# Solar Energy Kits For Students

Hi this is Amy from the altE Store. We’vebeen doing a series of tutorials where we are showing wiring mismatched solar panels and what makes sense for wiring them; in series, in parallel, or just not even at all. So we’ve been puttingtogether a playlist, and you can see that here so you can watch through with some ofthe other examples we’ve given. So right now, what I’ve got is two 100W solar panels. Oneis a 24V nominal, and one is a 12V nominal. So what we are going to show is they are bothgoing to go through an MPPT charge controller. So going into the battery, we’re going tomeasure them each individually, so we can confirm what we are getting individually.Then we are going to wire them in series,

and we’re going to wire them in parallel.Alright? So, first we’ve got our 24V solar panel and it is going through the MPPT chargecontroller, and it’s going into my 12V battery. So I’m going to turn on the solar input andI am getting… there we go, I’ve got 32.9V into the charge controller, I’ve got 12.9Vat the battery coming out of the charge controller, and I have 5.69A going from the charge controllerinto the battery. Now keep in mind, this solar panel has got an Imp, a maximum power current,of 2.78A. So it’s putting in 2.78A into the charge controller, and it’s coming out at5.69A. So that’s because the MPPT charge controller is taking that high voltage, it’s droppingit down, and then it’s outputting the higher

amperage with the lower voltage, retainingmost of the power. So I’m just going to write this down and then we are going to rewireit so that we’re going to measure the 12V panel. Alright. So now I’ve got my 12V solarpanel, also 100W. So you can see I’ve got an input of about 20V, so my Vmp is rightaround 18V, so it’s actually doing quite well. It’s really putting in a very high voltage, I’vegot perfect conditions here. And it’s going through the MPPT charge controller, and it’soutputting 4., let’s say 4.42A. So that is compared to the 5.69 amps, and it’s also rightaround 13.1 volts. So the Imp of the 12V panel is 5.56A, and I’m seeing 5.81A going in. Soagain, it’s doing really well. I’ve got great

conditions. Because it’s dropping that voltagedown, it is actually increasing that current a little bit. So that’s one of the advantagesof using an MPPT charge controller. You can actually get a little bit better than Imp,or maximum power current into the battery. So, I’m going to now change this around andwire the two of them in series, and we’ll see what we get with that. Alright. So nowI’ve got these two wired in series. So I have the plus from the 12V panel going to the chargecontroller. The minus going to the plus of the 24V panel. And then that minus is cominginto the charge controller. So they are wired in series. And I’m getting 43.8V going intothe charge controller, which makes sense because

that’s the two of these added together, becausewiring in series increases voltage. So now coming out, I’m getting 8.81A (I’m going towrite that down, 8.81A). Because it’s taking all of the current that’s going in, and increasingit as it’s dropping that voltage down to the 13.4V. So, now, we’re going to change it,and we’re going to wire the two of them in parallel and see what we get for output. OK,so I have 24V panel and the 12V panel wired in parallel. Now you see, I’ve got 23V in.Now when I had that solar panel, the 24V solar panel by itself, it was measuring up around40V. But because I’ve got it wired in parallel with this 12V panel, that’s putting out about18V, it’s pulling that voltage down. So it

is dramatically reducing the voltage outputof that solar panel. So just from what we see going in, we can see that it’s very unhappybeing wired in parallel with a lower voltage. So doing the series in, you saw that it hadadded the two volts, and that was fine. So doing it in parallel, we’re pulling that down,we’re greatly reducing it. The current output is about 7A, so we’ve got that lower voltagegoing in, but we’re only around 7A coming out. And we were up in the upper 8 amps whenwe were wired in series. So you can see here that wiring two mismatched panels, if you’vegot mismatched voltages, and you’ve got an MPPT charge controller, wire the two of themin series, let the voltage go through, add

## Primus Solar Lighting Kit Solar Camping Light Kits

this is the Primus solar light kit. It is theultimate camping light kit. it consists of a solar panel, a battery pack and four LEDlights and a few other accessories which i’ll take you through. The entire kit fits intothis box, and it has a carry handle here which is perfect for transportation. So let’s takea look inside. You’ve got your instruction manual with aparts list and operation guide. This is your battery pack. This is one of your four LED lights, you haveanother one, two, three in the box. And this is your solar panel. So this solarpanel will fully charge this battery pack

in about 8 hours of full sunlight, and thenthe battery pack has the capacity to run all four LED lights for 16 hours. Obviously theless lights that you’re running the longer the lights will last. There is a 5 metre cable from the solar panelto the battery pack, and then each light has the potential to have 7 metres of cable goingbetween it and the battery pack, all with their individual switch. The battery pack itself has, so the lightsplug in to the load one and load two on top, you have the solar panel charges into theside, plugs into the side like that, and then

there is a little mobile phone charging kitwhich gives you different phone connectors, so very handy for when you are out campingand get a low battery on your phone, stick it in here and charge away. There is also this plug here, so if you wantto you can swap one of the LED Lights out for this cigarette plug attachment and thenyou can run other things off this battery pack as well, making it even more handy. Keepin mind the more you’re running off the battery the shorter the lifespan is so keep that inmind, and it is not a good idea to run this battery completely flat.