Re: How do I calculate my power needs?
Download "Battery, Load and generator calculator" by Bill Roosa here: Sailboat Solar Panel News---Information
It will give you something to experiment with.
You can also check your battery voltages after a day and see how the % you have drained the batteries. That will give you another estimate.
Also see the Don Casey Library, "solar panels and calculating demand": Sailboat Solar Panel News---Information