T-Pain Is On A Boat: RE: [Electric Boats] Re: conversion performance

Saturday, January 30, 2016

RE: [Electric Boats] Re: conversion performance

what kind of dweeb would complain that the posting isn't in watts if both volts and amps is posted? i'm as ignorant of electrical engineering as anyone and i can convert volts/amps to watts if i need to.

the most useful info i'm finding is from those who build the simplest, most efficient systems that allow one to convert a sailboat to electric propulsion. often, that is from amateurs like me.

"Why did you wish me milder? Would you have me false to my nature? Rather, say I play the man I am." Coriolanus, W. Shakespeare

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On Thu, 1/28/16, tkgc9 tkgc9@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:

Subject: RE: [Electric Boats] Re: conversion performance

To: electricboats@yahoogroups.com
Date: Thursday, January 28, 2016, 5:19 PM

SERIOUSLY I though all I had to do was
crank her up and haul ass.Jezzz what a bunch of
jerks.To the one guy who thanked me for posting
my info," your welcome."To the rest of
uall either post up data from your boat or shut
up.-------- Original
message --------From: king_of_neworleans
<no_reply@yahoogroups.com> Date: 1/28/2016
6:08 PM (GMT-06:00) To:
electricboats@yahoogroups.com Subject: RE:
[Electric Boats] Re: conversion performance

Watts is easy if you know your voltage and current.
48v x 10a would be 480w, for instance. Watts is power. Watts
can be more or less converted to theoretical horsepower.
Amps is current. Volts is, er, voltage. 480w x 2hr would be
960 w/hrs. 220ah at 48v would be 10.6 kw/hr which would be a
measure of capacity. The thing is, someone might have a 48v
system and someone else might have 72, or 96, or 120 or
144v, and just saying 10a or 30a or whatever would be very
uninformative. Simply multiply voltage x current to get
power. Or at least prominently state your system voltage as
well as current.

Think of a
wire as a pipe, for electricity. Voltage is sort of like
pressure. Current is sort of like flow rate. Power is like
the total force of electricity available to get some work
done. Then there is resistance, which is sort of like how
small the pipe is. More resistance at the same voltage gives
less current. And so forth. The basics are really not that
hard to grasp. You should at least be comfortable doing
Ohm's law calculations and converting kw to horsepower,
and estimating how long your battery bank will power your
boat. How to select a fuse or a circuit breaker. How to
select the proper size wire. You don't have to be able
to design your own controller, but some basic electrical
knowledge is essential and easy to learn.

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