by gofast24 » Fri Jul 06, 2018 11:05 am
The answer is yes, they do. After wondering about this for about 3 years finally determined last Sunday that both propulsion engine alternators do charge the house battery! Simple test, turn off house battery charger at dock (on shore power), put a some DC load on the house battery (fridge, stereo) for 5 minutes, check house battery voltage on a Blue Seas OLED voltmeter at helm (12.6 VDC), start one propulsion engine (voltage went up to about 13.1 VDC), shut that engine off, start other engine, and same results (13.3 VDC). Now the real question= Since we replaced a group 8D flooded battery with a 8D AGM house battery we changed the switch on the back of the Charles House battery charger from Flooded (wet) to the AGM position. But dont know what effect the propulsion engines alternators , not being adjustable from flooded to AGM, will have on the house battery? Both propulsion engines are also on group 27 AGM batteries as well, but in 3 years, no problems with any of the starting or house batteries? All this just FYI or any comments?
gofast24
2001 Regal 4160
Twin VP 8.1GSiI V Drive Inboards
Lake Lanier, GA