Production and consumption of electrical energy (Upolu System)
| Particulars | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 |
| Installed Generating : (Capacity MW) | | | | | | |
| Total | 24.40 | 26.80 | 29.82 | 30.27 | 31.92 | 32.47 |
| Hydro | 11.20 | 11.35 | 11.80 | 11.80 | 11.80 | 11.80 |
| Diesel | 13.20 | 15.45 | 18.02 | 18.47 | 20.12 | 20.67 |
| Number of Generating sets: | | | | | | |
| Total | 18 | 20 | 20 | 17 | 20 | 21 |
| Hydro | 8 | 8 | 8 | 8 | 8 | 8 |
| Diesel | 10 | 12 | 12 | 9 | 12 | 13 |
| Energy Generated: (Million KWH) | | | | | | |
| Total | 80.19 | 95.90 | 112.1 | 28.36 | 28 | 29.54 |
| Hydro | 46.22 | 48.89 | 63.57 | 16.93 | 16 | 17.13 |
| Diesel | 33.97 | 47.01 | 48.53 | 11.43 | 12 | 12.41 |
| Energy Sold (a) | | | | | | |
| Million KWH | - | - | - | - | - | - |
| Generating Auxiliaries;
Consumption (b) : Million KWH | 0.37 | 0.35 | 0.54 | 0.42 | 0 | 0.23 |
| Distribution Losses Million KWH | 2.66 | - | - | - | - | - |
| Number of Consumers (c) | 19,211 | 21,825 | 22,542 | 23,237 | 23,941 | 24,958 |
Source: Electric Power Corporation.
Note : All figures related to Government owned electric power system on Upolu. Village lighting schemes and other private plants are not included.
(a) : Includes Energy used by the street lights on an estimated bases, Figures for energy sold are based on the meter reading carried out and are not an exact record for that year.
(b) : Generation auxiliary consumption was included as system loses prior 1978.
(c) : Number of consumers as at the end of the period. Number of Consumers corresponds to meter e.g if one person has two meters installed, these installation would be regarded as belonging to two consumer and not one.
: Manono and Apolima power station generating statistics are included Upolu Statistics.
: Two hired generators for Tanugamanono commenced operation at the end of August 1998 and are included in the number of Generating sets.
1/ : Provisional Figures.