Tuesday, October 23, 2018

[Electric Boats] Re: My 21 ft electric boat works

 

Adding a solar panel canopy is my project for next boating season.  Cruising under pure solar will be just as nice as sailing!

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Posted by: martinm@olypen.com
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Saturday, October 20, 2018

Re: [Electric Boats] How Efficient is a BLDC/PMAC Motor, Used as a Generator?

 

James,
See my addition in the files section from 12/4/14 titled "Windlass Motor Control". If you can't find it I can send it by email later. I'm away from my computer now. Any questions, let me know.

Chris

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Posted by: clh5_98@yahoo.com
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[Electric Boats] Re: My 21 ft electric boat works

 

Nice. And you can make the cockpit nice and shady with a hard solar canopy. About 1kw of solar panels and you are chopping high cotton.

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Re: [Electric Boats] How Efficient is a BLDC/PMAC Motor, Used as a Generator?

 

Hi Chris,


Please send details of the windlass and controller running on 48 volts.

thanks,

James



James Lambden
The Electric Propeller Company
625C East Haley Street,
Santa Barbara, CA
93103

805 455 8444

james@electroprop.com

www.electroprop.com

On Oct 5, 2018, at 5:19 AM, clh5_98@yahoo.com [electricboats] wrote:

 

Great ideas. You can also run your windlass and thruster with a Kelly controller. I bought a 24 volt windlass and run it off my 48 volt pack through a Kelly controller. Works great. I posted my schematic here a few years ago.

Chris


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Posted by: James Lambden <james@electroprop.com>
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Friday, October 19, 2018

[Electric Boats] Re: My 21 ft electric boat works

 

Congrats! Sweet boat. A bit over 400 watts gives you 3 knots; that's solar panel cruising territory - travel all day without draining your 48v Lead-Acid battery bank.


Speaking of FLA or SLA batteries, they don't mind sitting if they get daily micro charging. A small 50 watt, 60 volt PV array hooked to your 48v battery bank would keep them fresh for a decade. I'm 10 years on two parallel 40Ah FLA cheap deep cycle 12v batteries hooked directly (no charge controller) to a 15w solar panel on an inboard diesel sailboat. They have never seen a shore power charger, and only get alternator charged once every few weeks to 5 months. Daily charging amps below about 1 amp per battery are too weak to drive internal battery bubble formation, but are strong enough to reverse the overnight micro-sulfation. The biggest killer of deep cycle LA batteries is continuously accumulating sulfation, with industrial heavy use deep discharge claiming most of the rest (reasonably).

Another common way to minimize sulfation is those $5 wall-wart float chargers. Since I've had them fail silently and drain batteries, I favor solar.

Mark Stafford
eGEO, eKayak, eBike, eHouse, eMotorcycle

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Posted by: mstafford@natca.net
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