The deltrol model 375s work well. Send me a request offline and I can send you a spec sheet.
Steve Higgins Technical Services Manager M: +1.206.790.5840 F: +1.902.597.8447 Surrette Battery Company Exclusive manufacturer of [cid:rolls3c17ab]<http://www.rollsbattery.com> From: Ray Walters Sent: Wednesday, July 31, 2013 12:55 PM To: RE-wrenches Reply To: RE-wrenches Subject: Re: [RE-wrenches] Outback AC coupling Sunpower? Corey; Would you mind sharing what relay didn't work, and which ones did, along with inverter output current? Since the relays will be running for hours at inverter rated output, my thinking would be to oversize the relay by at least a factor of three. I might try Outback's relay/ breaker ( ROCB) if possible. Thanks again for sharing, R.Ray Walters CTO, Solarray, Inc Nabcep Certified PV Installer, Licensed Master Electrician Solar Design Engineer 303 505-8760 On 7/31/2013 12:24 PM, Corey Shalanski wrote: Mac, We have installed about ten AC coupled Magnum systems over the past year. Overcharge protection is accomplished by frequency shift, but Magnum recommends an auxiliary form of battery management. The cheapest way to do this is to program the relay driver on the Magnum advanced remote control (ARC) to open/close a solid state relay at specified battery voltage setpoints - similar to what Kelly mentioned. Unfortunately the "cheapest way" sometimes comes back to haunt us in the form of unanticipated extra costs. We had two customer callbacks indicating their inverter had mysteriously shut down - site visit revealed a fried relay in each case.. so I would recommend at least investing in a good quality relay if you choose this route. One other thing we have learned is that not all grid interactive inverters are compatible with the Magnum inverters. Specifically Power One Aurora string inverters cannot seem to synchronize in off-grid mode - we have had to switch out Auroras on two projects because of this. We have had no such synchronization issues with SMA inverters so far. -- Corey Shalanski Joule Energy New Orleans, LA On Wed, Jul 31, 2013 Mac Lewis <[email protected]<mailto:[email protected]>> wrote: Here is a paper on AC coupling the magnum. http://www.wholesalesolar.com/pdf.folder/inverter%20pdf%20folder/MagnumACcoupling.pdf The key is to connect the AC input terminals on the Magnum to the main panel (or a panel closer to the utility feed) and then feed the utility interactive inverter to a subpanel that is connected to the AC output terminals on the Magnum. Under normal operation, the Magnum passes the power through and the utility interactive inverter is connected to the grid. If the grid goes down, the internal relays isolate the Magnum and the critical load panel from the grid and the Magnum starts to make a sine wave that the UI inverter will export power to. You have to keep the critical load panel amperage below the pass through rating on the internal relays on the Magnum, and the grid connected inverter needs to have a lower output than the Magnum (I think by 10%). Also, I'm not sure if the diversion controller Magnum has been working on is out yet or not. I've never done this, but I am about to. Any wrenches have experience doing an AC coupled magnum? _______________________________________________ List sponsored by Home Power magazine List Address: [email protected]<mailto:[email protected]> Change email address & 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<http://www.re-wrenches.org/etiquette.htm> Check out participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org> This email and its attachments have been scanned by iConnection E-Mail Firewall for viruses, spam, and malicious content. The information transmitted in this email is intended only for the entity or person to which it is addressed and may contain confidential/privileged material. If you received this in error, please contact the sender and delete the material from any computer. Any review, retransmission, dissemination, or other use of this information by persons or entities other than the intended recipient is strictly prohibited. %^^%
<<inline: rolls3c17ab>>
_______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Change email address & 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
