Two Sunny 1800's [RE-wrenches]

[Allan Sindelar]

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*Answers scattered with questions here, Nick...
----- Original Message ----- 
From: "Nick Lucchese" <nickl at sierrasolar.com>
Greetings Fellow Wrenches,
   I have installed a couple dozen Sunny Boy 2500's but next week will
be my first time installing two 1800's. Wondering why I can't install
them without a subpanel.
*You don't need a subpanel.

  The obvious plan is to run each inverter's 120v hot leg through each
pole of a 30 amp 240v AC disco and then on to the double pole 30 amp
intertie breaker.
*Use two single pole 20A breakers in your existing load center, on opposite
AC legs. Then each inverter is controlled separately.

Since each inverter would be running through it's
own pole in a single breaker it should suffice 690-64 right?
*Yes, down to a 100A service panel if it's a residence.

All without paralleling any wires, in one disconnect and one breaker.
Any thoughts on why i can't do this or issues I'm overlooking? I
can't see the need to involve an extra subpanel and if i did go the
subpanel route it pushes me up to a 60 amp AC disco (not that big of
a deal but an extra $20 above the 30 amp version).
*Not sure why you'd need 60A.

In the end it
would save the customer about $200, less equipment on the side of the
house and distribute the power to the service more equally.

  Also, anyone have a good resource for conduit clamps to mount strut
to a 6.625" OD pole? Our usual electrical supply says they are made
to order and won't be available till January. I've tried the threaded
rod technique but not very fond of it. I believe Cooper's part # is
B2020 but not sure where to purchase them (except the local month and
a half wait option).
*Try a plumbing supplier if your electrical supplier can't supply.

As always thanks for your time,
Nick A Lucchese
*You're welcome.
Allan @ +NRG

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