Hi @dtrail,
It should be possible to check that the DVL is starting up correctly by connecting it directly to your computer and seeing whether its web interface is accessible.
From your description it sounds like there might be some kind of power issue, in which perhaps the DVL is defective? It doesn’t make sense for a DVL to draw too much current for the battery to handle, so either there’s a short circuit somewhere or perhaps the DVL has not been connected correctly.
Can you describe how you’re connecting the DVL to power and to the vehicle? 