Friends:
Some of you may remember the problems I am having integrating a set of Fortress batteries with an off-grid Sunny Island/Sunny Boy ac-coupled system. If not, here <https://millersolar.com/MillerSolar/case_studies/36_SIFortress/36_SunnyIslandFortressIntegration.html> is the case study. The problem has been in abeyance for the last few months because due to short days and cloudy weather. There has not been enough sunshine to cause a recurrence. Now that spring has sprung the problem is back. I did come up with a work-around: I installed a contactor to disconnect the Sunny Boys whenever the SOC gets to 90%. This works but it does waste some solar capability. I have been working with Fortress on the issue. They have been in touch and have been very generous in offering support and spending time trying to find a solution. Most important they have admitted the problem exists. To me this is very refreshing. This makes me want to use more Fortress products and sing their praises. I think my fellow wrenches would want to know about this great support when contemplating which battery products to use, which is the reason for this post. Below is an excerpt from an email received today from Fortress. Hi William, Apologies for the lapse in communication on this subject, we are still actively working on this case to provide you with a solution. We have confirmed here in our Lab that the older firmware does not resolve the issue as you have stated and the engineering and product teams are in discussions to provide a solution to this battery/inverter compatibility issue. We will provide updates on a solution as we receive them. I unfortunately do not have a timeline to provide, but we will have one soon. Thank you for your patience. Warm regards, Galen Gennaria I will update the case study when new developments occur. William Miller Solar 17395 Oak Road, Atascadero, CA 93422 805-438-5600 www.millersolar.com CA Lic. 773985
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
