BMW i3 Batteries Powers Torqeedo’s Deep Blue Electric Boats

JUL 23 2017 BY MARK KANE 18

BMW i3 batteries for Torqeedo (electric marine propulsion systems)

BMW’s batteries have found new application, besides powering plug-in cars and energy storage systems. The German company Torqeedo now offers BMW batteries in its electric boats.

BMW i3 batteries for Torqeedo (electric marine propulsion systems)

The Torqeedo high-performance Deep Blue electric drive systems uses a 33 kWh battery pack, offered for $31,999 plus shipping charges. The European site lists the pack for €29,397
(19% VAT included, plus shipping charge).

According to the specs, pack is limited to 30.5 kWh of available capacity, 55 kW of output power, and has warranty of 9 years till capacity will fade to 80%.

Depending on boat, there are 40 hp and 80 hp equivalent motor to choose from.

“BMW i continues to drive sustainable innovation with its futureproof technology and integrated approach. And now the high-voltage battery developed for the i3 is not only powering emissions-free mobility on the road, but on the water too. The BMW Group is supplying lithium-ion batteries from its Dingolfing plant to German company Torqeedo.

The marine drive system manufacturer is using them for energy storage in its high-performance Deep Blue electric drive systems. Torqeedo was founded in 2005 in Starnberg, Germany and is leading on a global basis as a provider of electric and hybrid propulsion systems for motorboats from 1 to 160 HP for sailing yachts and commercial marine applications, such as ferries and water taxis.”

BMW i3 batteries for Torqeedo (electric marine propulsion systems)

BMW i3 batteries for Torqeedo (electric marine propulsion systems)

BMW i3 batteries for Torqeedo (electric marine propulsion systems)

Dr Alexander Kotouc, Head of Product Management BMW i explains:

“We see the decision by Torqeedo to use BMW i high-voltage batteries for their Deep Blue propulsion system as further evidence that we can build the drive systems of the future without any need for compromise on performance, innovation and sustainability. This successful transfer of the latest automotive technology to the water is testament to the value of the integrated approach that underpins BMW i.”

Christoph Ballin, Co-founder and CEO of Torqeedo said:

“The BMW i high-voltage batteries are a model of extraordinary reliability and performance for electric mobility. They allow us to deliver state-of-the-art electric propulsion technology and integrated energy management for leisure craft and commercial marine applications.”

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18 Comments on "BMW i3 Batteries Powers Torqeedo’s Deep Blue Electric Boats"

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Or get a 60kWh bolt battery from GM for ~$11,674.84

GM should do the same.


I don’t see the A/C system to control the battery pack’s temperature. Maybe it’s in another compartment in the boat. However, there’s no mention of battery pack temperature management on the Torqeedo Website.

Nevertheless, its battery pack has a warranty that guarantees more than 80% capacity after 9 years which is better than the warranty of the same battery pack when in an i3. Maybe marine use is easier on a battery pack than auto use. Likely no regen. 80 hp max whereas the i3’s max power is 175 hp (but only briefly), so lower power output would result in less heat generation.


It’s a boat, it has a huge amount of cooling available just by running water past the bottom of the pack, do they actually need any control other than ensuring sufficient water is moved to deal with maximum load?

Blista Compact
I converted a small boat for my kids, using a battery from a Renault Twizy. Muck smaller in every way.. but good enough. There is a huge demand for EV batteries when they crashes, and must be scrapped. They used to be cheap(ish), but more and more people find a use for the batteries. I’m sure it has to do with the trend that people make more stuff, as a hobby. Not to mention the chance to get a used cheap(ish) EV battery.. Anyway.. I placed the batteri in the middle of the boat, for good weight/balance. Bought the motor and everything else from an Austrian company that makes them ( There are several lakes in Germany and Austria where ICE powered boats are not legal, but electric boats are. They sell (an expensive) but good motor and motor controller. I made a rustproof box for the battery, that is sealed (but has a ventilation hose in and out. And I have installed a sea water heat exchanger, that cools the box. The ventilation blows air past the heat exchanger, and in to the battery, and the exhaust air flows out from the other end of the box. In the… Read more »

The connection point for the refrigerant loop is obscured by the decking in the photos.

