Battery for boat

[zulu66]

Hi Guys

stupid question, but wanting to try save weight on boat. So thought I would ask this, I have 3 deep cycle batteries(120amp, weighs 30kg) on boat, 2 run as 24V for my trolling motor

Then have another deep cycle - 120amp, that I connect to my outboard motor, my lowrance fish finder and my electronics on the boat

as this battery weighs 30kg, I wanted to get a normal car battery etc or a smaller battery.

is this advisable or not? what I run from this battery is minimal for power....

any thoughts would be great

thanks

[Riprap]

Hey Zulu.

Step 1: Determine the CCA (cold cranking amps) required for efficient starting of your outboard.
Step 2: Determine the amps draw for your radios, sounder, aerator, bilge, well pump, lights etc at worst case scenario.
Step 3: Look at the charging rate of your alternator worst case scenario (assume a trolling motor dam only......)

That should help if you want to be precise.

Oh and the minimum reserve before you damage the battery - worst case scenario.

[zulu66]

thanks, will check that out

[Rory]

Safer to try pack a few kgs less k@k....that big old thing is on there for a reason....

[zulu66]

ja, what other kak can get I get off my boat....so save sum kgs...
less tackle? less beer?

try pack as light as possible

[Navrik]

I recently invested in a set of Discover 85Ah deep cycle batteries that outperform other brand's 100-105Ah models.

Very happy with them and saved me around 3kg on each of the batteries.

We were so impressed with the batteries that we built a battery backups system for a call centre with the same 85Ah models.

[zulu66]

thanks, where did you get those from and what did they weigh?

[Riprap]

Morning Zulu.

Read this: <!-- l --><a class="postlink-local" href="http://www.bassfishing.co.za/bassingnews/viewtopic.php?f=5&t=11492&hilit=batteries" onclick="window.open(this.href);return false;">viewtopic.php?f=5&t=11492&hilit=batteries</a><!-- l -->

Don't chuck off vital fishing equipment, rather look at banting.........

[Smiley]

Its best to get a deep cycle battery as you don't use your boat everyday. I bought a small exide deep cycle battery for my boat for R800 and starts one shot everytime.

[Fishton]

Discover Batteries by Enertec are the best I have ever used.

The little 33Ah runs my training boat for an entire day with more to spare.

[Navrik]

Discover 85Ah is 24kg and your typcial 105Ah is around 27kg. 6kg saving when using a 24V system.

We brough mine down from a distributor in Jhb. I think they are called Current Automation