The ABYC says to bond. 11.5.3.3, .1, .2. Bonding of the AC grounding conductor and the DC negative conductor will reduce stray
current. It is also a
safety issue. If an AC hot should contact a DC wire it will go to earth and trip your main breaker. If you are having zinc problems it is not because the systems are bonded. I would add the dynaplate to the bonding system as it will corrode just like a prop or
thru hull. I'll be back tomorrow for the argument!!