This article seems to imply that you can share Force Charges between different upgrade cards:

https://www.fantasyflightgames.com/en/news/2018/10/8/a-new-order/

Even though you cannot do this with other non-Force Upgrade Charges and even though the Rule Book says to treat Force like other Charges?

Treat force like other charges. Except for the bits that aren't.

The force rating is for the ship not for the upgrades.

From the RRG:

Quote

• If an upgrade card has a Force capacity, this increases the Force capacity of the ship. The are placed above the ship card it is attached to (not the upgrade card).
  • During the End Phase, each ship with a Force capacity recovers only one regardless of the number of recurring charge symbols that appear on its upgrade cards.
  • If an upgrade card instructs the ship to spend Force , those Force are spent from the ship card.

Oh right it’s in the RRG, didn’t see it in the base rule book. Thanks! Still somewhat new to this.