Thursday, July 5, 2018

[Electric Boats] Re: Charging Questions

 


If both batteries are in good health, of course you can charge two in series exactly the same as if they were a single 12v. I have a 48v bank made up of 8 6v batteries in series, and my primary charger charges the bank as 4 separate 12v batteries. I have another charger that charges the whole bank as a single 48v battery. I have another one that I can charge an individual 6v battery. I have a fully manual charging system that I can use to provide an equalizing charge of 62v to the entire bank, or equalize single batteries separately, or feed the system underway from a 2kw portable generator on deck. FLA batteries are very flexible that way. Just make sure your connections are clean and tight, and all wires are of sufficient size. I use 2/0 welding cable for almost all wiring between batts, batts and chargers, or batts and propulsion system. No, it doesn't "need" to be that big, but bigger is better for limiting voltage drop through copper losses.

---In electricboats@yahoogroups.com, <yahoomail@...> wrote :

I have some T105 batteries (6V, 230AH) I need to charge.  I have a Shcumacher SC-8020 charger that I have trusted and used in the past.  


Is it OK for me to join two T105's in series and charge them as one 12v battery using a standard charger?


Would it be OK for me to take two banks of series connected T105's and connect the banks in parallel to get 12V and use my standard charger?


Is charging banks of T105's any different than charging a "normal" battery?



Chris Curtis



 

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[Electric Boats] Re: throttle

 

Doesn't even have to be a 5k pot. Any linear 5k pot will work just fine, for most any controller, and a 1k or 10k pot seems to work fine at least for Kelly controllers. All the pot is doing is taking a throttle supply voltage of typically 5v, and tapping it somewhere between 0 and 5v for the throttle input signal. There are linear taper pots, and audio taper pots. An audio taper pot will be very insensitive to a certain amount of turn at one end of its adjustment, and very sensitive at the other end. So it will work but be very fiddly. Your controller throttle circuit MIGHT work differently from that, so at your own risk and all that. But this is the simple way to interface, and it would be stupid to make it complicated. If you want the straight scoop, contact the manufacturer of the controller.

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Monday, June 25, 2018

Re: [Electric Boats] Re: Project lagoon 410

 

Hi Fred

How many time do you really have with only your 2x50 amp ( before using the generator)?

Cordialement
Pascal Morin
0690207491

Le 8 juin 2018 à 10:10, Berlouin Fred berlouin@yahoo.com [electricboats] <electricboats@yahoogroups.com> a écrit :

 

Hi Pascal

I have a 45' electric sailboat. I did the conversion. I do not regret. Throw overboard those two alcoholic, stinky, smoky crews maned Diesel … They are from another millennium.

Beware… they will try to come back onboard by all means or as avatar called technician or mechanical engineer. Be without mercy…. feed the sharks.

 

For your cat, I will guess the 2 x 5kw motors could be enough, but it does not cost much more to get 2 x 10kw. I have 1 x AC20 HPEVs rated 7hp only, and it is more powerful than a 25hp diesel.

2 x 50 amps lithium batteries are fine, they are only 25kg each. you can always add more with the time if you need. They are easy to fix. Don't bother with lead batteries, it does not worth it ( I have 2 x 50 amps…a backup battery is useful). 48v is fine, it is safe and common. For the charger, I will recommend an IP rating.

A small generator gives more confidence for sailing  and more comfort to live onboard.

About regeneration under sail, I don't get any. When I switch on the electric motor, the shaft slows down from 200 RPM to 30 RPM !.  With your cat, you may get a trickle from 8-10 knots sailing speed.

 

Oceanvolt and others have electric sail drives… I don't know the price. It will be a big boatbuilder job to fix new propeller shafts, shaft bearings and build up a 10mm steel structure to receive the new electric motors ...... Otherwise, find your electric motor, get the right gearhead with a compatible face and the proper reduction matching your propeller. There are so many gearheads from agriculture machine to IT robotic, google to find yours. The tricky point may be the coupling between the existing sail drive leg and the gearhead output. With a little of laser cut and DIY, you will get your way

Two improvements from my conversion would be:

-Regeneration at common and comfortable cruising sailing  speed.

-Wireless controller for the electric motor in marina, anchoring, sail handling…

Don't use any German product if you don't want to speak German, if you don't want an Hitlerian cross on your boat or if you want to use your boat.

I hope those few words will help. Have fun.  Good luck


On Thursday, June 7, 2018, 4:56:08 AM GMT+12, mike@electricyachtssocal.com [electricboats] <electricboats@yahoogroups.com> wrote:


 

I believe that the Lagoon 410 has Yanmar saildrives.  My recommendation would be to replace both the motor and saildrive as the most prudent way to go. Yanmar saildrives from that era are known to have issues.  You would be well served with two 20kW electric motors to replace the 35-40hp diesels originally installed by the builder.  They would also be well matched with a single 10 to 15kW generator that would provide range extension, reduce battery weight, and support reasonable cruising speed.

