Colleagues:
Not too long ago we finished a large off-grid residential power system
installation. It has a three-stack Radian 8048A with three FM80s and about
3,000 AH of battery. The home has all the bells and whistles including VFD
drive pool pumps and home automation.
We have been experie
William
Just so it is clear, the outback on the DC side GFI is .5 amp not a 1. amp
Jerry
On Tue, Jan 21, 2020, 6:41 AM William Miller
wrote:
> Colleagues:
>
>
>
> Not too long ago we finished a large off-grid residential power system
> installation. It has a three-stack Radian 8048A with three
Hi Jason -
It certainly appears that there was some sort of surge or short. We've had
a few cases where microinverter branch circuit end termination caps were
left off or fell off and shorted out during rain storms. You might want to
double check that those are all in place. We've also had cases w
Hi Jason,
I have had an experience servicing other's arrays where they used PVC on
the roof. The LB cover does not hold up over time and then water and snow
were getting into the conduit, which came straight down into the top of
that same kind of Eaton panel. Corrosion caused at least one breaker i
Jason,
Have you calculated your back-fed amapacity allowance to confirm it
complies with the 120% busbar rule as per 705.12?
Best,
Chris
On Tue, Jan 21, 2020 at 12:40 PM August Goers wrote:
> Hi Jason -
>
> It certainly appears that there was some sort of surge or short. We've had
> a few case
Yes - It's only 56A total inverter output rating on a 125A bus. Max string
is 13A inverter output rating on 20A OCPD.
On Tue, Jan 21, 2020 at 12:58 PM Chris Sparadeo
wrote:
> Jason,
>
> Have you calculated your back-fed amapacity allowance to confirm it
> complies with the 120% busbar rule a
I just remembered this... There was a tripping breaker here almost
immediately after installation. We investigated the string and found no
issues, including checking the termination cap (on all strings). We reset
the breaker a few times and it would run for days without issue, then trip.
Then we we
Wrenches
Cant tell anymore but l had a buss failure due to water getting on buss and
pealing the tin off the buss and the aluminum base will light up real quick.
Jerry
On Tue, Jan 21, 2020, 9:10 AM Jason Szumlanski <
ja...@floridasolardesigngroup.com> wrote:
> (System installed by another contrac
Almost every meltdown I've looked at was not due to lightning, but heat
from a high resistance connection. A lug not torqued can cause
surrounding plastic to melt. If the wrong breakers are used with the
buss bar, they might snap on and work, but not be able to take the
current over time. Co
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