Inverter : DC connections are very important.
It is very important that all of your doc power connections on your inverter be solid and correct.
DC voltage carries a lot more amps, therefore it will take a lot of power before your fuse blows. Always make sure your DC power connection is well done and secure.

Always fuse the connection according to your installation manual. Check your connections at least once a month if your inverter is installed in a mobile application and at least once every 2-3 months if it is a permanent inverter installation.
Remember you are dealing with electricity, so when in doubt hire a professional or at the bare minimum seek professional electrical advice on how to approach the problem.

