Wayne,
I have successfully repaired Evergreen EC110's with the potted J-Box by
whittling out the potting material (which fortunately was clear) around the
diode and soldering in new ones. We just repaired 4 for a customer.
Tedious but worth the effort. All 4 were repaired in a little over an
Hi Guys,
The high current can be in the form of higher irradience, not the current
in the lightning. That can destroy the diodes.
you should be able to test on the module side of the diodes to see if there
is voltage on the cell side.
And that will tell you if its worth trying to replace the
Wayne,
Never had an entire array fried. My experience consists of a total of less than
10 modules out of a total of maybe 50 at two different sites. One site had the
much more common (these days) modules with leads and diodes potted in an
epoxy-like material. We use a Dremel tool with a burr bit
Wayne, et al:
I also recommend that you perform a Megger test on the DC Source Circuit
conductors before recommissioning the system. There could be wiring
faults caused by the lightning strike that may go undetected.
It's also possible that an undetected ground fault might have occurred
Hi Wayne,
Several years back I had all sixteen SolarWorld modules on a tracker get
zapped. The two other trackers adjacent to this one had no damaged
modules. The same strike blew out the phone box at the end of the road
(some distance away).
The SolarWorld jboxes were all sealed with no way
but under a surge like a lightning strike wouldn't the diodes open rather than
short?
i always considered the pv's to be the least likely thing to be damaged from
lightning and inverters and charge controllers (electronics) to be the most
vulnerable. what in a pv would fail? an intercell
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