William,

I stand corrected. Thank you. 

This is not a supply side tap. I should have said it was a tap on the supply
side of the panelboard main breaker. That said , I think it works and meets
code, provided the conductors spliced to the feeder are properly sized. The
panelboard busbar is protected by it's main breaker and cannot be overloaded by
the solar contributuion. 

On your other point, Milbank makes a 200 amp MMC that that can be retrofitted
with a 100 amp breaker. I have done this twice, but not because of a solar
install. We've had a couple 100 Amp, 300', underground service laterals that
required oversized conductors because of voltage drop. The Milbank 100 Amp
equipment is physically too small to do this. In both cases we replaced the very
expensive 200 amp breaker with an also very expensive 100 amp breaker, all by
Milbank and labeled as such. I was told by my supplier it was impossible to
purchase a 200 amp Milbank MMC with the 100 A breaker preinstalled. The 100 A
breaker is the same physical size as the 200 and fits right in, no modifications
required. I have two 200 amp Milbank breakers on my shelf if you need them. The
MMC units are very expensive to begin with. Here in VT / NH a basic meter only
enclosure is more often pared with a separate disconnect enclosure through an
offset or straight nipple. This combination might work for you, substituting a
load center for the disconnect.

Dick Ratico
Solarwind Electric

--- You wrote:
Dick:

I disagree with your plan.  To qualify as a supply side tap, the tap needs 
to be on the supply side of the main disconnecting means,  If I understand 
your plan correctly, your suggestion does not achieve this.
--- end of quote ---

