Richard J Kinch wrote:
DSK writes:

Jeff is right, current consumption from a
battery bank is commonly (and correctly) measured in in
amp-hours, and this is the important spec to most boaters.


Amp-hours is a unit of charge, and not a unit of current.

Of course. Thank you for repeating what I said.

Charge is not current.

Of course.


It is nonsensical to specify current in amp-hours. It is
like asking what gas mileage a car gets, and responding,
"18 gallons".

However, when you specify current as Amp-hours/day, its perfectly
valid. In fact, it is the preferred way of stating it in this
situation. That is what is stated in the spec sheet. Its like
stating the number of gallons of gas used in an average year, assuming
a certain number of miles.

You inability to grasp this is in direct contradiction to your claim
of having a PhD in some field of physics or engineering.


Of course people use the term "current" to mean a vague or
naive notion of "electricity", such as "house current".
But this doesn't excuse a technical specification giving
a bogus value in nonsensical units.

Perhaps you should look at the spec sheet again:
http://www.avxcel.com/docs/TropiKool...5%20r 1.1.pdf

Right next to the label "Nominal current" is a little number "(2)" -
this is called a "foot note" - and if you look down a few lines you
find: "(2) Average current consumption for 12 VDC systems over 24-hour
period." In other words, the value listed is Amp-hours per day, a
perfectly fine measure of current.

It appears that the only bogus aspect to this discussion is your claim
of any knowledge in the area.



.... Amp-hours are not a measure
of current.

Also correct, but then nobody (except you) is stating such.


You just said, "current consumption ... correctly measured in amp-
hours".

As noted, its current consumption over a 24 hour period, or Amp-hours
per day.