Factoring in the need for electric power
by Greg Weykamp
By now, we’re all getting used to seeing electric vehicles (EVs) on the road everywhere we go, and we’re now seeing more and more electric boats on the water. If this sounds surprising, consider the following numbers. In 2010, only 300 EVs were sold in the USA. In 2023, that number rose to over 1.2 million in the US and over 9.5 million worldwide. What is the bestselling vehicle in America? The Ford F150 of course, with over 750,000 sold. Worldwide though? The bestselling vehicle of any type was the Tesla Model Y, with 1.23 million sold – nearly half a million more than the F150. The second most popular car in the world was the Toyota Rav4, which costs on average $20,000 less than the Model Y. As this is a magazine about marinas, why do we care about that?
A solar walkway in the Maldives harnesses clean energy for waterfront use. Images: Seavolt
Starting next year, the sale of new ICE vehicles will be banned in Norway, and ICE powered boats will be banned in the central historic canals in Amsterdam. In 2030, new vehicle ICE bans are due to take effect in the UK, Iceland, Sweden, Israel and Singapore. In 2035, Canada, the European Union, Japan and Chile will implement bans, and more will follow in 2040.
While the US has not set a date for the end of ICE vehicles nationwide, at least twelve states will ban new ICE vehicles starting in 2035, including coastal states such as California, New York, Rhode Island, New Jersey, Connecticut and Maryland. If your marina is in any of those states, it is only a matter of time before more and more of your customers start showing up with electric powered boats.
Serving electric powered boats in our marinas raises some interesting issues we all need to start preparing for, including building charging infrastructure (and eventually selling less petrol/gas and diesel) in both wet slip and drystack marinas, fire safety, and weight considerations in drystack facilities (electric powered vehicles of any type are currently significantly heavier than ICE powered vehicles due to the weight of the batteries).
Seavolt’s Ocean Sun single ring solar panel
Let’s address fire safety first, since the way the news media covers EV fires encourages most people to firmly believe they are far more likely to catch fire. The truth may surprise you though. According to NHTSA statistics, there is a car fire every five minutes in the US. Sixty-eight out of every 100,000 ICE vehicles will catch fire every year, with the most common cause being electric wiring. In comparison, only 3.8 out of every 100,000 electric powered vehicles will catch fire.
This means that an ICE vehicle, likely the one you’re driving, is 29 times more likely to catch fire than an electric vehicle. The majority of EV fires are caused by physical damage to the battery, such as hitting an object or a collision rather than faulty components. The bottom line is that if you’re worried about an electric boat catching fire in your marina or drystack facility, you should really be worried about all of those boats with a tank full of combustible liquid!
While EV fires are quite rare, they are very difficult to extinguish. As fire departments become more familiar with EV fires, they are developing new techniques to address them. These include techniques to breach the battery compartments to apply water directly to the location of the fire, which has proven to be very effective, or special blankets to contain the fire.
While I can assure you that the statistics support the fact that electric vehicles are much less likely to catch fire, the same cannot be said of lower priced and poorly designed e-bikes, e-scooters, hoverboards, and other similar low-cost electric powered toys. There have been a number of instances of fires caused by cheap e-bikes during charging, leading to fires and bans on storing or charging them indoors. At least for now, while we believe it is safe to store and charge electric boats inside since they are very well engineered, we do not recommend allowing e-bikes or similar electric powered toys to be charged unattended inside boats or buildings.
Electric boat charging pedestal at Sanctuary Cove Marine, Australia.
Charging of electric vehicles of any type, boats or cars, falls into one of three categories. Level 1, or slow charging, uses a standard 120v 20amp receptacle, just like you might use to charge your phone. For most cars, this level of charging can add four to five miles of range per hour. While this might work to charge your Torqeedo outboard, it is not much use for charging the much larger battery of an electric boat propulsion system.
Level 2, or medium charging, typically uses a 240v 48amp or similar receptacle. This level of charging can add 40-50 miles of range per hour, or roughly a ten-fold increase in charging speed. This level will fully charge most vehicles overnight or in six to eight hours.
Finally, Level 3, or fast charging (often called “supercharging”) relies on Direct Current systems at up to 350kW. These systems can charge at speeds of up to 1,000 miles of range per hour, and charge nearly any electric vehicle from zero to 100% in 40-60 minutes.
So, what will we need to provide in our marinas to take care of our boaters? For the most part, Level 2 medium speed charging is sufficient for the vast majority of boating activities using a standard 50amp shore power connection. As we design new marinas to incorporate the new ground fault protection requirements, we recommend consideration of building in additional capacity for future increases in demand for electric power. While not likely a major issue in the next ten to 15 years, once there are a lot of electric powered boats in marinas, we will be seeing “load sharing” technologies that are already present in Level 2 home EV charging systems to balance charging loads throughout the marina.
For special use cases, such as boat rental facilities and high traffic transient docks, several manufacturers produce high speed Level 3 chargers that should be organised much like a fuel dock. Don’t locate them on your fuel dock though, because you don’t want them taking up space for 30-40 minutes, and there are specific requirements for how close they can be to fuel dispensers.
Charging up an electric boat in Sydney Harbour.
Charging an electric powered boat in a drystack facility presents a few challenges, the most obvious of which is how to plug in a boat on the third or fourth level of your rack? Potential strategies to address this using existing technology for the foreseeable future might include locating electric boats only on the bottom level where access is easy, or charging the boats in a service rack using a high speed charger before storing the boat in the rack later.
Keeping in mind that we’ve only really had EVs in high volumes for about 15 years, newer technologies that might transform the industry in the future include induction charging built into the racks and hulls of boats, battery swapping, or most likely, increasing charging speeds by a factor of two or three times, will eliminate the issue altogether once charging becomes as fast as filling a gas tank.
Who builds electric boats?
Start looking for electric boats at your next boat show, and you might be surprised at how many options are already on the market. Just like the automotive industry, the market for electric boats is starting at the high end and will eventually trickle down to lower priced options.
Some of the most interesting boats available today are the Nautique GS22E powered by Ingenity, which is a very capable wake sports boat that is fully electric, runs two to three hours in full wake sports mode, and can hold up to eleven people. Other builders include X Shore, Candela, Navier, Duffy and Forza, all of which are pushing the boundaries of the technology.
Torqeedo builds a wide range of electric drive systems ranging from small outboards up to 100kW systems capable of powering much larger vessels.
In summary, if you haven’t explored the world of EVs or electric boating, I highly encourage you to give it a try. Having driven exclusively electric powered vehicles myself for the last four years, often more than 30,000 miles per year with regular long road trips of well over 600 miles, I can assure you that the technology is ready for prime time and only getting better. The cost of fuelling and maintaining an EV is much lower than ICE vehicles, and when you consider the total cost of ownership, EVs are generally less expensive overall despite higher initial purchase prices. I firmly believe that electric powered boats will make boating more fun, quieter, cleaner and less expensive in the future, and the future will be here before you know it!
Gregory Weykamp is president/principal of Edgewater Resources, LLC, a waterfront consultancy based in Michigan, USA.
