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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #11  
Old 01-22-2009
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A small 25-50 watt solar panel and good charge controller will go a long way to keeping the batteries in decent condition if you keep the boat on a mooring.

Quote:
Originally Posted by tager View Post
If you want a fridge, get a fridge, but here are my suggestions;

Get a propane (or other fuel) fridge, electric ones will KILL your batteries fast.

Or just jam your needs-to-be refrigerated stuff in an icebox in the lowest part of the bilge. You will have ice for a week around here. (PNW winter)
You must not know a whole lot about the non-electric, non-engine powered fridges. They're not designed to be used on most boats, since they NEED TO BE LEVEL to operate safely. They can be used on multihulls, and are stock equipment on some catamarans... but they are not suitable for a 21' monohull.
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  #12  
Old 01-25-2009
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well, for an update. I've picked the 12 volt bible clean and even found a video at a library close by that used the book as a reference. So far here is the plan...I know I have a small boat, BUT regardless I am going to go with a 400AH battery bank. I have 2 100ah deep cycle batteries now (optima blue top...supposedly good for 350 cycle charges from 0% to 100% but I won't let it get below 50% anyways so....yeah) I am going to get two more. I am refitting the boat with an Ice box. the original ice box was side door...And from my understanding cool air sinks...doesn't make much sense to let moisture rich cool air come out every time I open it so I got a template for a top feed ice box. I am going to wire the batteries together using the positive side and from my understanding it will stay at the 12 volt range but add together the collective amp hours together...and Im all for that. The only major power draw I will be using is my laptop but Im running nav software on it too...I think i am just going to retrofit a dc to ac converter (like for a car) for now until I can set aside time to learn AC....im leaving that alone till I get a better understanding. I won't be using but 2 lights on the boat and the laptop when moored. I AM looking at getting a decent water turbine in a few months cause some brands can be converted to wind when moored. I replaced my outboards alternator with a 110 amp smart regulated alternator and I should be able to get roughly 60 ah back a day from that by running the engine for an hour or so...either way all is well I think with this plan I should be able to keep my usage down to about 50 AH a day. thats my plan. Hope I am making some headway....some input on this setup would be nice. I have plenty of room on the boat as far as storage for fuel and maybe in the future a generator for emergencies...
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  #13  
Old 01-25-2009
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Quote:
Originally Posted by 21feetofnewb View Post
..... I replaced my outboards alternator with a 110 amp smart regulated alternator and I should be able to get roughly 60 ah back a day from that by running the engine for an hour or so...
Wow....I'd love to see a picture of that :-)

Bill
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  #14  
Old 01-26-2009
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Quote:
Originally Posted by btrayfors View Post
Wow....I'd love to see a picture of that :-)

Bill
Me too...I suspect a typo!
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  #15  
Old 01-26-2009
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This must be a pretty wide and deep boat to fit 400Ah of battery on board as well as a large supply of fuel. I'm trying to figure out how to fit a 3rd Group 27 (height restrictions) into my house bank and I'm on a 30 foot.

Could you post a photo of your outboard? I couldn't drive a 100A alternator with my Atomic 4 without causing belt problems.
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  #16  
Old 01-26-2009
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I'm putting 900 AHs (12v) made up of 6-6v AGMs batteries in a box about 22" square by 13" deep...I thought that was pretty small.
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  #17  
Old 01-26-2009
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I tried to find a picture of the inside of a Kells 21'. I did see the outside of a 23' and it probably similar.

I am working on a Santana 21' for my winter hobby time. Going to be my "Gunkholer".

I enjoy the challenge of making a small sailboat comfortable. Everything needs a place or I can not need or want it!

I placed an AGM battery down below on the starboard side for when I use a Trolling motor to move in and around the docks. Now the boat lists (Tilts) to the starboard side. So, I bought another AGM to even it up!

Just wanted to be sure you take into consideration weight distribution.

I wanted to keep the original Fuse panel as it has the company name inscribe on it. There are holes for up to 4 circuits (May add one more).

Three circuits are already labeled so I just keep as is. I have ordered new fuse/switch replacements. Will even have little lights to show when something turned on.

I will have Volt and AMP meters mounted above my panel for the $200-300 Blue Sea look at a cost of $54, excluding wires.

