Jeff, excellent advice. Even seasoned electricians are negligent in this area.
We've done lots of large commercial electrical installations over the years and
a rule that was strictly enforced over the years in our shop was to stand to
the
side and look to the side when operating breakers. On
We recommend making a Pi filter consisting of a 50 uH 30 amp medium Q
coil and .1uF 100+ volt disc capacitors. Insert the Pi filter in the PV+
line. Wire with short direct leads to the control. Helps a lot. Not perfect.
Frank Lewon
BZ Products Inc.
7914 Gravois Road
St. Louis MO 63123 USA
Hi all, thanks so much. I did do dilignece and checked it out. I thank you so
much for the suggestions, I do not want to hear from this roof again, so I
looked at it all.
Here is my conclusions:
When the array was installed, the first row was set, the next row was set on
top touching the
Hi Glenn,
Sure, except for morning net operations right when the controllers are
starting up. Or, daytime on 20 meters for DX operations. Or for weak
signal work or daytime AM radio listeners...and so on. Point is to
find an alternative to the noise.
Dan,
Thanks for the suggestions. The
About a year and a half ago we did a few installations on flat concrete tile
roofs. We used both the GE product and the Sharp product. We liked the Sharp
product a little better.
We are now being asked to begin working with a client who is about 6 months
away from new construction and is looking
About a year and a half ago we did a few installations on flat concrete tile
roofs. We used both the GE product and the Sharp product. We liked the Sharp
product a little better.
We are now being asked to begin working with a client who is about 6 months
away from new construction and is looking
What is your no. 1 preferred PV module manufacturer and why?
I'm not looking for a dissertation, but a sentence or two.
And while I'm at it, how about inverter manufacturer as well?
I'll tabulate all the answers for those interested.
Thanks,
marco
Hello Frank,
Looks like your low pass design cutoff frequency is below 500 kHz. I
had not thought of this but I'll try it. Do you know where to find the
coil that large?
I would think that just by the nature of their design that an MPPT
controller would have this filtering.
Thanks,
Check with DigiKey or Mouser for a suitable (toroid wound) inductor.
Some times a L filter will work. To make a L filter tightly wrap
20' of insulated #12 Romex on a 1/2 X 12 length of re-bar. Insert in
series with the PV+ line.
Depending on the radio. Some times the internal micro
Oh boy, just when we thought all we had to worry about was getting electrocuted
or falling off a roof.
The cooked dummy at the end of the last video is a very serious reminder.
Besides the arc flash gear, are there other things we should be watching for to
prevent this from happening? (we
I am concerned with Delta LA 600VDC cans being mounted exterior from J-boxes
(or disconnect switches) on ground mounts.
I remember hearing from an old hand that these devices can fail in a manner
that could possibly expose the wiring to human hands. The wires would have
high voltage DC
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