LEGO 9912 Solar Cell is a Education set from 1999 valued at $40 for new and sealed sets, up 14% from an original retail price of $34.99. Annual appreciation has averaged 0.71% since release. Used copies are valued between $20 and $28 depending on condition.
LEGO 9912 Solar Cell is an Education set released in 1999, consisting of 1 piece. Also known as Solar Panel, it is a green 9V electric solar cell designed for use with other LEGO elements in classroom and STEM activities. The component could be used to power small LEGO motors or lights while demonstrating basic renewable energy concepts. It was also included in set 9684 Renewable Energy Set II.
A new and sealed Solar Cell is currently valued at around $40. The average used price is $27 for those in good overall condition. Based on current trends, this set could be valued near $40 within the next year.