View Single Post
Old 02-07-2009, 11:29   #23
CharlieJ
Registered User
 
CharlieJ's Avatar
 
Join Date: Dec 2008
Location: St. Petersburg, FL
Boat: Gulfstar Long Range Trawler; 53'; BearBoat
Posts: 163
Quote:
Originally Posted by captden View Post
The tech note specified a 50 MFD/270 Vac which I assume the 270 vac means 270 volts a.c. If I remember correctly my genset is only 120 volt ac.
50 MFD, 370 Volt, "Run" Capacitor (2-Pack)

Is this the right one? Also it says to connect it between the hot and neutral wires which means across the line side wires at the genset?Captden
The 50 MFD/370 Volt run capacitor will work. You connect it between Hot (Line) and Neutral conductors at the genset, generally inside of the genset's connection box.

Quote:
Originally Posted by captden View Post
I will try that for a temp fix but I think I may be better off putting a 100-200 amp high output alternater on the genset and charge the bank that way like I said eairler I will be doubling my house bank before I go and I would like to keep my charging time to around two hours a day using around 150 amp hrs a day.
OK, but let's do a little more math. Your 5.5 kW genset probably has an 8-10 hp engine (5,500 watts/746 watts/hp = 7.4 hp). The general rule of thumb is that each 25 amp of alternator output requires 1 hp. 100 amp alternator requires approximately 4 hp to run. That leaves 4 to 6 hp remaining to power the generator end of the genset. More importantly, the side load placed on the engine by the alternator may exceed the design specs of the genset.

Be careful.

Charlie
__________________
Charlie Johnson
JTB Marine Corporation
"The Devil is in the details and so is salvation."
CharlieJ is offline   Reply With Quote