How many batteries have you got and what power rating?
I have a 110 amp leisure battery in my boat, plus one of those power station for emergency and addtional power.
Is the 110 up to it to power lights, fishfinder, vhf (when I get one), the odd cuppa, not to mention starting the outboard, plus the bilge pump in an emergency?
Or should I get a smaller (85 amp) one for just the outboard and bilge pump?