This is one for all you Electrical
engineers out there.
In my land based life, I maintained and repaired equipment
and as far as I can remember, I never, ever replaced a motor
capacitor. Now that I work
on boats, I have learned that if an AC motor
won't start or won't run the FIRST thing I check is always the capacitor(s). More often than not, that's the issue, the cap is wildly out of label spec.
My question is... is there something about the physical or electrical environment
on a boat
that causes capacitors to die sooner, then they do in a land-based on-grid system?
I can IMAGINE that that's true, but I am hoping somebody has a more concrete answer. Maybe small gensets have distorted waveforms under high load? Or something?
(Let's exempt non-sine wave inverters from the discussion. I certainly can see the sharp corners of a stepped approximation to a sine wave being tough on a capacitor!)