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Table 7

Comparative costs and emissions of stand-alone power supply options (generator versus solar system).

Configuration PV capacity (kW) Generator capacity (kW) Number of batteries (6 V/225 Ah) Converter capacity (kW) Initial capital (€) Annual generator usage (h) Annual quantity of diesel (L) Total net present cost (€) for 25 yr Cost of energy (€/kWh) Renewable fraction CO2 emission (t/yr)
Generator only 0 2.5 0 0 2100 8760 3558 85 528 2.31 0.00 9.371
PV+ Battery 10 0 10 2 19 379 0 0 21 478 0.58 1.00 0.000

*The increase in diesel cost, opportunity cost of procurement of diesel in the area, down time of diesel generator (DG) sets for maintenance and repair, and benefits carbon credit accruing to solar PV plants are not factored in the calculation.