So I'm trying to build a mobile solar charger for camping, mainly for cellphone and some 18650s for my electric cigarette. I'm using:
Should Draw max 36W for 2 Fast charging devices, I can't find a datasheet...
I can not find a Datasheet for the life of me but it says it is rated for up to 50W
Specifications Nominal power Pmax 50 W Voltage at rated power Vpmax 18 volts Open-circuit voltage Voc 21.60 volts Short circuit current Isc 3.05 amps Maximum Power Current 2,78 Amps Ipmax Cell efficiency 18.25% Temperature range -40 ° C / + 85 ° C Tolerance + / -5 % Flexible Solar Cells Monocrystalline Dimensions: 680 x 550 x 2 mm Weight 1.4 kg
As a tech stack, I just connected everything together. I'm coming from a comp sci background so my experience is a bit limited.
At first it looks good, I adjust voltage to 12 V, and my panel delivers between 17-19 V to my converter in midday sun. If I plug in a single slow charging device into USB, converter shows about 0.3 A output at 12 V, like 3.something watts. As soon as I plug in a second device, output voltage drops to 0, nothing charges anymore. The same thing happens when I plug in my phone and the charger tries to quick charge, wtf am I doing wrong?
I need to be able to pull like 12 W (1 A at 12 V) at least for my 18650 charger, or at least charge my phone at 18 W, I never thought I would be able to use the full 50 W, I was hoping for half that, but 3 W? Not even worth taking it really.