Powerful Torqeedo Hybrid

[myocean]

News from Privilege and Torqeedo about Hybrid Caramaran
http://www.seamagazine.com/torqeedo-...ury-catamaran/

[Sos]

"A fully charged system delivers 20 nautical miles of noise-free motoring at five knots speed."

Throw in some wind and tide and I bet that drops. Not a very practable solution.

[StuM]

Originally Posted by Sos

"A fully charged system delivers 20 nautical miles of noise-free motoring at five knots speed."

Throw in some wind and tide and I bet that drops. Not a very practable solution.

The thing that got me was 100 kW of propulsion (2 x 50kW motors) driven by a 22kW generator which can apparently charge the batteries at the same time.

I would be interested to know the size of the battery bank that gives that 5 knots for 4 hours.

[myocean]

Originally Posted by StuM

I would be interested to know the size of the battery bank that gives that 5 knots for 4 hours.

Its 40 kWh.

[myocean]

Originally Posted by StuM

The thing that got me was 100 kW of propulsion (2 x 50kW motors)

Such high power you need typically in critical situations e.g. to get out of an anchorage at night because there are suddenly 40 kts of wind. You need that may be for 10-15 minutes to solve the situation.


Disclaimer: I am employed by Torqeedo

[Matt Johnson]

Originally Posted by StuM

The thing that got me was 100 kW of propulsion (2 x 50kW motors) driven by a 22kW generator which can apparently charge the batteries at the same time.

I would be interested to know the size of the battery bank that gives that 5 knots for 4 hours.

At least 100kw is a more realistic number than the low ones other "hybrids" are claiming is safe.

Matt

[transmitterdan]

Much less hype than some others trying to break into this field. Power of drive units at 50kW per side seems about right.

Still some unrealistic hype about hydro generation. I don't think it is realistic to think even 5% of total kWh consumption on a cruising yacht can come from hydro. And probably even less when the drag slows the boat.

Generator size (22kW) is plenty big enough. Maybe too big for some.

So the electric numbers look good. What is the delta $ cost over old style 3 rotating iron device systems? If I have to ask then I can't afford probably.

[StuM]

Originally Posted by transmitterdan

Much less hype than some others trying to break into this field. Power of drive units at 50kW per side seems about right.

Agreed. More data is always desirable, but given the wild claims in press releases that we have seen in another recent EP thread, this one is refreshingly honest.

[StuM]

Originally Posted by myocean

Such high power you need typically in critical situations e.g. to get out of an anchorage at night because there are suddenly 40 kts of wind. You need that may be for 10-15 minutes to solve the situation.

Disclaimer: I am employed by Torqeedo

Unfortunately, that assumption is common with EP proponents and has been refuted many times.

(It also assumes that you have full batteries when such a situation arises. Just hope that 40kts of wind doesn't come up at 5:00am after "you've been doing this all night: " Even air conditioning systems can be operated without running a generator at night." )

[44'cruisingcat]

Still baffles me why these hybrids always have such small generators.

This one can't run one engine at 50%.

[44'cruisingcat]

Originally Posted by myocean

Its 40 kWh.

That's going to weigh a bit and cost plenty.

[StuM]

Originally Posted by 44'cruisingcat

That's going to weigh a bit and cost plenty.

At around 15Kg and $1000 per kW for Lithium, that's only about 600Kg and $40,000

[StuM]

Or around 30Kg and $100 per kW for FLA, that's only 1200Kg and $4000 - but a lot less of that 40kW would be usable.

[myocean]

Originally Posted by StuM

(It also assumes that you have full batteries when such a situation arises. Just hope that 40kts of wind doesn't come up at 5:00am after "you've been doing this all night: " Even air conditioning systems can be operated without running a generator at night." )

Even is the battery is half full only you can still run about 15 minutes with full 100 kW, starting the genset in parallel. So if you want this safety, you tell the system not to use more than 50% at night. (may be not cool down the entire boat at night)

[myocean]

Originally Posted by transmitterdan

So the electric numbers look good. What is the delta $ cost over old style 3 rotating iron device systems? If I have to ask then I can't afford probably.

It's a luxury yacht, so we should not talk about prices too much. But I can tell you that the stystem price is in the range of 10% of the boat price, including additional Li-24V bank, HV-AC Inverter, 220V/15kW, solar chargers, twin stations, touchscreen user interface etc.
Practically all components are heavy duty, water resistant units. Battery capacity warranty: 9 years.