I need to thank
for his recent thread https://www.sailnet.com/forums/electr...ge-40-amp.html
...... it reminded me that I had been procrastinating installing some gear I had bought to upgrade my charging system a while back (Miami boat show 2014, I think....).
Today I finished installing an Electromaax 120 amp alternator and serpentine belt & pulley kit on my Yanmar 3GM30F, with a Mastervolt Alpha Pro external regulator. I also changed up the charging scheme so that the alternator and my shore power charger both are connected only to the house bank and added an Echo Charger to charge the start battery from the house bank. I kept the old 1-2-Both switch for now, anyway. May change that to three separate on-off switches later when I replace the old 12V house panel.
The installation of the Electromaax alt went very smoothly - I had a couple of questions along the way but got quick and helpful responses from the tech support folks there. The alternator and belt conversion kit seem to be really good quality - a huge upgrade over the old Yanmar Hitachi alternator. I'm not affiliated with Electromaax and don't want this to sound like a commercial for them, but I am a happy customer.
Got out for a test run today everything seems to be working as planned. My house bank is two Duracell 6V golf cart batteries, and I have an Interstate group 31 for a start battery. I noticed about a .5 knot reduction in boat speed at 2800 RPM with the new alternator.
Next steps are to get the software and some cables to be able to program the Mastervolt charge controller, install a Balmar Smart Gauge (another piece of kit from the 2014 Miami boat show, I think), and install 3-195W solar panels and an MPPT charge controller.
Rum, whiskey, and port wine don't need refrigeration, but dadgum it is nice to have cold beer and that just doesn't happen on the hook without well charged batteries!