I think that the calculation goes as follows:
(1) For residential PV systems, the bus can fed at 120% of its rated value: 1.2*225A=270A (2) The main breaker limits the feed from the utility to 200A (3) This leaves 70A for the PV system - Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 CA Lic. 854779, NABCEP Cert. 031806-26 [EMAIL PROTECTED] _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Christopher Freitas Sent: Thursday, December 04, 2008 2:51 PM To: RE-wrenches Subject: Re: [RE-wrenches] Square D 225A load center Ahhh - I think I get it - you get the 20% of the 200 amps (so 40 amps) + the extra 25 amps because the buss is only running at 200 amps? I just saw you emailed me. Christopher Christopher Freitas Director of Research and Development OutBack Power Systems, Inc. <mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED] Tel 360 435 6030 Cell 360 202 4239 19009 62nd Ave NE Arlington WA 98223 USA <http://www.outbackpower.com/> www.outbackpower.com _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Brearley Sent: Thursday, December 04, 2008 11:41 AM To: RE-wrenches Subject: Re: [RE-wrenches] Square D 225A load center It has an option for a factory-installed 200A main breaker. On 12/4/08 12:31 PM, "Christopher Freitas" <[EMAIL PROTECTED]> wrote: How does the 225 amp rating make it ideal for 60 amp breakers? 20% of 225 amps is 45 amps - and even with "rounding up" it only gets you to 50 amps. Christopher Christopher Freitas Director of Research and Development OutBack Power Systems, Inc. [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> <mailto:[EMAIL PROTECTED]> Tel 360 435 6030 Cell 360 202 4239 19009 62nd Ave NE Arlington WA 98223 USA www.outbackpower.com <http://www.outbackpower.com/> <http://www.outbackpower.com/> _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> On Behalf Of Andrew Truitt Sent: Thursday, December 04, 2008 8:33 AM To: RE-wrenches Subject: [RE-wrenches] Square D 225A load center Greetings all! I heard that Square D makes a load center with a 225A buss bar and a 200A main breaker - ideal for installing 60A of solar interconnection breakers. Does anyone have a part number (or any other info) on this item? Thanks! Andrew Truitt Standard Solar MESSAGE CONFIDENTIALITY NOTICE: This message (including attachments) is covered by the Electronic Communication Privacy Act, 18 U.S.C. sections 2510-2521, is confidential, and may also be protected by attorney-client or other privilege. If you believe that it has been sent to you in error, please do not read it. If you are not the intended recipient,you are hereby notified that any retention, dissemination, distribution, or copying of this communication is strictly prohibited. Please reply to the sender that you have received the message in error, then delete it. Thank you.
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