To fishermen that fish electric motor only lakes: who has multiple trolling motors on your boat?

 is a 24v 70lb thrust substantially faster than a 12v 55lb? Quite a price difference between the two. 
I have a 36v-112lb up front, but I would like the added power and speed  for the transom. It's an 18ft g3 with extra goodies weighing it down. Thanks

A 70lb is much stronger, and will last much longer on the 24V system than a 55lb will on a 12V unless you run 2 batteries parallel.

I agree with @Bluebasser86

When I fished electric motor only tourneys we ran a 101 up front and an 80 in the back

Then I bit the bullet and we ran 2 101's on a 16 foot Crestliner

 

We did not pick up as much speed as i would have liked with the second 101

Probably the extra weight of the 6th battery and the 101

However, we ran around all over the place all day without ever having to worry about having enough juice to make it

I've got an electric boat. I've also got 6 trolling motors, all 35 lb ones. I've never put all six on but I have run 4 at a time and usually have two of them with 1 or 2 running. I find that (with the motors I have) turning on more motors doesn't really increase speed much. If you get 2 mph with one motor, two motors might raise it to 2.25 or 2.5 but it doesn't double the speed. But if a wind comes up they do let you push through it better. If you've got more weight, they do let you keep your speed up better. I guess you could say that more motors give more power but not velocity.

Electric motors aren't designed for speed of course, they hit a max according to the weight of your boat and resistant factors. They draw more current when that weight or resistance increases, and thus drain the batteries faster.

 

Just my experiences and I've not used higher thrust motors or higher voltage ones either. I would assume the concepts would hold though.

My friend runs one on the bow and one on the stern of his old 14' Alumacraft. The stern motor is for backing up when I get hung on something or we get too close to shore to run the bow when he gets hung.

If you really want to go fast and first class, you could always get a Torqeedo for your G3.  I've seen them on pontoon boats on an electric only lake around me.  20 hp should give you speed like you never experienced with a trolling motor or 4.

 

https://www.torqeedo.com/us/en-us/products/outboards/cruise

Those torqeedo's are sick! But they are expensive... thanks everyone for youre input. Much appreciated 

Run on a bunch of electric only lakes.  Below is my findings on a 175 Tracker over the last few years.

 

55 12V.  Max cruising speed of about 3mph.  Better have some extra battery power on windy days.

 

55 12V with 45 tiller on the transom.  Max speed of around 3.2 mph.  The tiller saved the big motor from being fired up a time or 2.

 

70lb 24v  Depending on load weight can hit over 4 mph.

 

70lb 24v with 2 45's on the transom.  Can hit over 4.5 mph in the right conditions.  The 2nd tiller is almost unnoticeable if left off. 

 

Weight and weight distribution can impact all of these speeds greatly. 

 

**Having the co angler move to the front of the boat when running can pick up .2-.4 MPH

Edited April 10, 20206 yr by WVU-SCPA
more info

I had a 24V Torqeedo Cruise 2.0 and it runs a 16' boat about 6mph.  If you use 2 100Ah lithiums you have a range of 20 miles depending on max speed.  A Torqueedo 10.0 will go about 13 mph.  A Torqeedo 4.0 about 7-8.  10.0 and 4.0 are 48V.  Other options are Ray Electrics and Elco.

Also, once you get a boat up over 6-7 mph, hull shape begins to make a big impact  A square flat bow is better than a V hull.  Less bow wave.  Once you get over 9 mph, move weight back in boat.  Below 8 you want the bow lower than back.  It all has to do with the bow wave,  Seems unintuitive, but it just works that way.