Tonga - Electricity generation
| Date | Installed capacity MW | Generation GWh | Renewable installed capacity MW | Renewable generation GWh | Renewable percentage |
|---|---|---|---|---|---|
| 2022 | 33 | 75 | 15 | 10 | 13.33% |
| 2021 | 26 | 75 | 8 | 10 | 13.33% |
| 2020 | 26 | 74 | 8 | 10 | 13.55% |
| 2019 | 26 | 72 | 8 | 8 | 11.08% |
| 2018 | 25 | 69 | 7 | 7 | 10.22% |
| 2017 | 24 | 67 | 7 | 6 | 8.92% |
| 2016 | 22 | 60 | 4 | 5 | 8.29% |
| 2015 | 19 | 57 | 4 | 5 | 8.76% |
| 2014 | 16 | 53 | 2 | 4 | 7.56% |
| 2013 | 16 | 51 | 2 | 3 | 5.88% |
| 2012 | 16 | 50 | 2 | 1 | 2.00% |
| 2011 | 15 | 48 | 1 | ||
| 2010 | 14 | 49 | 0 | ||
| 2009 | 12 | 51 | 0 | ||
| 2008 | 12 | 50 | 0 | ||
| 2007 | 12 | 48 | 0 | ||
| 2006 | 12 | 46 | 0 | ||
| 2005 | 12 | 45 | 0 | ||
| 2004 | 12 | 44 | 0 | ||
| 2003 | 12 | 42 | 0 | ||
| 2002 | 10 | 38 | 0 | ||
| 2001 | 10 | 37 | |||
| 2000 | 8 | 30 | |||
| 1999 | 8 | 33 | |||
| 1998 | 7 | 35 | |||
| 1997 | 7 | 34 | |||
| 1996 | 7 | 32 | |||
| 1995 | 7 | 28 | |||
| 1994 | 7 | 27 | |||
| 1993 | 7 | 25 | |||
| 1992 | 7 | 25 | |||
| 1991 | 7 | 24 | |||
| 1990 | 7 | 23 | |||
| 1989 | 7 | 21 | |||
| 1988 | 7 | 20 | |||
| 1987 | 7 | 16 | |||
| 1986 | 6 | 12 | |||
| 1985 | 6 | 12 | |||
| 1984 | 6 | 12 | |||
| 1983 | 6 | 12 | |||
| 1982 | 6 | 12 | |||
| 1981 | 6 | 12 | |||
| 1980 | 6 | 9 |