I have dealt with this dozens of times, but it's been a few years. It's my understanding that any of the versions up to 4.1 can be stacked together, but I always upgraded both of there software revs to match. The 4.10 and higher, which require the Grid tie box installed to grid connects, can not be stacked with earlier units. I bet Nick Klein, in tech support at Xantrex could get you the software?
Nick Soleil Project Manager Advanced Alternative Energy Solutions, LLC PO Box 657 Petaluma, CA 94953 Cell: 707-321-2937 Office: 707-789-9537 Fax: 707-769-9037 ________________________________ From: Allan Sindelar <[email protected]> To: RE-wrenches <[email protected]> Sent: Fri, October 30, 2009 6:05:00 PM Subject: [RE-wrenches] SW4024 compatibility question Esteemed Wrenches: Wrench esoterica time… another contest like Mick’s to win the chance to take time off… A customer has a late-2005 SW4024 with Rev. 4.30 firmware. He needs to add a second inverter for series stacking to increase output to run a big well pump. We have an early SW4024 with Rev 1.0 firmware, and we have both Rev. 4.01 and 4.10 firmware chipsets in our parts archives. Are the two inverters compatible if series-stacked with a firmware upgrade? Thank you. Allan Sindelar [email protected] NABCEP Certified Photovoltaic Installer EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.PositiveEnergySolar.com
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