Theoretical calculation for a 60W luminaire*
On-grid luminaire
Solar-powered luminaire
€500
€650
Pole
€250
€250
Luminaire
Solar kit
/
€1,300
Total initial investment (without grid extension)
€750
€2,200
Running costs
€55/year (4,000 burning hours/year)
/
Energy (0.2104€/kWh 1 )
€200/year (based on published figures from major cities)
/
Maintenance
ROI calculation
On-grid luminaire
Solar-powered luminaire
5.5 years
Break even
€4,170
€2,200
TCO over 12 years 2
SAVINGS OVER 12 YEARS
/
€1,970 (-47%)
The above use case assumes that the grid is readily available. For completely new installations (including grid extension and based on an average estimated cost of €300/m and a spacing of 30m), the investment for solar lighting can be as much as 85% lower than for grid lighting. And that’s without counting the costs of connection to the electrical cabinet billed by the electricity network operator. This makes solar lighting even more financially attractive.
1 Eurostat: https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Electricity_price_statistics#Electricity_ prices_for_non-household_consumers 2 With a yearly inflation rate of 2% (average annual inflation rate in Europe between 2013-2022). 15
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