Voltage after a 45min. cruse

[Nauti n Nice]

Hello to all ! Firt time here ! and glad to have found this place !<br /> I due have some questions thoght. <br /> First off , my boat is a 1995 crusers with single volvo penta 454 duelprop . My volt meter on the dash board (house or start gauge ,not sure yet but suspect starting battery gauge ) is showing voltage seems to drop from 14.2 to 10 .7 after crusing at speed for a trip with throtle open , when at idle , the voltage meter shows normal 14.2 as it"s charging . I just noticed this last time out . Both my start Battery and house battery are in good working condition , relitivly new , tested with a load tester . Is it possible the alternator can not keep up ? It should have been sized correct from volvo . I do not cruise using any other draw from the battery . ?

 

[tommays]

Re: Voltage after a 45min. cruse

n<br />if your getting your readings from the guage on the boat they arent realy very good for solveing problems<br /><br />are there any other problems with the electric on the boat<br /><br />the best thing you can due is hook up a real voltage meter to the battery and see what is going on it sounds like the system is keeping the batterys charged and your guage is just jumpy<br /><br />tommays

 

[Nauti n Nice]

Re: Voltage after a 45min. cruse

I am not having a problem , I did notice the volts were down while under way , and come right back when at idle . As if I am using up power faster than making it . I dont recall this before , but I have not gone far for a while . Thanks