For myself, the electric will be experimental as I will have a small refrigerator (Waiting on some spec info now from the manufacturer) and central AC (air conditioner and highly experimental). These two may only work when tied to the umbilical cord at the dock. Lot of number crunching going on now.

My electric concerns will revolve around the trolling motor, refrigerator and AC. If not for playing around with these, I have all the electric I need. The trolling motor being the most important. I not want a Dinoburner engine! I want to smell and hear the sea.

I will have Red wires (Positive) and Black wires (Negative). I think the bilge pump I bought has white and brown wires, so there are a few cases of varied colors.

I wanted special lights below to make my boat different from the norm. Electroluminescent strips are what I want to experiment with and I will build a simple inverter to power them as 12-24 Volt DC not work. I have a few store bought inverters, a small 400W and a larger 3000W, but, can not learn if we not build it ourselves.

I may have some bright lights, maybe something for reading, but, they not what I plan to use for primary low amp lighting.

I will have some LED stuff for fun.

Will it all work? Will know by this summer, if, I can stay on schedule. It cold today so I sit in a warm home and e-mail companies for some numbers. No cell phone or inet at the remote boat dock.

The refrigerator for $150 +/- can be donated to a college student next fall if it not work. The $125 AC may be beyond help when it not work, which we (I have friends involved) think may be a flop. Space being more of a concern than the electric.

The 50W Solar panel will not be able to keep pace with the AH usage, but, we hope it give a little time before we have to reattach the umbilical cord.

We are looking at building a small wind generator from a treadmill motor (or something similar), maybe it help.

This all takes a lot of downloading manuals/schematics, reading and emailing companies for specs. Then actually going beyond my numbers and experimenting.

I hope the picture work to help with ideas of utilizing space. This a plastic tub from wal-wort. If, my measurements are correct, 3-4 of these will slide under my cockpit for storage. The first in is least used stuff and furthest back. Small rope attached to each one help pull them out. There is still some room to the side to slide my sculling oars.

Well I not good at explaining things and may not have actually helped. But, I was excited to see someone else wanting to fix up an old 21' sailboat and hope you get it all to work for you.

Old sailboats never die, they just get new poly tarp sails. Well mine may be canvas drop cloth. But, that's another long story that I may not be good at explaining.
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  #18  
Old 01-26-2009
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Ya know--

The more time we spend on my boat the less power we use.

A small battery powered boom box is more than enuff for a small boat.

Most of the light is provided by red led lights placed around the cabin for night sailing. A small oil lamp provides light for most everything else and it's light output can be adjusted high or low depending on you mood. Three 12v cabin lights are hardly used at all.

The vhf on listen draws verry little power.

We get into a habit of up at dawn and down at dark.

We may explore all day long just motoring and looking.

Sometimes winding up that 800# keel to get over skinny water or lowering the mast to get under that 13' bridge to go where few sailboats can.

Some days we just head off shore and chase the wind.

We provision for 3 days in two ice chests and after that we are ready for a trip ashore to restock.

The little 8hp outboard is equiped with a 6 amp charger that keeps the batteries top up when running at 1/4 throttle. Battery bank consists of 2 group 27 batteries the same as the tow truck uses (not deep cycle).

I also have a the charging system of the truck hooked to the boat to insure the batteries are fully toped off when we arrive at the launch ramp. A 2/30 charger is hard wired to replenish the batteries at the dock if we do that.
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Old 01-26-2009
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You have got an alternator, powered by an outboard, that can deliver 110 A continuous? without ending up in flames?
How does it cool?
The one on my ship is the size of a melon and is rated at 100 A continuous but man its appetite for cooling air is phenomenal.

Last edited by Rockter; 01-26-2009 at 06:38 PM.
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Old 01-26-2009
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I hadn't fitted the alternator on yet. I was having a friend that was going to help me fit a bracket together for it but there isnt enough room for ventilation and I think it will EAT belts so Im just going to start from scratch on my plans , make it bare bones and add things as I need them..I bought two 12volt 225AH batteries they weigh about 95 lbs each and I have them on bth sides of the boat. making it even lol there is a TON of storage on my boat. so is not a problem
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