The choice of model and power should be done considering length and displacement of the boat. On the following pages there are helpful selection charts to choose the proper model for your boat. This cover a lot of important of important parameters, which will address some of your questions to the different choices. That is because, it is not possible generalise with formulas, calculations or different charts, as there are plenty of situations due to the type of boat, the skill of the person who is making the anchoring operation, the wind force and sea condition.
These selection charts are the result of thirty years of experience and it must be considered as an important reference. Most of the comparisons between windlasses is done following the data declared from the manufacturer against which windlass is recommended for a specific length of boats.
That could be a mistake!
From our point of view, to get a correct evalutation, the windlasses should be compared for sizes, weight, mechanical strength, power and other visible features, so please do not compare windlasses having different features just because both the manufacturers recommend them for the specific length of boat.
Most of our anchor windlasses are available in two different electric motors, a powerful electric motor which is faster and has more pulling power, and a smaller one with a lower current draw so it is possible to use smaller cross section electric cables.