Which has higher installed solar energy capacity, Sierra Leone or Tonga?

Sierra Leone, at 0.0174 gigawatts against 0.0158 gigawatts in Tonga as of 2025.

What is the difference in installed solar energy capacity between Sierra Leone and Tonga?

0.0016 gigawatts, with Sierra Leone ahead.

How many years of comparable data are there for Sierra Leone and Tonga?

22 years are reported by both, from 2004 to 2025.

Where does this data come from?

IRENA (2026) – processed by Our World in Data, published as Installed solar energy capacity. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Sierra Leone vs Tonga: Installed solar energy capacity

Sierra Leone

0.0174 gigawatts

in 2025

Tonga

0.0158 gigawatts

in 2025

Sierra Leone rank

163rd

Tonga rank

166th

Installed solar energy capacity over time

Sierra Leone
Tonga

How they compare

Sierra Leone currently reports 0.0174 gigawatts against 0.0158 gigawatts in Tonga, a difference of 0.0016 gigawatts.

That makes Sierra Leone's figure about 1.1 times Tonga's.

The two have swapped places 1 time across 22 shared years of data; in 2004 it was Tonga ahead.

Sierra Leone ranks 163rd and Tonga ranks 166th of 218 countries.

Across the 3 decades both report, Sierra Leone averaged higher in 1 and Tonga in 2.

Head to head by decade

Decade	Sierra Leone	Tonga	Difference	Ahead
2000s	0 gigawatts	0.0001 gigawatts	0.0001 gigawatts	Tonga
2010s	0.0006 gigawatts	0.0037 gigawatts	0.003 gigawatts	Tonga
2020s	0.0137 gigawatts	0.0125 gigawatts	0.0013 gigawatts	Sierra Leone

Averages of every year both report within each decade.

Frequently asked questions

Which has higher installed solar energy capacity, Sierra Leone or Tonga?: Sierra Leone, at 0.0174 gigawatts against 0.0158 gigawatts in Tonga as of 2025.
What is the difference in installed solar energy capacity between Sierra Leone and Tonga?: 0.0016 gigawatts, with Sierra Leone ahead.
How many years of comparable data are there for Sierra Leone and Tonga?: 22 years are reported by both, from 2004 to 2025.
How do Sierra Leone and Tonga rank globally for installed solar energy capacity?: Sierra Leone ranks 163rd and Tonga ranks 166th of 218 countries.
Where does this data come from?: IRENA (2026) – processed by Our World in Data, published as Installed solar energy capacity. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Sierra Leone vs Tonga: Installed solar energy capacity. Statizoid, drawing on IRENA (2026) – processed by Our World in Data. Retrieved 22 September 2026, from https://energy.statizoid.com/compare/installed-solar-pv-capacity/sierra-leone/tonga/

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<a href="https://energy.statizoid.com/compare/installed-solar-pv-capacity/sierra-leone/tonga/">Sierra Leone vs Tonga: Installed solar energy capacity</a> — Statizoid

About this data

Indicator: Installed solar energy capacity
Unit: gigawatts
Source: IRENA (2026) – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 218 places, 4,162 data points, 2000–2025
Last refreshed: 18 September 2026

Total solar (on- and off-grid) electricity installed capacity, measured in gigawatts. This includes solar photovoltaic and concentrated solar power.