They said that the battery can last up to 30 hrs! You would still have to register it, gas or battery, if theres a motor, california wants your money! Just declare it as a purchase from craigslist for 150 dollars and pay only 40 bucks for registration.
I like the GPS auto pilot. Yeah 4k for a kayak is alot but even Hobies can run past 3k. Id get a real boat for that money, but I dont have anywhere to store it.