Hi, first the background, I have an old 35ft catamaran
that I am thoroughly refitting including switching from single diesel
with outdrive leg to twin yam 9.9 high thrust outboards. It currently has a Rutland
900i wind generator
and 80w solar
panel going through a marlec pwm controller. Aside from that all the 12v stuff including batteries
is shot so I am pretty much starting from scratch.
will have all led for cabin
and nav lights, iPads for nav and probably an Engel or similar fridge, no freezer
so pretty basic. We want to be self sufficient with no need for shore power
but would add in a portable Honda generator
for longer cruising if required.
first. I am currently thinking 2 or 4 Trojan t105’s for house bank with solar
connected to this bank only, plus 2 small separate motorbike or lawnmower batteries as starter batteries for the outboards. Thinking is that as the outboards only put out 6a charge, each will effectively just keep its own starter battery
charged up and act as a stand-alone system. Is this a good idea or will it waste valuable charge output? What’s a better alternative?
2nd is solar and wind
. I understand mppt
is better than pwm and would like to add more solar than the 160w max that the marlec controller can handle but the Marlec seems to do more with the wind gen than just modulate it’s charge output. Can I just use a completely separate mppt
controller for the solar and connect both controllers to the same battery
bank. Or for that matter can I ditch the marlec and get a different controller that does mppt for both?
Thanks for reading this far, any help greatly appreciated