Thats awesome! Im planning to use a similar configuration for prototyping a simple display. Im curious about the server hosting and coding aspect of the dashboard though. That's a nice touch. Great work
On Tue, Sep 8, 2026, 3:52 PM Jason Szumlanski < [email protected]> wrote: > If anyone ever needs tips on how to tap data from the Communication Hub, > I might be able to help. I developed a custom solution for a client that > uses an ESP32 board with RS485 and CAN to pull data from two banks of EG4 > batteries and display the SOC on a web page. > > Long story short, I have 23 of the V1 batteries and seven V2 batteries, > and I'm pulling data for the 23 from the RS485-3 port on the hub and data > for the 7 from the master battery's CAN port in that comm chain. A single > LilyGO T-CAN485 does all of the work, uploading it to a server where the > data is decoded and displayed. This battery bank is open loop with a > Sol-Ark 15K and four Chargeverters. The client wanted to see the battery > BMS SOC remotely since the Sol-Ark SOC was wildly inaccurate. > > The customer-facing site displays the weighted average of the SOC and voltage > and the sum of the charge/discharge rate. I also have a more detailed > Admin site. > > Sadly, the Communication Hub doesn't seem to send per-pack data to the > "inverter," which in this case is my device. I also can't figure out how to > grab the per-pack data from the v2 CAN bus. Maybe another day... > > > Jason Szumlanski > Florida Solar Design Group > _______________________________________________ > 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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