The most efficient solar panels include RECOM's Black Tiger RCM-700-RDBRCN, AIKO's Neostar 3P54, Belinus's GAIA, and LONGi's Hi-MO S10. All of these are made by some of the largest solar manufacturers in the world. Due to the many advances in photovoltaic technology over the last decade, the average panel conversion efficiency has increased from 15% to over 24%. Since 2020, the race to develop the world's most powerful solar panel has escalated rapidly, driven by. Solar-cell efficiency is the portion of energy in sunlight that is converted into electricity by a solar cell. Access our research-cell efficiency data.