SailNet Community - View Single Post - battery question
View Single Post
  #7  
Old 06-30-2008
sailingdog's Avatar
sailingdog sailingdog is offline
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
I hope, by trickle charger, you mean an intelligent three-stage charger. A 2/10 amp car battery charger will do a pretty good job of frying a deep cycle battery if you're not careful.

The alternator may read as high as 15 volts... depending on the RPM of the engine, the charge level on the battery and whether it is internally or externally regulated. Anything above 14.7 or so is going to boil off electrolyte in the battery if used for an extended period of time. As HS has said, it should read about 14.4-14.6 Volts at cruising speeds.

Quote:
Originally Posted by northstarjim View Post
Thanks guys - I figured as much. Next winter -what should I do? I have both a trickle charger and a regular battery charger - should I just use the regular 10A charger every couple of weeks or so? or keep the trickle charger attached for longer periods?
Also - how exactly do I check the alternator output? Attach the positive lead at the positive terminal of the alternator and the negative to the other/ground terminal? I assume it should read aroung 13 volts?
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook