The Ford Barn - View Single Post - How difficult would it be to convert this water heater from 12V to 6V?

Synchro909 · 01-26-2021, 03:59 PM

[QUOTE=Badpuppy;1977827]Power is proportional to the square of current. Fans will run about 1/2 speed.

See nkaminar's post at #34.
Yes, power is proportional to current squared but consider this.
Resistance is volts divided by current and remains constant. Power is voltage multiplied by current.
Halve the voltage and the current is also halved (constant resistance). Looking at power in terms of current only, it is resistance by current squared. One half multiplied by one half is one quarter. The fan runs at 1/4 power.

01-26-2021, 03:59 PM	#35
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 7,497	Re: How difficult would it be to convert this water heater from 12V to 6V? [QUOTE=Badpuppy;1977827]Power is proportional to the square of current. Fans will run about 1/2 speed. See nkaminar's post at #34. Yes, power is proportional to current squared but consider this. Resistance is volts divided by current and remains constant. Power is voltage multiplied by current. Halve the voltage and the current is also halved (constant resistance). Looking at power in terms of current only, it is resistance by current squared. One half multiplied by one half is one quarter. The fan runs at 1/4 power. __________________ I'm part of the only ever generation with an analogue childhood and a digital adulthood.