I looked at the Solomon ad:
Before you put your money down, get a real comparison of fuel cost based on equal power to the propeller/s. Comparing the fuel flow for twin 29 HP (Why 29 HP?) diesels with the fuel flow required to run a genset supplying 6 HP electric motors doesn't sound like an apples vs. apples comparison. As they say in Sweden, something is rotten in Denmark.
If you really want electric propulsion, go for it, but do so with your eyes open.