It has been apparent to me that pressure pumps, both for fresh and salt water
were a cause of earth leakage onto the hull, mainly when they were running!
So no more permanently wired pumps of any type!
I never connect to shore power. I have an onboard honda
genset that can work through the shore power inlet to charge the batteries through a 40 amp sterling charger. In, fact, when in a marina I never, ever, connect to the dock
With 3 solar panels
of 170 watts I always have nearly full batteries, the new MPPT
solar tracker regulator
is a wonder! Also, two wind
gennies can be used, but mostly tied off as they are not regulated. With 540 amphour of batteries as well, no need for extra charging
or shore power!
Also, never, ever use a mooring! Always drop the anchor
and dig it in. Had a "new" one fail on me after 3 days in Ao Charong at Phuket, at 3am!!!! Heard many tales of woe about failed moorings!!!
I have a bright red LED light on the fuse panel, one side connected to the positive 12V bus and the other to the hull. If any leakage, it glows brightly. Funnily enough, I wondered why the PO had a double pole switch on the VHF radio
, found out when I installed the LED, it glowed when the VHF
is on, the earth braid is exposed somewhere in the mast
and allows earth leakage to the hull. But, now that the standard horizon AIS
, VHF is wired into the NMEA
bus, the double pole switch does not do any good, even when off, and I have disconnected the shield braid from the coax line, until I replace the antenna
Also, never have the motor
permantly earthed!! I have a big, huge double pole relay, handles 200 amps, for the positive and negative 12V feeds to the starter motor
and glow plugs. Makes a lot of noise
, but only feeds 12V power to the block when glowing the glow plugs and starting the motor with the starter motor!
also has to be electrically isolated from the block with insulated wiring
posts or nylon bushes on the mounts.
Then, no more hull corrosion????
I always leave my yacht on the hardstand
when I am away for 4 to 6 months, and leave the solar panels
Cheers from Keith.