Re: [electricboats] Floating PV Hazard Potential?

This is a worst case scenario. Beware of other unrelated minor issues that can become a major player.  Consider what happens when you lose the negative connection. You will have a power source in an electrolyte with one lead connected to the boat. Every electron leaving the power source must return to the source. You have now likely forced the electrons to return through the electrolyte This is not easy to analyze. The return path will most certainly involve the underwater metals. Every electron returning through the underwater metals is equivalent to an ion of metal going into the water. Thus you have created perfect conditions for stray current corrosion. If the conditions are just right, the metals can dissolve rapidly as in weeks if not faster.  I have seen many seemingly unrelated faults combine to create disaster. Improper wiring is at the top of the list.  

-----Original Message-----
From: sw via groups.io <v1opps=yahoo.com@groups.io>
To: electricboats@groups.io
Sent: Sun, Aug 7, 2022 8:36 am
Subject: Re: [electricboats] Floating PV Hazard Potential?

How did your hook up your mppt?

When I looked at my motor (mini kota 4hp it says)

Seems to have two red and two black wires that use to go to the old throttle 

Someone else took it apart….

Cheers

On Sunday, August 7, 2022, 08:13:14 AM PDT, cpcanoesailor via groups.io <cpcanoesailor=yahoo.ca@groups.io> wrote:

Also - carefully check the specs of your MPPT controller:  If there is a short or open circuit from the panel, will the controller protect your batteries? Could it harm the controller?

I added a second flexible panel to my little tri. That panel is exposed, like the first one, but its charge controller sits in a sealed, clear plastic case (the kind for protecting GPSs and phones) on the trampoline. The panel is permanently connected to the controller, and then the connection to the battery has a plug, but is located in a sheltered spot inside the hull.