🌞 Sunnytech Mini Solar Panel Module DIY Polysilicon Solar Epoxy Cell Charger B031 - 2W 6V 330mA Review

as stated by 2 other reviewers, cannot be used in sunlight for long periods (surface blistering - in addition to cosmetic issues, power delivery significant) . Still, 2 stars is cheap, fast shipping, and a great piece to test and play with - when sun exposure is limited to short periods only.

I have a small model boat. This charger is ideal for charging batteries. At cruising speed, the motor draws around 500mA, so this charger is enough to almost double my range. I had to buy two panels, I would never run out of power. The solar panel is almost ideal for keeping the battery charged, but must be turned off when not in use to avoid overcharging the battery.

In fact they are delaminated by the full force of sunlight, then they become saturated with moisture in the new bag. I had months like this before I got them up and running. They looked great on the shelf and in quick tests. However, they began to deteriorate on the first day in direct sunlight. Granted, I'm in South Florida and the sun is really strong here. The sun may not be as bright where you are and around you.

is very suitable for small personal projects. I wouldn't leave it in the sun for too long or too dramatically. It's hot like Florida where I live. Epoxy or whatever on it will start to bubble but if you use it indoors next to a window it will work great or if you don't bother and put it in a slight bald patch that will work too.

I purchased and tested 2 of these in direct June sunlight during rush hour (in America) and was getting a short circuit current of about 185mA with an open circuit voltage of about 6.9 volts for the first, that's 1.28 watts. The second panel had V = 6.56V and i = 280mA, which is 1.84W. As such, both were quite far from their advertised voltage and current ratings, and both fell short of their advertised 2W output in my testing. They work, but their performance will likely vary slightly from…

I connected two of these in series to power a small audio amplifier. They work well, especially since the amp is quite forgiving. Works on any voltage from 9 to 24 volts. A charge controller is therefore not required. The no-load current is about 300 mA. But all solar cells are sensitive to heat, and as they heat up, the current drops significantly. These panels can power the amp at moderate volume levels in direct sunlight. I connected them to a lithium ion battery with a diode to prevent…