I found that one of the solar panel connections had corroded and broken away from the spade lug.
Indeed all the connections showed severe corrosion issues. Definitely time to replace this "temporary" setup. So that's what I did. I've mentioned before I really like Anderson Powerpole Connectors for a lot of connections on board for a number of reason. One is they have wiping contacts that help clean the contact surface when connecting and disconnecting. Plus they are compact and can be ganged together. Another advantage is they have color coded cases available:
Since I'll be connecting 48 volt solar panels it is a good idea to follow the Anderson color code for their Power Poles. For 48 volts the recommended color is blue. I used it above for the positive 48 volt panel connection. This helps avoid confusion with the 12 volt panels that are also part of BIANKA's solar bimini.
Another thing with Anderson Powerpoles it is also easy to make up "two fer" cable harnesses so that in this case I can connect two separate solar panels to the same solar charge controller. This ability to quickly connect and disconnect the connectors helps in troubleshooting or taking voltage and current measurements of the panels.
As is the Anderson Power Poles are not particularly waterproof. So what I usually do is fill the back end of the connectors (where the wire enters) with Marine GOOP and then cover that with some electrical tape. Another wrap of electrical tape around the connector case joint ensures even more protection from moisture.
With the new connections more waterproof than my previous installation I should not have to revisit this area of my electric propulsion charging system for long time.