What is the difference between mono-crystalline and poly-crystalline panels?
Mono-crystalline cells are made from a single crystal of ultra pure silicon. They are the original silicon solar cell and they are still the most efficient. Poly-crystalline cells are made up of multiple crystals and are generally cheaper to manufacture then mono cells. The gap in performance has narrowed significantly over the years to the point where they are very close. Both are good technologies but mono cells tend to be more efficient but more expensive per watt.
