Posted by SJC on February 25, 2006, 10:28 pm
You could use a 12v tail light or head light bulb from an auto
parts store. If your panel produces say 10 amps at 12volts, you
can use a 20 amp fuse. A plastic or glass 20 amp fuse has some
fundamental resistance to cause heating and fuse action. You can
measure that resistance with a milliohm setting on a multimeter
and apply ohms law to see the power produced by the panel under
Posted by spinning on February 26, 2006, 11:21 pm
His panel is 20v not the more convienient 12v (he may need a DC-DC
converter). Also, measuring milliohms with a multimeter is inaccurate.
Besides, there would be ohmic heating in the fuse, so it's resistance
would change with current.
Posted by SJC on February 27, 2006, 5:46 am
Maybe the first message is incomplete, but it sounds like it measures
20 volts because it is not under load. The milliohm inaccuracy is not
that important, he just wants to know the power in general terms with
a given sun strength, as I read it.
Posted by nicksanspam on February 28, 2006, 11:22 am
Oops. Wrong newsgroup.