no, it isn’t. A lot of systems still run power through the battery even after it’s charged. The battery ends up in a state of constant trickle charging.

In the deck, once the battery is charged, and the power cable is connected, the battery is bypassed and effectively disconnected.

And the deck only charges to 100% if it was below 90 to begin with.

leaving it plugged in is perfectly fine, once the battery fills up, it is bypassed and the deck is powered directly off of the wire

re the shunt: yes it does