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Joined: Feb 2001
Posts: 7,985
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2001
Posts: 7,985 |
KRP here in AK $ 500 plus for a 60 AMP HR Lithium and you cant ship them here
kk alaska
Alaska 7 months of winter then 5 months of tourists
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Joined: Jan 2005
Posts: 17,085 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jan 2005
Posts: 17,085 Likes: 2 |
KRP here in AK $ 500 plus for a 60 AMP HR Lithium and you cant ship them here That's the chits for sure. Kent
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Joined: Jan 2006
Posts: 69,480 Likes: 18
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2006
Posts: 69,480 Likes: 18 |
Something else to consider - how much do you use the boat? A lithium will hold it's charge in storage for much longer so it doesn't need a trickle charger. On the other hand, if you aren't using it a lot, it's hard to spend the money for lithium. If you take the battery out to charge it, a 100A lithium only weighs 25lb, half what a lead battery weighs. A lithium can be used in any position, even upside down.
If you decide on a Li, NOCO Genius makes some really good chargers with Li settings. I have a Genius 5 that works great. I wouldn't go with the Genius 2. It's just too slow. The 10 would be great but it does cost another $30. We have a camp trailer with Li batteries. I bought a 20A dedicated Li charger for it and hardwired it in. It's very fast but it can't be used for other types like the Genius can.
“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell
It's not over when you lose. It's over when you quit.
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Joined: Jan 2005
Posts: 17,085 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jan 2005
Posts: 17,085 Likes: 2 |
The 100 dollar lead batteries are mainly 35ah, a 100ah deep cell lead is about 200 bucks, can be charged 700 times and lose capacity before that, can only use 50% before charging, takes about 5hrs to recharge, weighs 50lbs.
Probably closest thing in lithium to the Walmart special is the 50ah. Cost about 160.00, can be charged at least 2500 times before losing capacity, another 1000 or so before it gets chitty... I don't believe the 10,000 charge claims. Charges in about an hour, over twice the power time, weighs 13lbs.
A 24ah lithium would have more power time than a 35ah lead, weigh 7lbs and be damn handy in a small boat, for about 30 bucks more than the lead.
If I needed it in cold weather, I'd figure a way to run wires into a small cooler to keep it insulated while using/charging.
Here in Az with the heat, lead deep cell batteries seldom last more than a couple years before they degrade to the point of diminishing returns on usable capacity.
It would take almost 6 35ah lead batteries to equal the usable capacity of 1 100ah lithium, or 2 of the 100ah lead batteries, at 400 bucks vs 300 bucks of 1 lithium. Plus you get about 4 times the life cycle out of the lithium.
It's no contest.
Kent
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Joined: Feb 2010
Posts: 16,137 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 16,137 Likes: 2 |
Is it OK to use that same deep cycle battery to electric start your little 15 hp outboard on your 14 foot aluminum boat and also run your lights, etc?? I remember back in the day most recommendations were to have a separate starting battery in addition to a deep cycle battery. I think now the deep cycles and starting batteries are one and the same thing , Is this correct? I once had a small jon boat with a 10hp outboard. I used only one deep cycle battery to crank the motor and run the trolling motor. I charged it with a cheap box type battery charger. You don’t need to spend $1000+ on this unless you just like throwing money away.
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Joined: Feb 2013
Posts: 21,939 Likes: 12
Campfire Ranger
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Campfire Ranger
Joined: Feb 2013
Posts: 21,939 Likes: 12 |
The 100 dollar lead batteries are mainly 35ah, a 100ah deep cell lead is about 200 bucks, can be charged 700 times and lose capacity before that, can only use 50% before charging, takes about 5hrs to recharge, weighs 50lbs.
Probably closest thing in lithium to the Walmart special is the 50ah. Cost about 160.00, can be charged at least 2500 times before losing capacity, another 1000 or so before it gets chitty... I don't believe the 10,000 charge claims. Charges in about an hour, over twice the power time, weighs 13lbs.
A 24ah lithium would have more power time than a 35ah lead, weigh 7lbs and be damn handy in a small boat, for about 30 bucks more than the lead.
If I needed it in cold weather, I'd figure a way to run wires into a small cooler to keep it insulated while using/charging.
Here in Az with the heat, lead deep cell batteries seldom last more than a couple years before they degrade to the point of diminishing returns on usable capacity.
It would take almost 6 35ah lead batteries to equal the usable capacity of 1 100ah lithium, or 2 of the 100ah lead batteries, at 400 bucks vs 300 bucks of 1 lithium. Plus you get about 4 times the life cycle out of the lithium.
It's no contest.
Kent Thanks... that is good data to know for my various projects.
If you are not actively engaging EVERY enemy you encounter... you are allowing another to fight for you... and that is cowardice... plain and simple.
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Joined: Feb 2010
Posts: 3,843
Campfire Tracker
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Campfire Tracker
Joined: Feb 2010
Posts: 3,843 |
100ah lithium batteries are about 300 bucks now, only way to go.
Kent This is what I plan to do. I also have a 300W inverter so I can use it to run my furnace during a power outage. Good luck with that. You’ll get 2-6 hrs of run time at best, depending on the size of the blower motor. That’s if you can even start the motor with such a small inverter. 250W blower. 2-4 hours of heat would be a huge improvement. Plus I can recharge it with my generator.
