More solar panels will be fitted to the Geoff Moulder Leisure Complex in a move that should generate more than £100,000.
An additional 142 panels will be fitted to the roof of the gym at the Boston Borough Council-run complex at a cost of £40,000 and work is due to start within the next few weeks.
Lincoln-based company Freewatt will fit the system, which will pay for itself in less than seven years.
The 35.5kWp array will generate a Feed in Tariff income of more than £3,000 a year and, with most of the power produced by the panels being used in the building, it will generate a total of around £5,000 a year in income and fuel savings.
Over the 20 year lifespan of the system it is estimated it will generate almost £106,000 in income and savings and save around 16 tons of CO2 emissions a year.
The complex had 200 panels fitted in early 2012 to the main pool hall roof and following the success of that scheme it decided to go ahead with more.
Freewatt CEO Julian Patrick said: “The financial benefits of solar power are extremely good and can make a significant contribution to the running costs of community facilities such as this.
“We hope the work we do can help secure the future of this important centre for the people of Boston.”
Coun Peter Bedford, leader of the borough council, said: “This is further evidence of action by the council to reduce its carbon footprint and save on energy costs by making best use of the latest available technology.
“By its nature a building such as the Geoff Moulder Leisure Complex is going to be fuel hungry.
“With this second installation of solar panels we are doing what we can to make it run as efficiently as possible.”