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.
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. 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. Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 Florida Certified Electrical Contractor EC13013208 On Fri, Dec 19, 2025 at 1:13 PM david quattro via RE-wrenches < [email protected]> wrote: > Hi everyone, > 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? > 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! > Thank you > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > 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/[email protected]/ > 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 > >
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