[RE-wrenches] C-40 question

[Chris Mason]

It does "take". Your charge controller controls the load and current, hence
the name "controller". It is not a fixed resistance. If you program a
charge rate limit, the controller will control the current flow to limit
the charge rate, hence it is "taking" a certain current up to the limit of
the source's ability to supply that current but not above, regardless of
the size of the array.

On Wed, Oct 24, 2012 at 10:17 PM, Richard L Ratico <
Richard.L.Ratico at valley.net> wrote:

> Huh? The equipment does not "take" or "draw" anything. The electrical
> pressure
> of the source, called voltage, forces electrons through the load.
> Electrons per
> unit time are called current. The current is only limited by the
> resistance of
> the load, in accord with Ohms Law. The resistance of the load acts as a
> valve or
> choke point in the circuit, thus limiting the current. In the case Allan
> describes, the battery is the primary resistance in the circuit. If the
> battery
> was large enough and, or, sufficiently discharged (low resistance), and the
> source could provide enough current, the C-40 would "Toast".
>
> Dick Ratico
>
> --- You wrote:
> Because it is not 80 amps current flowing, it is a capacity of 80 amps.
> Think of it this way. Your toaster is plugged into an outlet that is
> powered by the grid. The grid has infinite capacity. Why doesn't your
> toaster explode? Because it takes the current it needs. Now, increase the
> voltage and you may have a runaway current situation, but at the design
> voltage the equipment takes the current it needs up to the limit if the
> supply.
> --- end of quote ---
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-- 
Chris Mason
President, Comet Systems Ltd
www.cometenergysystems.com
Cell: 264.235.5670
Skype: netconcepts
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