Can I use a capacitor in my boat?

Slingshot 07-06-2009, 3:39 PM

I heard that if you use a stereo capacitor in a boat, they won't last very long because the boat is grounded only to the battery. Is this true?

(topside_marine)

I don't believe that would be supported by current electrical theory since the definition of ground means that you ultimately have to come back to the battery to complete the circuit.

(murphy_smith) · (murphy_smith) **Join Date: Dec 2005** 07-06-2009, 4:19 PM

Not sure, but that does not sound right.

Why do you want to add a capacitor?

(wakeboardin2k4)

Well the battery is grounded to the block. Which is of equal ground strength as anything in your car.

(jonyb) · (jonyb) **Join Date: Nov 2008** 07-06-2009, 7:15 PM

A capacitor is pretty worthless in a boat IMO.

(mikeski) · (mikeski) **Join Date: Aug 2003** 07-06-2009, 10:41 PM

It really depends on the wiring and the batteries. If your sub amp is trying to pull more than these systems are capable of delivering instantaneously then a cap will help. If not, then it is a waste of money. Many car wiring systems suffer from such deficiencies that's why they are popular in cars.

(wakebrdr38) · (wakebrdr38) **Join Date: Sep 2006** 07-07-2009, 7:34 AM

mine went out before I ever got to use the damn thing. Condensation formed one morning on it, and that was that.

(david_e_m) · (david_e_m) **Join Date: Jul 2008** 07-07-2009, 10:16 AM

Kyle,

Since a capacitor only provides instantaneous reserves to meet peak transients, I've always considered it to be of some esoteric value only in systems where the voltage is good. In a boat where you're often running below an optimum voltage, especially when at rest, I don't see a real benefit.

David
Earmark Marine