Since PMA alternators
are putting out PULSING DC voltage you can use an AC type breaker!
Find these breakers at your local hardware store. Comes with
a nema approved metal box for about $30.00 This can also become
your CUTOFF point in emergencies.
TIP ABOUT USING AC BREAKERS
Even AC breakers have an
internal positive connection PREFERENCE!
HINT: Look at the breaker
switches 'ON' and 'OFF' positions, the POSITIVE wire connection
is always most near the 'ON' position of the switch. By the same
token the NEGATIVE wire connection is the one closest to the
'OFF' position of the breaker switch.