Kindly donated by Jonty, this 240W 60-cell solar panel has an open-circuit voltage of 36 Volts and a short-circuit current of 8.7 Amps max.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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Only 2 buss bars. Looks like a pretty old panel. Nice video there.
Love it! Nice choice of words. Hazy
I have one 10.5 amps in summer nearly 9 amps winter time a little more clouds but guess what I am in Jamaica . You have an exceptional friend as he have given you a life time supply of energy free respect to him.
wow
Looks like all your established panels are just "out in the open". Here in northern Michigan USA, winters can be pretty brutal. Would you see any value in wrapping a panel in some non-fogging plastic sheet (or some such) for permanent outside setup? Thx.
I am not a friend of Jonty but I got one of this from my buddy at cal valley solar!!!!
You most certainly can create sparks by shorting a solar panel, even though the voltage drops to 0 or near 0. I've singed many wires and anderson plugs over time by shorting high power solar panels. You can arc weld with the leads of a 250 watt solar panel.
The good news is, in no way can you ruin the solar module itself.
Excellent Video …. does your friend need more friends?
Excellent channel, i loved all your videos, and your detailed explanation when you speak…I will sub to you right now and thumbs up my friend….Amazing channel…
this is the thing with panels, one cell shadowed to 50% light reduces the whole panel to 50% output, its the weak link in the chain principle.
Hi. I have been playing with these things for years. It's definately a poly panel and the one on the fence is a mono. I assume your solar system is 12v from the size of your existing panels. The new panel will charge into your 12v system at something like the rated amps, but of course it will give less watts being at a lower voltage. so you could use it as you suggest or on your system, or choose between the 2. I run a tracking gate with 10 of these panels on it in a 48v system, and have uploaded a series of videos showing it's construction. All the best, cheers, Andy
Regarding your comment that the panel is putting out 180 watts: You multiplied the short circuit current by the open circuit voltage, didn't you? I don't think that's correct. You either have 4 amps times 0 volts or 36 volts times zero amps. This comes to zero watts in either case. I just watched your 2N3904 video, so I know you know your Ohms law.
You forgot to zero-out the current meter, it was still showing 0.4A without any cables.
For DC measurements with a current clamp, you always need to zero it just before the actual measurement.