KD4UPL wrote:
The rating of a charger isn't a guarantee that it will always put out that amount of current. It's the maximum rating the device should be run at. Typically you should only run an electrical circuit/device at 80% output if a continuous load and solar is defined by the NEC as a continuous load.
It's also not a guarantee that the unit will put out a given amperage regardless of voltage. A very depleted battery could very well be charging down around 12v or so. A 390w array would make 30A if that was the output voltage.
I don't see any deception, just simplification. They can't possibly state the amperage output for every possible voltage and wattage combination.
It's up to the thinking individual to take the ratings given, do some math, and come up with a proper design.
