Solar Charger & Truck Power Question
I've recently installed a Go Power! GP-PWM-30 30 Amp Solar Regulator because the previous owner had solar installed but no charge controller (he just had a simple diode or voltage regulator that conne...
Forum Discussion
Sam Spade wrote:HMS Beagle wrote:
It is correct. Theoretically (and in unusual conditions) you can have current without voltage, and practically you can have very large currents with very little voltage.
The terms "voltage source" and "current source" are engineering terms.
The engineering terms are "constant voltage" and "constant current", indicating which parameter is regulated......as the load changes.
And you can NOT have current flow without voltage; you just CAN'T.
It is Ohms law and a zero in there gives a ZERO result.
"Constant voltage" and "constant current" are also engineering terms, just not the same ones and not the quite same meaning.
You can have very high currents with no voltage. In Ohms law a zero gives you an indeterminate result (I = V/R where V and R are zero). This is how superconducting magnets work. They aren't just in labs anymore, there are many industrial applications. I'm not suggesting that anyone has superconducting or tunneling technology in their camper, but in a camper, it is pretty easy to get a couple hundred amps with only a couple of tenths of voltage drop.