La Frennia di Mamata

I can Guarantee that they do not pay Retail price for those Batteries. HOWEVER., They are put to much better use in this Particular application. On a larger Cruiser you can easily install a solar cell/canopy roof & charged for free while docked or or cruising. This will be a Clean , quiet & Much Less Problematic than any “ICE” Boat, while cutting that fuel bill and all that Boat “ICE” Maintenance right down to just about nothing !.”WOW”.A boater’s Dream come true!


Only for the wealthiest ($50K vs. $8K with very limited range) and the most committed.

This is a case where propane powered outboards which will cut emissions by 70% would be the practical way to go, least for the first half of this century.

Outboards cost about the same, propane is cheaper, takes slighter bigger, heavier tank for equivalent range which is about 75% of gasoline on a per gallon basis.

Blista Compact
I have three boats, and two use inboard eninges. It is very little maintenance on a marine diesel engine – and I can do it all myself. The one with the Volvo Penta is 26 years old, and have been used a lot. I only change the oil, oil filter and cooling fluid once a year. I change the air filter every three years (still looks fairly new when I change it), and the impeller every two years. It has been running flawless all this time. The other is a Yamarin diesel engine that is from the early 80ies. It does not have an oil filter, so there it’s an oil change once a year, and I change the impeller and a sink anode every two years. It has also been running flawless all these years. Maintenance cost little, and takes about 1 hour for both the engines in total. The smallest boat has an outboard engine, a Johnson, that is from the early 90ies. I change the oil in the gear housing once a year, and clean the engine. There is also a greas nipple that gets a refill once a year. I change the impeller every 3 years,… Read more »

To give some perspective, a 75 hp outboard is about $8K vs. the $32K of the battery system and $25,000 80hp electric Torqueedo outboard.

And the weight is a bigger issue than for cars.

Their best application is on sailboats where the weight can be ballast and the power requirements are small relative to boat size.

Two neighbors have them on sailboat and small sport boat.


Yes, a small cruising sailboat. Perfect use, videos available on the internet.


But a heads up.
The most unpopular person at the Marina is the person using a space heater. Unless it’s world class wiring, everyone else gets a brown out.


Unless it’s up to code wiring you mean at least in the US. Best to stay out of any marina that the lights dip when a space heater is turned on as it will soon be en fuego.


Just show’s you where I’ve been tied up. Solar boat lifts are common, and with a private lakeside dock, a solar canopy/speedboat might be practical.

Blista Compact
I have a sailboat that I will install an electric motor and a motor controller + batteries in. Now it uses an old Yamarin diesel engine that weights a LOT. Considering the 10-12 Hp engine.. it is really heavy. It is based on a really old 2 cylinder diesel engine Perkins made, that Yamarin bought the drawings for. They chopped one cylinder off, and made some minor adustments. The result is a diesel engine that can run for days on a tank, super economical. But it’s getting real old, and Yamarin parts are expensive.. and I think a new motor will be nice – when I rebuild the sailboat. The diesel tank, when full weighs about 60kg. I’m going to replace the diesel motor, tank and other stuff. I can not place the batteries as ballast, as that is in the keel already. But I can place the batteries really low in the keel, and the Aquawatt motor weighs a lot less, and I don’t need the diesel tank and so on. So the overall balance and weight will be better. I’m going to do a major job with integrating solar cells in the deck, flush. The space saved with… Read more »

What a great looking boat! Torqeedo has other videos, they sell some great small motors with a detachable battery and a folding solar panel. I can see spending hours with this boat at speed and then hanging out while floating a much larger fold out solar panel. Somewhere on the internet I saw a Tesla launch an electric boat that then sped away. Almost all you could hear was gravel under the tires and a few birds chirping at the boat ramp.


Every boat I have been on sooner or later takes some water in to the passenger/engine area. A big old battery under water is kind of a scary thought…


The battery is very well sealed. During normal manufacturing of a i3 pack the battery is tested fully submerged.
I’d be more worried about exposure to salt…


pathetic price! what are they trying to accomplish by overcharging 10 times?