wrote in message
oups.com...
... I have a question though: What does "two
group 27 Trojan batteries" mean? How many batteries
are we talking about here? How many in a group?

Two as in the number of batteries in series necessary to supply 24 volts
to
my 24 volt trolling motor. Group 27 is the size. Group 31 would be
larger.
Group 24 would smaller.

This means you have 4 batteries, and two in each group. This sounds
like more batteries than I have expected. May be I can make do with a
12-volt motor with 2 batteries (of course with a small rowboat, not a
20-ft boat).


I have no clue how you got that.


Two as in the number of batteries.

In series. That means conencted end to end.

Group 27 is the size. Has nothing to do with a group or number of
batteries.

Two 12 volt (group/size 27) batteries connected in series provides 24 volts
adequate for using the 65 Lb thrust trolling motor on my 16 foot boat all
day.

On my 20 boat I have three batteries connected in series to provide 36 volts
to my 109 lb trolling motor.

(See the pattern here?)

In your case if you found that a single battery was in adequate to power
your 12 volt trolling motor as long as you need you could add a second
identical battery in parrellel.

Two 12 volt batteries in parrallel will still give you 12 volts, but you
will have increased capacity.


--
Bob La Londe

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