Leccy help

[odieman150]

Hi all I have just purchased a 24 volt Kota for my boat but really need help with what batteries I need. I was thinking 2x120ah but have been told that 2x90ah would still give heaps of run time. Your thoughts and experience would be appreciated. Thanks Polyphonic

[bowds13]

Hey mate, do a quick search. There has been a few threads covering this recently.

cheers

[odieman150]

Thanks will do.

[NArmstrong]

Get the biggest you can. Better to drain ur batteries to 60% than 40%. I would say 2x 105's min

[odieman150]

Well guys I have been searching everywhere and probably no smarter than I was a few days ago about amp draw/power curve/watts/amp hours or whether it will rain tomorrow :):) Can anyone please give me an estimation on the run time difference between say 2x90ha batteries as opposed to 120ah batteries on an 80lb minn kota would really appreciate your input. thank polyphonic

[rayken1938]

how long is a bit of string?
Simplicity put.
In theory a 90a/h battery will supply a current of one amp for 90 hours
a 125 a/h battery will supply one amp for 125 hours.
a 80 lb kota draws 56 amps at full power so you divide 56 amps into the battery capacity.
you then have to consider that you NEVER EVER discharge a battery below 11.8volts
I never discharge my battery's below 12 volts to maximise their life.
Have a look at this site for additional reading
http://www.energymatters.com.au/renewable-energy/batteries/battery-voltage-discharge.php
Cheers
Ray

[aussiebasser]

Also remember while you double the voltage with two batteries, the amp hours remain the same. If you're going on an electric only dam, take a minimum of 130ah, and always have a spare.

[rayken1938]

I run a 80 lb i-pilot powered by 2 X 150 a/h batterys in series to give 24v.
Today at NPD i traveled from the ramp to the island and back a total distance of aprox 10k.The travel time just over an hour including time to do a couple of shrimp traps and whilst fishing for around 3 to 4 hours using the spot lock to hold position in quite a bit of breeze.
When I got home the battery voltage was 12.4 volts per battery. Unless you are going to travel long distances at full throttle you should get a days fishing if you either use the spot lock or just troll at 2 to 3kph at 2kph the motor will only draw around 30 amps or less.
When on spot lock the remote shows what power rating the motor is using on a scale of 1 to 10. Today in a 10 to 15kph wind it rarely went over 4,
Cheers
Ray

[odieman150]

Thanks for all that info guys I do appreciate your input :)

[odieman150]

Yet another question guys, has anyone who has set up solar for their bow mount batteries give me a ball park figure on the cost of it. Much appreciated.

[rayken1938]

So you mean for charging whilst boat at home or on the water.
If on water totally impractical as bo where enough output from panels to replace what charge you will use.
Cheers
Ray