Purely Solar’s panel dimensions have changed. Please note the updated frame size. Due to the new China Solar Tariff for imports to the US Market we were forced to switch to South Korea Production. Unfortunately with this change we were forced to change frame size / dimensions. Theses panels are compatible with most 100 watt panels including the Solar Penny Branded Panels. If matching up with Solar Penny Panels purchased in 2011-2014 the dimensions will vary. The new panels are longer and narrower. We have been selling them in the store for two months and customers have given positive feedback on this size.