This range estimator should give you a good ball park estimate for electric only range with Electroprop E series drives with Electroprop’s High Thrust Propeller. Results will vary with bottom condition, propeller, gear ratio, types of batteries used and house loads present.
Start by using a value of 1 for Power Level. Systems with optimized propellers use a power level of .75
If you know the range of your electric boat, let us know the Power Level that you use to for the estimator to conform to your data.
Consider the range at 2 knots of boat speed to be your motor sailing range.