Hello
With the growth of the solar industry coupled with the generous incentives now
offered on fed part of the equation, we are seeing some trends here and
wondering what the approach has been in other areas. What kind of feedback are
you receiving from the AHJ?
There are some integrators who now are installing "systems" meaning, multiple
small inverters that are married to smaller arrays as opposed to one large
array with one large inverter.
So, it is quite conceivable to have, for example, 3- 3000 W SMA inverters on a
customers home. So, the point of connection issues arise. When you look at
690.64B, it speaks to the 120% of the busbar rating.
What are folks doing in other areas, for this above example to address the
mechanical/electrical challenges associated with this situation, when if you
had 1- 200 amp residential service? There is alot of discussion, like
installing a 125 amp rated subpanel; interuppting the feeder from the electric
service and installing a 225 amp panel with a higher rated buss (hard to find
or custom made thru Cutler Hammer or others) etc.
We can also see a trend using the enphase products as well, but not as much
pronounced. It could be conceivable for a client to want to build their system
up over a few years and have 15, 175 watt panels on a circuit (2P15 amp) and
grow the system up to lets say, 45, 175 watt panels (3-2P15 amp). Same
situation, different inverter manufacturer. My sense is this trend will
continue for the forseeable future, and alot of wrenches will find orphaned
systems out there and we should look at ways to address point of connection
issues that are bound to present themselves.
Thanks
Keith
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