So we’re gonna do a solar power output test with these USB solar panels, and we have a 20 watt one and a 10 watt, and we have a battery bank that can input 4 amps and then we also have a fan, and So I’m gonna check how much power we can milk from these panels.
So first we’re, going to test the 10 watt and see how much power it can produce and the total output that we have is 4.8 volts. In 1.0 7 amps, so we’re, getting 5 watts from the 10 watt solar panel. Now we’re gonna test, the 20 watt and technically this is a 21 watt panel and we are pulling 1.
95 amps if 4.87 volts. So we’re, only pulling nine point, four nine watts from a 20 watt solar panel, so both of these panels, even though they’re different. They’re, producing the same amount of power about 50 % of their rated output.
Now we’re gonna change the angle and see if we can get any more power out of these. Oh there we go, we got 1.3. It’s. Four point: eight one point three was the highest number. I could get one point three, three, okay, one point three three and four point eight.
So we got six point three watts max for the 10 watt and let’s. Do the same thing: with the 20 watt, we’re. Getting two point: two at four point: nine two point two point: three at four point: nine yeah, two point: three at four point: nine was the best I could get that’s; only eleven point; seven Watts that’s.
Not that great. I was hoping we could get like seventy or eighty percent of the reason, output, but consistently it’s about fifty to fifty-five percent of the rated output. So I’m, actually pretty disappointed in the results of these panels, but they are super useful.
So if you’re backpacking, I mean this is great. You can charge up your phone, you can even charge a small USB powered laptop. They actually make those now, but just understand that the rated output is not accurate, so you should probably buy a panel bigger than what you need.
So something else I want to add is this is the same one as the anchor ones or the other 150 dollar ones. This is only forty to fifty dollars. These are all rebranded you guys. These are not special all right.
These are not made by anchor or any of these companies; they buy it from one company, they put their label on it, so buy the cheapest one. You can, because they’re. All the same also check out the size difference when folded up this one produces double.
The power is almost the same size as this one in the weight feels kind of heavy. With this one so yeah, this one seems like the better buy, especially for how much these things cost get the 21 watt panel so yeah.
I hope you guys found this useful. It was pretty interesting to actually finally test these, and this was not sponsored. I bought these with my own money, so yeah I’ll, talk to you guys later bye. So now we’re gonna do a test to determine if these two USB outputs are in parallel and not separate converter or regulator.
Some people commented yesterday about it. So now I’m reposting this video. So before yesterday I had to wattmeters connected to this battery or with the fan, and I noticed that when I disconnected one of them it didn’t change.
The total output at all it was the exact same number, so I just ended up using this battery yesterday and it was the maximum that I could get out of there. But now we’re gonna further test. This experiment.
We have 2 watt meters and we have a 1.5 ohm resistor are connected with xt60 connectors to each USB output for both watt meters. So this load right here will make these go to the maximum amount, and we have this ammeter to see how much power we can produce with it and right now we’re, getting 2 amps, let’s, see if we can get Any more 2.
5 3.5 amps at 3.7 volts, so that’s, actually, not that good. That’s pretty low compared to yesterday and over here. Of course, we have one point two and then 0.9 and when then we still have, we have two amps, so it’s the same.
I did notice, though, that this resistor pack lowers the voltage quite substantially. So what we’re gonna do is use my battery pack that can input 4 amps and at 5 volts that’s 20 Watts. So now we’re, going to check the voltage and the current and see what it is and I’m gonna show you guys when I disconnect one that the output is still the same.
So right now we have. We have point 5 amps in one amp at 4.8, volts so that’s. 1.5 amps. Now we’re gonna disconnect one of them. We have 1.5 2 amps. That means that these two USB outputs are in parallel.
I also took this one apart last night and it only has one and they’re both in parallel. So now we have the 10 watt and we’re, pulling point 2 amps in point 6 amps at 4, point 7 volts. So that means point 8 amps.
Now we’re gonna pull one off and now the total jumps up to 0.8 amps. So yeah no secrets here. These are all in parallel. If you buy cheap converter boards of any kind, even USB chargers for your home, they’re, typically gonna be in parallel.
Now for the next test, we’re gonna see the output. When I shade one of the cells, the output is 1.3 at 4.8 volts and that’s, 66 percent of the output. So that means that these solar cells are in parallel.
They’re, not in series. I bet it’s the same with this panel, but let’s check it out. Right now we have 1.07, we’re gonna add the shading, and now it’s. Point seven point: six, nine! So yeah same thing with this one, so yeah.
That means that these solar cells are in parallel as well, and then we get point three three when I shave two of them,