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post #12 of Old 11-09-2013
Maine Sail
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Re: PHOCOS solar charger experiences?

Originally Posted by mitiempo View Post
Positive ground solar installations can and are used on some boats. One point is to make sure the panels are isolated from any metal part of the boat. This can be accomplished with inert (plastic or grp) blocks between mounting points. Here is a link to a pdf regarding positive ground wiring rfrom Morningstar.

Steve Dashew's installation on Windhorse is positive ground. Here is a link to an explanation of his system, with comments.
SetSail» Blog Archive » Sunpower 320 Solar Panels ? Real World Output Data
This is why above I specifically stated "or SunPower panels".... SunPower panels, and a number of others intended for grid tie, are positive ground but to use them on a boat you really need to bypass that by not wiring in the positive ground and you then need to isolate them as Steve has done.. SunPower brand panels are not sold to off grid application so Steve obviously had some connections to get them...

Positive ground systems are more related to grid tie systems and high voltage panel configurations... Some controllers will allow it to be re-configured for positive ground & negative ground but some won't/can't.
I do not have the manual for that Phocos so can't say for sure...

On boats we are negative grounded...

-Maine Sail / CS-36T

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