Cigarette Electric 42' Raceboat

I have seen several of the new technology regarding diesel electric and etc. and figured I'd post about this since it hasn't been mentioned. Cigarette and AMG Mercedes partnered together to make this happen. This is full electric and don't know why they didn't put a small diesel generator and diesel tank to charge the batteries and extend the range, but the technology is pretty impressive. Judging by the specs a 8KW generator should charge the batteries fast enough to extend the range at least 4x and all they'd need is a 20 gallon diesel tank and burn about 3/4 of an hour to recharge itself. 2220hp and 2200lbs of torque, it can be recharged fully in as little as 3 hrs with a 250v/50amp shorepower connection. In a 38' Cigarette, it will do over 100mph and can do 70mph for an hour straight with enough power to make it back to the dock to recharge or cruise at 50mph much longer with it's lithium ion batteries. But it shows how quickly technology is moving foward. The big problem is the buyers can't figure out how many speakers they need on the transom to make the fake annoying raceboat noise to piss everyone off!!!!!!!!!!!!

I didn't post a link, but you can google it and get some good articles.

True, but if you're running at 50 mph which would be 50% or less an 8kw generator would probably keep up with the electric demand. There are several articles that are on the web on it. One article states 9 minutes WOT with enough capacity to cruise back to the dock, an hour at 70 mph, and over double that at 50 mph which would be a realistic cruise speed in a boat like that. I could see blasting down to Miami at 70 mph from Ft. Laud, stopping for lunch at Bayside or Miami Beach Marina while the generator recharges the battery.....But then you're getting into the weight of the generator.

Something is wrong with your math. A 250volt/50amp shorepower connection will charge the batteries in 3 hours. An 8-10KW generator will put out 50amps at 250volts....If the boat can cruise at 50 mph for over 2 hours, then technically the charger should extend the range by an hour or so, but also allow it to recharge itself......It takes 2200hp to achieve 100mph. 50mph should then be 275KW but the motors run at 400 volts.

You're not taking voltage into the equation and that they're converting DC power to 3 phase AC power for the motors. The electrical on this is a little out of my league. However, I do know that a 8-10KW diesel generator will put out 50amps at 240 volts. The batteries in the boat hold 240 KWH of electricity. The published data says that a 240volt-50amp shorepower connection will fully charge the batteries in 3 hours. The published Data says that the 2-220KW chargers on the boat use 44amps at 240volts. So if the engines are using 275KWH at 50mph, then technically a 8kw generator that will run the 44amp 2-220KW chargers, than the boat can run at 50 mph until you run out of diesel for the generator. This is all based upon published material on the boat itself.

I also know a Newmar 24volt 95amp battery charger will use a maximum of 16amps at 240volts.

Well, if that is true. Why do all of the websites say that you can fully charge the batteries with a 240volt-50amp shorepower cord in 3 hours?????? A 8kw generator will put out 50amps at 240 volts. So somehow your math for recharge time is not correct.

The other website says 3 hours to full charge, that aside.

It is deriving all of it's energy to run those battery chargers from a 240volt-50amp shorepower cord. An 8-10kw generator puts out right around 50amps at 240 volts, so the input power for the chargers would be the same.

"the powerboat is fitted with two 22-kilowatt on-board chargers from the 'SLS AMG' coupé electric
drive as standard - fully charging in approximately seven hours, with additional options to reduce
charging to less than three hours."