Rick:
Two questions:
1. If you don’t have PV on this system, what are those glassy, flat
things on the roof wired to the DC inputs of your Sunny Boy?
2. Think to yourself: What component(s) on this project could possibly
produce high voltage DC?
I think the answer to both questions
William,
There’s no PV on this system. It’s AC coupled to an SMA SB5.0.
As a test, we turned off the Grid input, Load output, and turned off the
battery breaker. As expected, the high voltage DC eventually bled to 0V.
Turning things on in this order: Battery, Grid, then Load resulted in the hi
I am happy to report that these issues are resolved, and the system is
operating normally after replacing the broken MC4 and re-pulling wire for
the home run of the faulted string.
That second issue emanated from my guys pulling wire through a conduit
underground that evidently had some rocks in i
Rick:
If I had to guess I’d say you have a PV wiring fault. The PV positive may
be shorted to ground.
This would make the inverter chassis negative in relation to ground.
The logic I use is to ask what is the likely source of DC at 195 volts? It
is most likely the PV circuits, wouldn’t you
Back on the Sol-Ark topic again. We have a customer whose 12kW is measuring
-195VDC to ground from L1 and L2 with the Gen breaker open. L1 to L2 = 0V. I
know the Gen input can be configured as an output, but reading a high DC
voltage to ground is concerning. The generator has never been run. Sys
I like the idea of an ATS, but the customer would need to choose (in this
case) whether they want the house to go dark or to burn through 2000
gallons of propane if left unattended. When you have to barge out a propane
truck to refill, the economics change.
You would not even need an ATS if the So
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