Sunnytech® 1pc 2w 6v 330ma Mini Solar Panel Module DIY Polysilicon Solar Epoxy Cell Charger B031

I am using these to charge lithium batteries to run outdoor lighting -- seasonal (Christmas lights far from the house), and to light our driveway. They work quite well and have no problems with weather, including being burred in snow :-).But watch soldering the connectors to the board (heat the pads no more than absolutely required for the solder) and use stress relief on the wires once attached. The solder pads look big, but are not strong. Once attached and with the wires fixed so that they do not pull on the board -- no problems at all.

I have a small model boat. this charger is ideal for charging the battery. At cruise speed, the motor takes about 500ma, so this charger adds enough power to nearly double my range. I should have bought two panels, I would never run out of power. A solar cell is almost ideal to keep a battery charged however, this cell has to be disconnected when not in use so as to not overcharge the battery.

I’m giving this 5/5 based on its value for the price. I tested it and it performs just as good or better than my expectations and will work great for my weather station.I have not yet tested it’s durability, but that may come down to how I mount the panel. I’ll probably put it in a sealed gram to be safe.Perfect little panel!

I bought and tested 2 of these in direct June sunlight close to peak hours (in America), and got a short-circuit current of about 185 mA with open-circuit voltage around 6.9 Volts for the first one, which comes out to 1.28 Watts. The second panel had V = 6.56 V and i = 280 mA which comes out to 1.84 Watts. So both were pretty far off from the stated voltage and current values, and both fell short of the 2 Watt stated power output in my testing.They work but their output will probably be a fair bit off the stated values. Understandable for the price. They're still okay for experimenting and little projects where the values don't have to be exact.

I was thinking that will not work but I used daily on my feeder at hunting ranch and works good recommend for the price I use to buy same 6v for 30 dllrs at academy

With afternoon sun shining through my patio door and onto this solar panel, my voltmeter reads almost 7V coming out of the terminals of this panel - nice! This will help charge my 6V-rated device faster. However, if you're looking for exactly 6V (as the product description says), you may want to first check your panel with a multimeter.For me, I recently bought a Ring.com doorbell (they released a new HD version), and relegated the previous first-generation one to back-yard duty. The neat thing about the first-gen device is that it can operate on battery power. The bad news is that I have to charge it every few months or so. But, by hooking up this solar panel to it, I hope to never needing to charge the sucker! : )

The webpage listed these solar cells at a maximum of 6 V. Even with late afternoon sun in Winter, the cell I measured put out over 15 V. There is no way I can use them, even with Zener regulation, for the 5 V charging current that I needed. The cells are fine, if you need the higher voltage, just NOT anywhere near 6 V. They appear to be the Sunnytech 3W 12 VB047 arrays, not the 6 V B031 arrays listed on this webpage. The label for this B031 unit was stuck on over a B047 label. That is the 12V, 330 mA version of their arrays. They are not usable if you really wanted the 6V version.

Panels are ok for experiments, small curious minds.. as far as using them for what I needed to use them for.. not going to work. They need to be in direct sunlight, but the plastic film covering the panels turns white in direct sunlight and bubbles up. Blocking the direct sun light. Not sure if this film should be removed as a protective film over the panels, or if it is part of the "snow proof" protection ? Will not buy again with out knowing what this film is for.