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Sarge
Joined: 12 Mar 2007 Posts: 488 City/Region: Edmonds
State or Province: WA
Vessel Name: Sea Badger
Photos: Gigi
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Doryman
Joined: 03 Oct 2006 Posts: 3807 City/Region: Anacortes
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 255 Tomcat
Vessel Name: Lori Ann
Photos: Lori Ann
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Posted: Thu Apr 26, 2007 8:25 pm Post subject: |
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Sarge wrote: | It would need to be able to produce 800 watts, since that appears to be what it needs to charge it....if I understand their specifications correctly. |
800 watts for 12 hours. Would someone who understands batteries, inverters and generators better than I do help me with some calculations if I set my boat up like Dreamer, with 2 Lifeline 8d AGM house batteries of 550 Amp hrs., and and Outback 2000 watt inverter.
If I use a 1000 W generator how long would I have to run it to recharge the house batteries after using them to recharge the Torqueedo (800 watts)? 12 hours? If so then maybe I should reconsider getting a gas motor.
Thanks,
Warren _________________ Doryman
M/V Lori Ann
TomCat 255, Hull #55, 150 Yamahas
Anacortes, WA
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Adeline
Joined: 03 Nov 2003 Posts: 985 City/Region: Vancouver
State or Province: WA
C-Dory Year: 1989
C-Dory Model: 22 Cruiser
Vessel Name: Adeline
Photos: Adeline
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Posted: Thu May 24, 2007 9:19 pm Post subject: |
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Now that I've got my dinghy, where oh where shall I put her motor. On a 22 there wouldn't seem to be too many options. But, I found a spot. No new holes and it drains into the well. She sits atop my "Tackle Table" on her Fulton Aux motor-mount. The table itself is simply held in place by gravity and secured with teak cleats(5200). _________________ Pete
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thataway
Joined: 02 Nov 2003 Posts: 20841 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Thu May 24, 2007 10:27 pm Post subject: |
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I am not sure about the 800 watts for the charger. but there are several possibilities. "The Travel 801’s input power is 800 watts. Rated power is 29.6 volts. Final charge is 33.6 volts." (from the brochure) So, you should be able to rig up solar cells in series to provide a charging circuit. (three 12 volt solar panels with a 36 volt regulator)
Next, the inverter/charger: If you need 800 watts for 12 hours, this is a lot of power! and I question the amount, based on the following: 800 watts at 12 volts is about 67 amps--take into account ineffeciency of the inverter you are close to 70 amps for 12 hours--or a total of 840 amps. (I could have just used the 800 watts/direct conversion for 800 amps)--so if you have a 550 amp hour battery bank--which the Dreamer bank is--you would have run it down over three times (figuring 50% discharge max--or 275 amps effective available power). An outboard alternator puts out 35 to 45 amps (average) when running at full power, but that is only half of the 70 amps you will need. So this does not seem like a real effecient way of charging these motor's batteries--assuming it really needs 800 watts! So basically if it needs 800 watts for 12 hours it requires about 3x the two 8D battery banks....that is why I doubt the current draw.
Consider that the capacity of the battery is 800 watts @ 30 volts or 26 amps--that is perhaps more reasonable for a lithium ion battery. (the equivilant to about a 70 amp 12 volt battery--which is like a U1 or garden tractor)--and I suspect this is closer to the power. If this is the case, the power for a charger is signivicantly less. Some one with one of these chargers has to measure how much power it uses, or write the company.
I suspect that the charger will be more in the way of several amps at 110 volts or 10 to 20 amps for an inverter--and this is managable.
Yes, EU 1000 will produce 900 watts, but that would be running at full throttle, not eco throttle.
I would have to assume that the best use would be to leave with a fully charged battery (and perhaps a spare) and then recharge when you overnight at a dock (or use the solar cells). _________________ Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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Doryman
Joined: 03 Oct 2006 Posts: 3807 City/Region: Anacortes
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 255 Tomcat
Vessel Name: Lori Ann
Photos: Lori Ann
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Posted: Fri May 25, 2007 5:09 am Post subject: |
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thataway wrote: | Some one with one of these chargers has to measure how much power it uses, or write the company. |
i wrote to Torqueedo customer service and received no reply. That's one of the reasons I decided not to get one even though I like the idea of going green (I acknowledge that recharging the batteries with petrol-driven solutions is not totally green).
Warren |
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thataway
Joined: 02 Nov 2003 Posts: 20841 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Fri May 25, 2007 2:58 pm Post subject: |
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The local Boat US has of the 800's I'll see what their charger looks like this PM. It should give some numbers. |
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thataway
Joined: 02 Nov 2003 Posts: 20841 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Fri May 25, 2007 6:24 pm Post subject: |
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OK, I went to the Boat US/West Marine and they had one of the 800's. The charger is 80 amps--40 volts nominal max current at 2 amps charge rate. Converting this back to 110 volts, it is about .8 amps. Any 100 watt inverter--I would go to 200 watts, will handle this easily. The engine basicially is a 24 volt engine, but as I noted above the battery finish charge is about 36 volts.
This allows lots of options for charging--including the solar panels I mentioned. An inverter running off any battery bank, charged by the main engine. Or even a direct switching power supply 12 to 36 volts. |
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Sarge
Joined: 12 Mar 2007 Posts: 488 City/Region: Edmonds
State or Province: WA
Vessel Name: Sea Badger
Photos: Gigi
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Posted: Fri May 25, 2007 6:44 pm Post subject: |
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"Thataway" Bob,
So, are you saying that I could get a 200 watt inverter, one that plugs into my cigarette lighter plug and recharge my Torqeedo 801 battery?
