Please help with troller mystery

keninaz

Chief Petty Officer
Joined
Dec 15, 2010
Messages
448
Re: Please help with troller mystery

It does not matter unless you parallel the two at the same time which I would not do.
One group size will have more capacity than a different type and you don't want to run them together for that reason as one will deplete before the other. And you could dmage the lessor capacity battery in the process.
For that reason you would normally not parallel even the same group sizes together unless they are the same size, capacity and age.
You can run different sizes on the A/B switch one at a time without problem however.

And just a note, you installed a 50 amp CB again which is close to what the current levels can be for top speed and heavy load on your motor. In my opinion you are running it too close to maximum which will cause premature failure if you are in the habit of running your motor at full power. I would estimate your motor is running 46 amps at max thrust and high speed.
Correctly you should have put a 60 amp on it to give it some room to breath and prevent thermal problems in the future.
When I worked electrical typically we built circuits to run about 80% of the rated load on a breaker.
 

John_S

Rear Admiral
Joined
Jun 21, 2004
Messages
4,269
Re: Please help with troller mystery

I agree with not putting the batteries in parrellel. Do not upgrade your circuit breaker until you know if the wires can take the additional current. You don't want to trade a circuit breaker for melted wires. Check your Motorguide recommendations, but for the Wireless series (all thrust models, 12V and 24V): 6ga wire and 50amp breaker is what is called out. If it is a long wire run, then it might require larger diameter wire.
 

gwood

Seaman Apprentice
Joined
May 10, 2010
Messages
34
Re: Please help with troller mystery

The recommended CB is 50amps and it is 8 awg installed on the TM. While installing the CB and having read many other threads I did re-wire the 2 batteries with marine 6 awg with crimped connections and shrink wrapped joints, previous connections were automotive battery cables, the TM wire probably runs about 10 - 12 feet.
 
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