Elect. Guru help - Kayak Fishing Adventures on Big Water’s Edge

PescadorPete · 05-06-2013, 10:21 PM

Greg,
I measured the Hobie bank tank pump (Tsuanmi 500) with no load (no water in the tank).

12V --> 0.32 amps 3.84 watts
6V --> 0.23 amps 1.38 watts

so roughly 40% of the power @6V vs. 12V.

I can measure it with a full tank of water this weekend if it helps, let me know.

BTW, Ohms law is not the way to look at this, its an inductive motor load, not a resistor.

Pete

GregAndrew · 05-10-2013, 04:47 AM

Hey Pete, how did you measure it, and did you happen to measure it with water? Looks like the batteries are going to be very affordable for LifePo4.

Quote:

Originally Posted by PescadorPete

Greg,
I measured the Hobie bank tank pump (Tsuanmi 500) with no load (no water in the tank).

12V --> 0.32 amps 3.84 watts
6V --> 0.23 amps 1.38 watts

so roughly 40% of the power @6V vs. 12V.

I can measure it with a full tank of water this weekend if it helps, let me know.

BTW, Ohms law is not the way to look at this, its an inductive motor load, not a resistor.

Pete

jruiz · 05-10-2013, 08:56 AM

Quote:

Originally Posted by GregAndrew

Hey Pete, how did you measure it, and did you happen to measure it with water? Looks like the batteries are going to be very affordable for LifePo4.

Here are the specs on the same pump under load for 12V and 13.6V. 1.4A current draw at 12V. So it should be less than that for 6V

PescadorPete · 05-12-2013, 11:51 AM

Here it is with a Hobie bait tank, full of water, pump under load:

12V --> 1.37A
11V --> 1.20A
10V --> 1.06A
9V --> 0.91A
8V --> 0.77A
7V --> 0.64A
6V --> 0.52A
5V --> 0.39A

Good thing I did this. When I had the tank full, I noticed the front seam is split and leaking

. Not from abuse, maybe a manufacturing defect? Time to get out the 5200.

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05-06-2013, 10:21 PM	#1
PescadorPete Senior Member Join Date: Mar 2005 Location: Leucadia, CA Posts: 261	Greg, I measured the Hobie bank tank pump (Tsuanmi 500) with no load (no water in the tank). 12V --> 0.32 amps 3.84 watts 6V --> 0.23 amps 1.38 watts so roughly 40% of the power @6V vs. 12V. I can measure it with a full tank of water this weekend if it helps, let me know. BTW, Ohms law is not the way to look at this, its an inductive motor load, not a resistor. Pete

05-12-2013, 11:51 AM	#4
PescadorPete Senior Member Join Date: Mar 2005 Location: Leucadia, CA Posts: 261	Here it is with a Hobie bait tank, full of water, pump under load: 12V --> 1.37A 11V --> 1.20A 10V --> 1.06A 9V --> 0.91A 8V --> 0.77A 7V --> 0.64A 6V --> 0.52A 5V --> 0.39A Good thing I did this. When I had the tank full, I noticed the front seam is split and leaking . Not from abuse, maybe a manufacturing defect? Time to get out the 5200.