Ryan: Not sure what is in the manual now but... The lugs in the SI 5048U are dual 2/0.
We had to use parallel AWG #1 because we kind of painted ourselves into a corner. The breaker in the SI ended up being 250 Amps, the conduit fitting was only 1.5" and the wire bending space was too small for a 3/0. The only way to get enough Ampacity in a 1.5" conduit and that wire bending space was to go with dual #1's. The 250 Amp breaker was used just to get enough current for the very short duration surges without tripping the breaker (12kW per SI). If not for this a 200 A breaker would have been fine. Note that the actual full power ampacity required for normal operation is 5kW @ 40 Vdc = 125 Amps continuous. It is the high surge loads that require more current. I run mine with a single 2/0 and we have never even come close to hitting full power. Worst case current is typically while charging not when inverting and I set the current limit so that I do not exceed ampacity of 2/0. In my experience it takes >= 14kW generator to drive a pair of SI's to full power while charging Best Regards, John Berdner General Manager, North America SolarEdge Technologies, Inc. 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) T: 510.498.3200, X 747 M: 530.277.4894 -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ryan Sent: Monday, February 04, 2013 11:50 AM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] Sunny Island DC wire size Howie I understand it to be 2/0 now that MidNite has the Epanel released (Or starting to release) for the SI. Ryan On 2/4/2013 2:46 PM, Howie Michaelson wrote: > Hi it has been more than a year since I wired up a Sunny Island 5048 > system and I'm trying to determine lug size for the DC conductors. My > memory is that the maxiumm wire size was (2) #1 conductors each for > positive and negative. Looking in the most recent SI manual states > "The Sunny Island has a MAX DC terminal rated for 2x #2/0 AWG for DC+, > DC- and PE." Not sure if that is a typo - anyone no definitively? > The tech support line has gotten to have as long a hold time as > Outback, Xantrex, etc... > > Thanks, > Howie _______________________________________________ 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 CONFIDENTIALITY NOTICE: This e-mail and its attachments are intended only for the use of the individual or entity who is the intended recipient and may contain information that is privileged, confidential and exempt from disclosure or any type of use under applicable law. If the reader of this e-mail is not the intended recipient, or the employee, agent, or representative responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this e-mail is strictly prohibited. If you have received this e-mail in error, please reply immediately to the sender. P Please think of the environment before printing this email _______________________________________________ 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
