<div dir="ltr"><div dir="ltr"><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I don't have a definitive answer for you, but I do have additional questions! Have you looked into containerized battery solutions that may have integral bussing? I am not familiar with this market, but it seems like it would be the path of least resistance. </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">What inverters are you planning to use? With the max parallel Sol-Ark 15K inverters (12) or FlexBOSS21 inverters (16), you would "only" reach about 3,300 - 4,000A on the DC side. You could probably get this down programmatically without losing much functionality, if any.</div><br clear="all"></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">This DC ampacity rating suggests a very large battery bank. Are you subject to NFPA 855 residential limitations? I am looking for guidance on how to comply with Chapters 4-9 for residential installations in the easiest, unambiguous way possible. We have many clients interested in large battery banks, but I have resisted taking these jobs because of the seemingly onerous requirements.</div><br></div><div><br></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><br>Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div><div><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida Certified Electrical Contractor EC13013208</font></div></div></div></div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, Dec 19, 2025 at 1:13 PM david quattro 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:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi everyone,</div><div> I am still helping an uber wealthy owner determine if he really wants this much power. If he does, do any of you have experience sourcing a 48v battery-combiner on the order of 4500 to 5000 amps?</div><div> I also want to get clear on how to best wire from batteries to combiner, and from combiner to inverters. I read here on the Wrenches list about some electricians who strategically sized conductor AWG so that resistance matches, which seems straightforward once we get our components mounted and accurate distances can be determined. Can anyone on list provide feedback about that, I really appreciate it!</div><div>Thank you</div></div>
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