4 units, if they all can be connected. I would love to have someone from the company detail what is all possible with this product. The EP500 seems to be quite a powerful product that is capable of doing a lot more than the simple reviews have pointed out. Before I commit to purchase, there are a few things I need to know:

  • Would I need 2 split phase fusion boxes for 4 units?

  • Is it necessary to use Bluetti EP500 UPS Box?

  • Wouldn’t it be more convenient to direct wire the units for charging purposes?