Planing hulls are a problem for electric power, if you want a reasonable operating time. Power to propel a boat goes up roughly as the cube of speed, so doubling the speed needs eight times more power. At displacement speeds (below what is often called "hull speed", which is very roughly 1.4 x square root of the waterline length in feet, with the speed in knots) then the power levels are quite low. For example, my pretty lightweight 17 ft boat uses around 100 to 120 watts to cruise at about 3.5 kts. To make my boat do 7 kts I'd need a bit under 1 kW, to do 14 kts I'd need maybe 8 kW. In terms of battery current, my boat runs at around 8 A normally, at 7 kts it'd draw about 64 A, at 14 kt it'd draw well over 500 A. This illustrates pretty well how power-hungry boats can get as speed rises.
You can gain a fair bit of efficiency by exploiting the high torque capability of an electric motor to drive a large diameter prop at a lower rpm. The efficiency gain is pretty good, so less power is needed than if it was a smaller prop turning faster. The big practical problem with this is that a big prop increases the boat draught, plus may suffer from weed and garbage entanglement to a greater extent. Both of these problems can be a real limitation if you mainly operate on inland waters where weed and shallows may be commonplace.
If you want a long run time using electric power then the only real way to go at the moment is a slow boat with an easily driven hull shape, something that's long and narrow, with no dragging transom at the stern, is pretty much ideal. It's pretty easy to build a boat like this that will run all day on a charge, provided you can accept running at maybe 4 or 5 kts rather than 20.