Most of them are overpriced, but they do work provided you can keep the panels in full sun for the day.

>>2840559
im never going to use one so I dont really care

>>2840559
They are very much a scam. The only reason they are as cheap and as ubiquitous as they are is because of government interference in the free market. Solar panels are good for calculators, highly mobile off-grid, and very off-grid permanent living. Everything else has been a misallocation of capital and a disaster for the human race.

>>2840559
>SCAM
At the level in op pic, no. Not a scam. You can recharge your devices, power a radio or satellite up/down link, pc/laptop, TV. If those things are important to you, yes not a scam. Powering your fridge/deep freezer for a couple of days is just a matter of scale. This could save lives by refrigerating medications or $100s even $1000s in food preservation. As I said, scaling to your requirements (or desire) is the key to functionality. Over do your system and you have a surplus. Under scale, and your fridge goes hot in a day or less. Think of it as an intermediate step to full off-the-grid.
>>2840571
>a disaster for the human race.
Drama queen much? Whew.