Have just aquired a Minn Kota 30lb thrust electric motor for my 3.4mt tinny to poke in and around snags chasing cod and was wondering what sort of battery I should be using. I would only have the electric motor on for max 4 hours in any one fishing trip. Would one of those batery packs do the job? Any advise would be great.
Regards
Schulzy
i'd be looking into a deep cycle battery.
What do you mean 'battery pack'?
As Local Guy said, you will need a deep cycle battery, preferably marine grade because they are designed to withstand the pounding that boats get. You'd probably get away with a 100 amp hour for that motor and tinnie for that duration.
Any longer or if you are planning on heading into tidal areas with strong currents and you'd need a bigger battery.
Make sure you get a decent multi stage charger too. Shop around and you should find a decent quality 100AH battery and MS charger for around $200 - $250.
I use an 80 amp hour deep cycle gel cell battery with my 55lb bowmount and can use it all day with no problems, so a 100 amp hour will be more than enough.
Cheers
John
Type3 dispite being told i needed a deep cycle battery, i took the cheap road and bought a standard car battery. Like you, I wouldnt use the leccie for more than 4 hours, used it last weekend trolling for a solid 3 hours without a break. In that time I noticed no loss of power from the leccie, suggesting to me that the battery was coping fine with the load. Its a BM44 Watersnake on a Stacer 3.8m Kipper
I also used it extensively, but in much shorter bursts, on a recent trip to the Glenelg River. All I did was ensure that the battery was put on charge after every day.
I've only been using the set up for around a month, but as yet am seeing no noticable loss of performamnce from the battery in that time.
mate no offence but i dont know wat ur doing with you leccy if you think that he needs more than a 100amp battery to power a 30lb thrustOriginally Posted by plaztix
a 55 pound thrust draws about 45 amps and hour and that is at full speed for and hour when its just from spot to spot or a lil bit of trolling it draws around 23 amps an hour. you could even get away with a marine pro batterry 400 because it is a small boat and would be quite light i imagine plus the motor itself will run on the 400 for at least 4 hours full speed. stop and start you'll get a day
regards jason
Coontakinta, It may seem cheap at the time to go with the car battery but you will go through 4 cheap batteries in the same amount of time you could expect from 1 deep cycle marine battery designed for this purpose.
A normal 'cranking' battery is not designed to be depleted of a large amount of its charge then rapidly re charged. They are designed to provide a short sharp burst of power (ie cranking a starter motor) and then topped up immediately.
Your battery will last a little while and you may not have noticed much difference yet (you've only had it for a month) but it is dying alreadyand you will be back at the battery shop shortly.
Go deep cycle this time.
A marine battery is also advisable if its going to be used anywhere where you will be pounding through waves/chop, because standard battery plates are not designed to handle the vibrations most boats are exposed too.
OK JJT, Go ahead, recommend a non deep cycle, cranking battery that will do the trick for now, but i'm sure it will be in the tip like coontakinta's car battery in a year(maybe even less for coontakinta's, sorry mate
)
My 50lb draws just under 50 amps at full throttle (i've tested it), so i don't know where you got the 45 amps from a 55lb. My guess, marketing hype created by some clueless salesman who put a meter on a motor that was rigged up in the showroom and was free spinning with no resistance against the propThings are very different in the real world on the back of a boat, with water at the prop and wind, current etc. etc.
Cranking batteries should not be heavily discharged and it is adviseable to only use 60% of a deep cycle batteries full cycle.
A basic rule of thumb is 1 amp drawn per lb of thrust. therefore a 30lb motor should draw approx. 30 amps (at full throttle).
Effectively (with a 100AH DC battery) this only gives you 2 hours of useable cycle before you are doing irreversible damage to the battery. Sure not everyone gets around at full throttle all day but its always better to go larger than required and not just get what is just enough. As the longer you have a leccie, the more you use it, the more you depend on it.
Thats my 2 cents , buy whatever Shulzy, its not my money
Looks like I might need to save some coin for a new battery and charger
plaztix i think your theory is flawed
from my calculations my 80lb minn Kota would draw 80 amps at full
dont think so
where did you get your info from?????
A 30lber draws 30amp / h flat stick
A 55lber is 50amp / hr
A 70lber is 42amp / hr
A 80lber is 56amp / hr
You should always buy a deep cycle battery for leccys ..... not a cranking battery!
for a 30lber .... I'd be buying a 100amp minimum ........ That way the battery will last longer from not being drawn right down each trip ....... charge it with a 2 or 3 stage charger ( like a Minn Kota charger )
Nagg
As i said its 'a basic rule of thumb.' It doesn't relate so well to larger motors but we're talking a 30lber here.
'Where did i get my info', exactly what info are you talking about? The majority of it is from years of 4WD ing / camping / boating with a mate who's an auto electrician (the most useful mate i ever had for boating electronics and he moved to Gladstone before i got my own boat
The rest is common sense and lots of testing and trialing in different applications. Or do you need a reference?
Nagg's is on the money, I've never tested a motor over 55lb so its interesting to see how efficient they get.
Hi all,
I am looking to replace my batteries for my 65lb rip tide. Currently using 2 deep cycle. I have been to two battery places and I have been getting different options.
So does anyone use the remco 100 amp batteries? Or do you guys think I should stick with deep cycle?
I use it for both impoundment and blue water work mainly soft plastics etc- probably anywhere from 4 - 5 hours use sometimes 7 hours depending on what I am chasing.
I run Sonnenschein 80's for both my sounder/downriggers & seperate for my lekky.
Why anyone would use anything else is beyond me as these are the only batteries I'm personally aware of that can be discharged to buggerall & go the distance.
Haze batteries are also very good but not in the same league.
Initially you may save a few bucks on car, lead & other batteries but in the long run had you initially purchased Sonnys you'd be leaps & bounds ahead.
Only my humble opinion, keep up the good work.
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