tenbear wrote:
:Bkyle86 wrote:
I figured I would test it with a small 700w kureg coffee maker and see if it could take it. The darn thing drew over 62 amps---.
On my trimetric meter at the battery, it showed voltage dropped from 12.6 to 11.9. When I measured the voltage at the inverter terminal however it was only 11.35 volts. I am using 10 ft total of 6 gauge wire---.
Your original post said the the voltage dropped from 11.9v at the battery to 11.35v at the inverter. That's 0.55v volts being dissipated somewhere. You said the current was over 62A.
That means over 34 watts is being dissipated somewhere. 10' of #6 wire would cause a 0.24v drop, a loss of 14.88 watts so 20 watts is being dissipated somewhere else along the battery to inverter path.
How hot would a 20watt incandescent bulb get? That could get hot enough to cause a fire under worst case conditions.
Yes, I'm an old engineer.:B
So....... you are comparing say a 34 watt thin tungsten filament in a vacuum to 10 feet of insulated 6 guage wire? Realy?
I think the real issues are quality and duty cycle. As an example morningstars 300 watt suresine can be pushed to 600 watts for 10 minutes. and thats with a passive heatsink.
This is assuming the op is NOT running this load continuously, a few minuites of runtime isn't as likely to be an issue. That being said in electronics,"heat kills" I would suggest a pc type fan aimed at the back of the inverter that runs until you are done with coffee.