Quando omni flunkus moritati
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Joined: Feb 2006
Posts: 1,580
Campfire Regular
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Campfire Regular
Joined: Feb 2006
Posts: 1,580 |
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Joined: Feb 2010
Posts: 3,843
Campfire Tracker
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Campfire Tracker
Joined: Feb 2010
Posts: 3,843 |
Is it OK to use that same deep cycle battery to electric start your little 15 hp outboard on your 14 foot aluminum boat and also run your lights, etc?? It will work but your outboard alternator will have a big effect on how long the battery will last. I wouldn't use a lithium battery for the same purpose as they require a special charger. My outboard is unregulated so it can hit 17v at full throttle which is very hard on batteries.
Quando omni flunkus moritati
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Joined: Jan 2003
Posts: 2,827
Campfire Regular
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Campfire Regular
Joined: Jan 2003
Posts: 2,827 |
I bought four new batteries in the last two weeks for boats. The 100 dollar Walmart batteries were giving out. I thought "wow I just bought those a couple years ago" and the sticker on them when I pulled them out read 4/18.
I went and bought more of them. Five years is super good I think.
"Miss Jean Louise, stand up. Your father's passin.'"
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Joined: Jan 2005
Posts: 17,085 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jan 2005
Posts: 17,085 Likes: 2 |
The Walmart special isn't 109ah... notice they don't show the reserve capacity.
A Duralast of the same price point is 130 minute reserve capacity, which equals about 50ah, the Duralast Gold at 150 bucks equals about 65ah. That's the absolute max usable and not realistic, running it down to about 10.5 volts, you will destroy a lead battery running it down to those levels repeatedly in a year or two.
A lithium battery holds over 12v all the way down to 10% and then just shuts off, no damage.
Kent
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Joined: Mar 2006
Posts: 20,940 Likes: 3
Campfire Ranger
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Campfire Ranger
Joined: Mar 2006
Posts: 20,940 Likes: 3 |
A lithium battery will discharge to a point & then cut off. A lead/acid will go until it cannot any more. Depends on how far from the bank you are when it happens.
By the way, in case you missed it, Jeremiah was a bullfrog.
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Joined: Jan 2005
Posts: 17,085 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jan 2005
Posts: 17,085 Likes: 2 |
Reserve capacity on a 27 everstart walmart special is 65 minutes... equals 27ah.
Kent
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Joined: Jan 2008
Posts: 15,775 Likes: 1
Campfire Ranger
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OP
Campfire Ranger
Joined: Jan 2008
Posts: 15,775 Likes: 1 |
Jeebus. Didn't know I needed a degree in engineering to buy a damn battery.
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Joined: Jan 2006
Posts: 69,480 Likes: 18
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2006
Posts: 69,480 Likes: 18 |
Jeebus. Didn't know I needed a degree in engineering to buy a damn battery. It takes some learning to get the best for your needs and your money. It's kind of like finding a wife. You can get by with any old thing but finding a wife that best fits your needs and your budget takes some looking.
“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell
It's not over when you lose. It's over when you quit.
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Joined: Feb 2006
Posts: 1,416
Campfire Regular
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Campfire Regular
Joined: Feb 2006
Posts: 1,416 |
I bought 2 new Interstate factory blem AGM deep cycle batteries for $65 OTD each with core and they are 100 times better than standard flooded deep cycle batteries. I don’t have any experience with lithium but from what I’ve read and heard they are currently the best option and likely the way I’ll go with the solar and battery backup. If I could find a deal like that, I would jump on it! I have been looking at the lithiums on Amazon for my boat. I have two big Trojans that I need to replace. (24V trolling motor) At $800 ea for lithium, I wouldn't do it, but at $300, I am considering it. They are supposed to last a lot longer, but being made of chinesium, who knows? Can you trust a 10 yr warranty from them? The weight factor is a big one for me. Moving those 60 lb bricks around isn't getting any easier. Jerry
Minnesota; Land of 10,000 Taxes
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Joined: Jan 2005
Posts: 17,085 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jan 2005
Posts: 17,085 Likes: 2 |
Jeebus. Didn't know I needed a degree in engineering to buy a damn battery. You can buy whatever you want, just some of us have been through it all... batteries, generators, charging, losing power, You can go down to walmart and buy a battery that will last an 2 hours trolling, weighs 50lbs and takes 6 hours to recharge, if you want. But you did ask... Kent
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Joined: Jan 2003
Posts: 2,827
Campfire Regular
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Campfire Regular
Joined: Jan 2003
Posts: 2,827 |
I need a two bank battery charger for an open boat, can anyone recommend one?
"Miss Jean Louise, stand up. Your father's passin.'"
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Joined: Jan 2005
Posts: 17,085 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jan 2005
Posts: 17,085 Likes: 2 |
I bought 2 new Interstate factory blem AGM deep cycle batteries for $65 OTD each with core and they are 100 times better than standard flooded deep cycle batteries. I don’t have any experience with lithium but from what I’ve read and heard they are currently the best option and likely the way I’ll go with the solar and battery backup. If I could find a deal like that, I would jump on it! I have been looking at the lithiums on Amazon for my boat. I have two big Trojans that I need to replace. (24V trolling motor) At $800 ea for lithium, I wouldn't do it, but at $300, I am considering it. They are supposed to last a lot longer, but being made of chinesium, who knows? Can you trust a 10 yr warranty from them? The weight factor is a big one for me. Moving those 60 lb bricks around isn't getting any easier. Jerry They make 24, 36, 48v one unit batteries... 24v will probably be 6 to 700 bucks. Kent
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