Our investment in emissions-free and clean generation has reduced our impact on the air we breathe and demonstrates our commitment to environmental protection and stewardship. Our strategy is based on generating and delivering clean energy and building energy infrastructure that's reliable and affordable.
We expect that our investments in emissions-free wind and solar generation, innovative battery storage technology, low-emissions natural gas generation, safe and emissions-free nuclear power, industry-leading energy efficiency programs and transmission lines designed to deliver energy where it's needed will enable us to continue providing a wide range of benefits to our many valued stakeholders.
From delivering superior value to our customers, to being good stewards of our environment, to investing in the communities we serve, all while providing outstanding returns to our shareholders, being a clean energy leader is not just the way we do business, it is our business.
NextEra Energy Resources is one of the world's largest generators of clean, renewable wind energy, with the largest market share of North American wind capacity. Over the last decade, our wind energy capacity has nearly tripled.
We operate more than 15,000 MW of emissions-free wind energy with plans to continue expanding our industry-leading renewable energy portfolio.
For 2019-2020, we expect to bring online an additional 3,000 to 4,300 MW of clean, emissions-free wind energy. In 2018 alone, our wind energy portfolio grew by more than 1,400 MW, adding nine wind farms in five states. In addition, we repowered nearly 900 MW of wind energy in 2018, increasing our facilities' efficiency. We now have 119 wind projects in operation across 19 U.S. states and four Canadian provinces, which provide home-grown affordable energy and economic benefits to local communities.
With the combined power of both of our principal subsidiaries, NextEra Energy Resources and FPL, generating solar energy across the nation, we are one of the leading operators of renewable energy from the sun.
For nearly 30 years, NextEra Energy has pioneered universal solar.
FPL is the largest generator of solar energy in Florida with 18 major solar power plants and numerous other solar installations, totaling more than 1,250 megawatts of solar generation with more than 5 million solar panels installed. Eight new solar energy centers entered service in 2018 and four new solar energy centers have entered service so far in 2019.
NextEra Energy Resources is a leading generator of renewable energy from the sun, operating more than 2,000 megawatts of universal-scale solar energy in the U.S.
In 2018 alone, we added 326 MW of solar power to our capacity, and we expect to bring online an additional 1,000 to 2,500 MW of clean, emissions-free solar energy outside of Florida in 2019-2020.
We continue to tailor solutions for commercial, utility and public power customers who want to produce their own clean, reliable solar energy by helping install projects on rooftops, parking structures and vacant land. We develop, build, finance and operate these systems on or near a customer's site to help them control costs and meet their renewable energy goals.