We have developed some off grid 12/24/48 Vdc and dc/120Vac systems for
use in aquaculture that are basically in the tidal of estuaries, far
from shore. We have attempted to create a earth coupled ground by
grounding the system to copper conductors looped in the salt water.
On 8/9/2011 8:40 AM, Dave Click wrote:
Per 690.41 you probably wouldn't need to ground it for a system like
this, but I like the idea of dropping a ground rod down into the
water. Then curve the end and find a big worm, of course.
**
690.41 System Grounding. For a photovoltaic power source, one
conductor of a 2-wire system with a photovoltaic system voltage over
50 volts and the reference (center tap) conductor of a bipolar system
shall be solidly grounded or shall use other methods that accomplish
equivalent system protection in accordance with 250.4(A) and that
utilize equipment listed and identified for the use.
**
On 2011/8/9 8:34, Drake wrote:
That is an amusing concept, and it sounds like a fun project. Why not
poke a hole in the ice and drop the rod in the water? If the water is
not too deep, send it to the bottom. It certainly will be below the
permanent moisture level!
At 01:34 AM 8/9/2011, you wrote:
Sounds like a silly question but is there any way to ground a small
battery based PV system serving a temporary fishing shack on the
middle of a frozen lake? Around here they call these 8' x 8' (or
larger) shacks "ice houses". One or more holes are augered through the
ice for fishing lines. Some of the shacks get remarkably fancy, almost
luxurious (in a guy kind of way). There is usually plenty of beer and
snacks. Sometimes fish, too. The shacks get set in place as soon as
the ice is solid (4-6" thick) and they may stay there for several
months. It's a home away from home for a lot of upper midwest folks in
the winter. Some like the idea of a small solar powered battery system
for light, CD player, TV, etc. There's no earth around for hundreds of
yards, even miles.
Charlie Pickard
Aladdin Solar
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