The world-renowned university confirmed it has now invested up to £135,000 in six solar arrays deployed on it's sites across London.
The solar panels are expected to cut the LSE's carbon footprint by 40 tonnes a year with the two latest installations leading to savings of over 22 tonnes a year.
"Having these panels installed is a win-win for LSE," said Julian Robinson, director of estates at LSE. "Making use of solar power is contributing to the reduction in the school's carbon footprint while saving money in the long run.
"We are generating an annual saving across all six installations of £8,500. On top of this we are receiving the FITs which come to around £16,000, making a total of £24,500 pa against our capital investment."
The project demonsts the scale of the financial returns large organisations could realise through solar installations.