<div dir="auto">William, <div dir="auto"><br><div dir="auto">I am sure that I am not the only one on the list that appreciates your willingness to share your experience, well thought out analysis, and solutions. As always, thank you for your insights and ideas. And thanks for taking the time to highlight your positive interactions with Fortress. </div><div dir="auto"><br></div><div dir="auto">I too have had generally good experience with Fortress's support, which is no small part of why I've chosen to install many eVault Max cabinets, particularly for off grid systems. This is also, in part, why I chose to try their Envy inverter in my off-grid house that currently has an older 1300 ah lead acid battery bank (whenever I have the opportunity to try new to me equipment in my own place, I do so). </div><div dir="auto"><br></div><div dir="auto">I have used Sol-Ark in many installs, and have been generally pleased with them, but am growing weary of firmware updates that cause problems and errors between disparate brands. This issue has only grown more critical and troublesome with the advent of closed loop communications between hybrid inverters and Lithium BMSs. </div><div dir="auto"><br></div><div dir="auto">So I was anxious to try the Envy, which is promoted as working with many Lithium batteries in closed loop, as well as Lead acid, both on and off grid. I should have done more research before buying it for use in this setting. </div><div dir="auto"><br></div><div dir="auto">In short, in my opinion, the Envy is woefully inadequate for use with lead acid batteries. The programming and capabilities for use with a Lead Acid battery bank are on the verge of useless. And regrettably, in trying to understand how to set it up and dealing with what turned out to be serious shortcomings, talking with their support for many hours over several calls about this, was even more abysmal. I was basically told that I should not use the Envy with L-A batteries, it wasn't designed for such use, and if i did so, that was at my own peril (not their exact words). This inspite of their sales team and advertising saying otherwise. It was one of the worst support interactions I've had since talking with Xantrex (about issues with their TM500 meter interfering with the C40's functionality) 20 years ago. This was not the experience I was hoping for. </div><div dir="auto"><br></div><div dir="auto">I don't typically bad mouth a company here, especially one that I've enjoyed good results with. My preference is to highlight companies/equipment that have worked well for me. However, I have made multiple attempts to email their support team, their sales team and their higher level tech, with absolutely no response. Crickets. Now I am frustrated, hence this missive.</div><div dir="auto"><br></div><div dir="auto">I will be replacing the Envy with another more appropriately designed inverter. Hopefully, I will be able to do something useful with it. </div><div dir="auto"><br></div><div dir="auto">Howie Michaelson</div><div dir="auto"><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 27, 2024, 10:14 PM William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div class="m_-4291584728617138266WordSection1"><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">Friends:</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">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, <a href="https://millersolar.com/MillerSolar/case_studies/36_SIFortress/36_SunnyIslandFortressIntegration.html" target="_blank" rel="noreferrer">here</a> is the case study.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">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.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">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.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">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.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">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.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">Below is an excerpt from an email received today from Fortress.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Hi William,</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Apologies for the lapse in communication on this subject, we are still actively working on this case to provide you with a solution.</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">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.</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thank you for your patience.</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Warm regards,</span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Galen Gennaria</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">I will update the case study when new developments occur.</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif"">William</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Miller Solar</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">17395 Oak Road, Atascadero, CA 93422</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">805-438-5600</span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""><a href="http://www.millersolar.com/" target="_blank" rel="noreferrer">www.millersolar.com</a></span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">CA Lic. 773985</span></p><p class="MsoNormal"> </p><p class="MsoNormal"> </p></div></div>
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