On 11/5/20 6:48 AM, Phil Allison wrote:
major wrote:

===============


Sorry, the meters are a GE2524 Digital Multimeter that reads the 9V and
the other meter is a Etek 10709 that reads 4 V.

Not sure about dimmer frequency, but I can hear a faint whine as it runs.


** What range are you using ???

AC volts or DC volts?

DC on both meters on lowest range, 20 V.


PWM voltage waves can be read as an average value on any DC meter - but true power will require something much fancier.

Why not just measure the DC battery current and multiply by the voltage?


If you mean input from the battery into the dimmer, yes, tried that.
Both meters show the same 12 VDC @ 7 A when the dimmer is set at
maximum. Will have to check and see what happens as dimmer is adjusted.


Then subtract a watt or so for losses in the controller.

Would I only lose a watt or two through the dimmer? If so, I guess I
could take all my readings from the input side and go with those.



.... Phil