I am not fully up to date on all saildrive options, but would think you should look at these vendors: Electric Yacht, OceanVolt, and Torqeedo for marine grade systems.  There may be others that I am not aware of. 

Mike
Electric Yacht Pacific

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Tuesday, June 19, 2018

[Electric Boats] Re: 1983 Duffy 18 Thunderstruck conversion completed: 131MPGe

 

HI Benjablog,
Would you happen to have any pictures of how you completed the connection to the shaft and the motor mounting?  I have a 1996 classic 18 and I'm considering the same conversion.  Thanks!
Jim

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Sunday, June 17, 2018

[Electric Boats] throttle

 

I just replaced a Sevcon Millipak with a Sevcon Gen4 on a Solidnav unit. Turns out the 5k ohm Potentiometer is broken. Is the controller programmed to the specific pot or will any 5k ohm potentiometer work?

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Friday, June 8, 2018

[Electric Boats] Re: Project lagoon 410

 

Hi Pascal,
Motors are brushless ME0913 from Motenergy (5kw. I believe); packaged and programmed by Electric Yacht using Sevcon 4 controllers and belt reduction. E.Y. need to have Sevcon 'brain' returned to them to make any changes to the controller. (I'm not smart enough to program them myself). Motors get a little warm. I understand they are discontinued. New one is ME1306.
My 48v. battery banks are 700ah each. (Got a deal from Balqon)
Electric Yacht recommended 260ah. for 3-4 hours motoring (if I remember).
So far we have motored about 8 hours under batteries alone.
We have Honda 2000 generator on board; 110v. into the charger. We can motor as long as we have enough gas (petrol). Solar panels will be installed on the hard Bimini soon.
The Farrier hull shape is finer than yours - so doesn't take a lot to move the boat.
We had mast problems soon after launch (still waiting for replacement); so have not sailed enough to check out regen; but from all info. found on this forum - we should get some regen. over 6 knots. We only need 10 kts. of wind for that.
48v. battery chargers are Chinese, purchased from Elcon in Sacramento. Do NOT deal with them - they will not answer questions about the products they sell. Chargers are programmed to cut off charge at 56.8v. (conservative)! The chargers are available under different brand names from others.
We use Victron battery monitors.
Cheers
Graham

Sent from my iPad

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Re: [Electric Boats] Re: Project lagoon 410

 

Hi Pascal

I have a 45' electric sailboat. I did the conversion. I do not regret. Throw overboard those two alcoholic, stinky, smoky crews maned Diesel … They are from another millennium.

Beware… they will try to come back onboard by all means or as avatar called technician or mechanical engineer. Be without mercy…. feed the sharks.

 

For your cat, I will guess the 2 x 5kw motors could be enough, but it does not cost much more to get 2 x 10kw. I have 1 x AC20 HPEVs rated 7hp only, and it is more powerful than a 25hp diesel.

2 x 50 amps lithium batteries are fine, they are only 25kg each. you can always add more with the time if you need. They are easy to fix. Don't bother with lead batteries, it does not worth it ( I have 2 x 50 amps…a backup battery is useful). 48v is fine, it is safe and common. For the charger, I will recommend an IP rating.

A small generator gives more confidence for sailing  and more comfort to live onboard.

About regeneration under sail, I don't get any. When I switch on the electric motor, the shaft slows down from 200 RPM to 30 RPM !.  With your cat, you may get a trickle from 8-10 knots sailing speed.

 

Oceanvolt and others have electric sail drives… I don't know the price. It will be a big boatbuilder job to fix new propeller shafts, shaft bearings and build up a 10mm steel structure to receive the new electric motors ... Otherwise, find your electric motor, get the right gearhead with a compatible face and the proper reduction matching your propeller. There are so many gearheads from agriculture machine to IT robotic, google to find yours. The tricky point may be the coupling between the existing sail drive leg and the gearhead output. With a little of laser cut and DIY, you will get your way

Two improvements from my conversion would be:

-Regeneration at common and comfortable cruising sailing  speed.

-Wireless controller for the electric motor in marina, anchoring, sail handling…

Don't use any German product if you don't want to speak German, if you don't want an Hitlerian cross on your boat or if you want to use your boat.

I hope those few words will help. Have fun.  Good luck


On Thursday, June 7, 2018, 4:56:08 AM GMT+12, mike@electricyachtssocal.com [electricboats] <electricboats@yahoogroups.com> wrote:


 

I believe that the Lagoon 410 has Yanmar saildrives.  My recommendation would be to replace both the motor and saildrive as the most prudent way to go. Yanmar saildrives from that era are known to have issues.  You would be well served with two 20kW electric motors to replace the 35-40hp diesels originally installed by the builder.  They would also be well matched with a single 10 to 15kW generator that would provide range extension, reduce battery weight, and support reasonable cruising speed.

I am not fully up to date on all saildrive options, but would think you should look at these vendors: Electric Yacht, OceanVolt, and Torqeedo for marine grade systems.  There may be others that I am not aware of. 

Mike
Electric Yacht Pacific

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Posted by: Berlouin Fred <berlouin@yahoo.com>
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