Sorry, our office still has no power after the hurricane, so support staff is unavailable. You can still submit a support ticket online using the link I posted above.
The code 000834 suggests that battery is deeply discharged, maybe solar is not providing enough power to overcome your daily consumption? Do you have ability to charge by any other means, such as shore power?
Our online support site has articles and videos explaining how to collect a data log from the app while observing the issue. Can you collect and export such log, or export a previous log when you observed the issue, so we can see all voltages and charge/discharge currents at the time when it happens?