We are opting more and more for supply side connections in these situations (assuming convincing the customer that an upgrade to a 200A service/panel is not an option). We have yet to run into an AHJ that cannot be made to see this is a good option and we use Ilsco Kup-L-Taps to pierce the main conductors inside the load center, prior to their landing on the main breaker.
-Glenn Burt Alteris Renewables, Inc. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Palumbo Sent: Sunday, October 31, 2010 2:35 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] 3.7kW grid tie AC Point of Connection could be to a backfed 20A DP breaker in the existing GE TM3210CCU load center (100A MB with 100A busbar) if the SMA SB3800 inverter was still available. But a SB4000 requires a 25A breaker which violates the 120% rule with the existing panel. Comments on the options below. #1) Go with another 240v grid tie inverter in the 3800W range, so we can use a 20 Amp breaker. I see PV Powered and Kaco have 3500's listed. Any 3.7, or 3.8kW inverters? #2) Is it possible to either, change out the Main Breaker in the above GE load center to a lower amperage MB, or add a Plug In Breaker. There is a GE "feeder type" breaker # THQL2190 (90 A DP). Could we use this as the main breaker for the load center above? It is listed as a 10KAIC breaker. #3) Swap out existing 32 space load center and replace with 150AML panel with 100A MB kit. Thanks, Dave Palumbo
_______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
