This video will be about setting up the
solar panel experiments for the STELR Renewable Energy program. Here we have
our solar panel. It has four cells on it. There’s a schematic down the front here
which shows you which cell is which. And each cell has a positive and negative
terminal. We need a light source and we can’t always go out into the bright
sunshine, so we need our power supply and we’ve got two lamps so that we can get
an even spread of light across the four panels. To connect them up, take the
terminals and you put them into the 12V socket and the 0 V socket. And the
second lamp, we piggyback that in. And we can put those onto the panel like that.
We can then check each of these solar cells. So we’ll need a voltmeter to do
that. So we’ve got our STELR multimeter here. The black terminal goes into the
common and because we’re measuring voltage we will go over to the ohm
milliamp terminal there. First of all, we turn the multimeter around to two volts.
Each of these cells should produce around about point six five of a volt in
bright sunlight. So we’ll go over to the first, one red to red, black to black. If I
turn on our lamp supply, we’ve got around about 0.59 volts for that one. Turn
it off and repeat for the second cell and that one is also around about that
0.59 volts. Try number three. That was about 0.53 and try the last one.
That one’s around about 0.58 volts. So there’s different conditions here,
all the lamps are in exactly the same position so we don’t expect to get
exactly the same voltage out of them. If one of them came out to be zero, then
we’d know that one was a dud and we would be able to replace it. Which is
just a matter of unscrewing the nuts at the back and dropping in a fresh one,
making sure that we get the positive and negative terminals the right way around. you