Thanks,
-Sarge/Carl _________________ -Sarge
2001 2150 Bayliner, sold
2007 CD25, sold
2007 Harbercraft Kingfisher 2850, sold
2011 Stabicraft 2250SC, sold
2011 Eastern 18cc
Blog: http://theseabadger.wordpress.com |
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Doryman
Joined: 03 Oct 2006 Posts: 3807 City/Region: Anacortes
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 255 Tomcat
Vessel Name: Lori Ann
Photos: Lori Ann
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Posted: Fri May 25, 2007 10:45 pm Post subject: |
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Bob, thanks for the research and explanation. Looks like the Torqueedo option is back in play. Have to consider whether or not I would want to use a 3.5hp Tohatsu as a trolling motor like you did.
Sarge, how do you like your Torqueedo so far? What are the plusses and minuses?
Warren |
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thataway
Joined: 02 Nov 2003 Posts: 20841 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Fri May 25, 2007 11:06 pm Post subject: |
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Sarge, From what I saw at the dealer it should work on a 200 watt inverter. Do you have a "Kill-a Watt" meter? I suggest that all boat owners have one. They meassure amps use, volts, frequency and watts. The unit plugs into a socket, and you plug your chager into the Kill-a-watt, to find out exactly how much power it uses. The "Kil-a-watt" plus a good digital volt meter will allow you to solve almost 100% of your electrical probems on a boat (house RV etc).
There is what is called a "power factor" for a battery charger, and I am not sure what it is for this charger. The "power factor" for an inductive load in a battery charger is basically the amount more power (volts/amps) required to produce the charging output. For example if it is 80% more power required for this output, it has a power factor of .80.
The theoretical requirement is about 80 watts, but I suggest 200 watts to be sure that you have enough resever for an inverter. |
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sportner
Joined: 08 Mar 2006 Posts: 386 City/Region: Buckeye
State or Province: AZ
C-Dory Model: 26 Osprey
Vessel Name: Glory Days
Photos: Traveler
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Posted: Mon May 28, 2007 1:00 pm Post subject: |
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I finally posted some pictures in my album of the bracket we use to carry our dinghy motor on our 25' cruiser. The bracket is made from plywood. The aluminum was given to me from scrap from a local supplier but it shouldn't cost much. Fastened with glue and stainless crews then painted. The Magma clamps were bought at West Marine and were about $45. _________________ RUSS & TONI |
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Sea Wolf
Joined: 01 Nov 2003 Posts: 8650 City/Region: Redding
State or Province: CA
C-Dory Year: 1987
C-Dory Model: 22 Cruiser
Vessel Name: Sea Wolf
Photos: Sea Wolf
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Posted: Mon May 28, 2007 1:21 pm Post subject: |
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RUSS-
Very nice! Well thought out, simple, and very functional!
You may be getting requests for dimensions and drawings soon!
LINK to the rest of the photos.
Joe. _________________ Sea Wolf, C-Brat #31
Lake Shasta, California
"Most of my money I spent on boats and women. The rest I squandered'. " -Annonymous |
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Sarge
Joined: 12 Mar 2007 Posts: 488 City/Region: Edmonds
State or Province: WA
Vessel Name: Sea Badger
Photos: Gigi
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Posted: Tue Jun 19, 2007 2:32 am Post subject: |
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Warren,
Earlier you asked me what I thought about the Torqeedo...I was waiting for the Navagear article to be put on line http://www.c-brats.com/viewtopic.php?t=6182&highlight=
Basically, the motor is very torquey and moves the boat well. Not spectacularly fast, but it can move two adults easily. The battery lasts a couple of hours and recharges easily. I do have an inverter (400 watts), but I've yet to use it to charge the batteries.
What I don't like is the throttle. Twist one way and it goes forward, twist the other it and it goes backward...that's fine but it is too easy to turn! There is no resistance it just twists so easily in your hand. I always seem to screw up also. I forget which way is forward and which is back and the slightest movement makes the torquey motor jerk me forward and backward.
It's probably me, but I find the tiller too long. Even at its shortest setting I find it difficult to make turns because my body is in the way. I use my right hand so turning left is easy, but turning right is hard.
Finally, to be honest I'm paranoid that if I leave it at the dinghy dock someone will just walk away with it! Or just take the $600 battery! There doesn't seem to be any way to secure it. A 26lb motor is light, until you feel obligated to carry it all day!!!!
I hope you found this helpful. |
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El and Bill
Joined: 08 Nov 2003 Posts: 3200 City/Region: Lakewood, CO
State or Province: CO
C-Dory Year: 2000
C-Dory Model: 22 Cruiser
Vessel Name: Halcyon
Photos: Halcyon
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Posted: Tue Jun 19, 2007 9:41 am Post subject: |
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Our collapsible oars stand upright in the port rear corner of the cockpit. _________________ El and Bill (former live-aboards)
Halcyon 2000 CD 22 Bought 2000 Sold 2012
http://cruisingamerica-halcyondays.com/ |
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Dreamer
Joined: 01 Jan 2006 Posts: 1764 City/Region: Really Sunny SaddleBrooke
State or Province: AZ
Photos: Dreamer
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Posted: Tue Jun 19, 2007 11:00 am Post subject: |
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Good one Bill & El! Simplify, Simplify.... _________________ Roger
Once a C-Brat, always a C-Brat
Dreamer- Sold 25 Feb. 2013 |
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