There are two systems, the 110 volt and 12 volt. They work in combination to power up your boat. There are 4 ways to get power, let’s keep it simple and go through them.
First is your shore power, this is the electrical box from your dock, just connect the shore cord, one 50 amp or two 39 amp cords. If you do not have air conditioning then one 30 amp will do.
Your boat now has full 110 volt power.
Second is when you disconnect the shore cords and leave the dock. To get full 110 volt power you will turn on your generator and presto 110 volts, I have a 50 amp, 9kw Yanmar Generator, this will work all systems on my boat including the air conditioners.
Third is an inverter, I have a 3,000 watt heart inverter. The inverter extracts 12 voltage from your 12 volt house battery system and inverts the 12 volts to 110 volts. This provides 110 volts throughout your boat except for the air conditioner’s, they draw to much power and you must turn on your generator. The inverter allows you to run all your 110 volts on your boat without running the generator. In the old days you had to turn your generator off and on every time you turned on anything with 110 volts. This was a major breakthrough, you can watch TV without the noise and fuel consumption. The inverter is also a 160 amp battery charging system, whenever you plug into shore power or turn on your generator your batteries will start charging up.
Forth is your alternator, this is the system I have on my trawler. One 50 amp to charge my two high cranking engine batteries (just like in your car). The generator has an alternator so it charges my generator’s batteries. Last but not least, my secondary backup 150 amp alternator is connected to my eight 210 amp hours 6 volt house battery system, this is the power source that let’s you run all your 110 & 12 volt systems on board without the use of your generator. The 150 amp alternator will charge up your house batteries while cruising or at anchor by turning on your engine and running 1500 hundred rpm’s. This was the best money spent on my power system I do not have to keep running my generator to charge my house batteries, I just go cruising and the 150 amp alternator will charge up my system.
Hope you enjoyed this article
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