Double check the battery cables
MAKE SURE that ALL inverters have the EXACT same cable length
ie Go from batteries to a pos bus bar under the inverters and then find the longest pos run from the bus bar to inverter and make two of these the same length cables and connect.
the same applies for the Negative as well
Can you post graphs from VRM:
-battery voltage / current
My first suspicion: battery empty and one unit stops before the other, thus giving the error.
Can you also post the assistant settings?
I had the same, updated to the newest firmware, reinstalled asistand and redid all the settings. took my network cable first to mast from ccgx and then to slave. checked all my ribbon plugs on invertors. i also run on 2nd setting on ESS.
Its been running fine for a while now...... touch wood.
This is my site. Rod is my distributor. Further to Rods post... who ever instalked this system used the BMV700 shunt for the negative busbar, hence the stripped bolt because he/she was too lasy to get a longer bolt. The positive has a bolt for a busbar and the only thing we havent checked is the length of the dc cables. Will do next visit. Since i broke the parallel and have run the site of one multi in standalone mode whe have had no issues. The MPPTs havent recorded low battery voltage and no erro messages. The site has grabbed the grid once in 14 days on high load (4500w for 20 sec). The battery voltage graphs are much cleaner since we reconnected after the load test. Previous they were spongey. Im wondering if there was some debries under a link bar causing the issue. Will post before and after voltage graphs tomorrow. Note the batterys dropped 0.03 of a volt over 72h when we tested them.
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