Review on High-Efficiency 12V Monocrystalline Solar Panel by Newpowa - 5W PV Module for Battery Maintenance and Trickle Charging in RVs, Marine Boats, and Off-Grid Systems by Michael Pickering

Speaking of small 5 watt units I think they are great for the money but as I ordered 8 units I kept getting different sized units which was very annoying! there are different part numbers or parts lists for that. I swapped the odd units several times until I had a matching 8 units. One of the blocks had an odd dent on the bottom but I replaced it too easily. In any case they all seem to work and for the money I was expecting limited quality but the different sizes were annoying.