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Old 09-16-08, 03:58 PM   #1
groar
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Default groar's solar panels thread

During last two days, 3kWc of solar panels have been installed on our roof.

Edit: here is its yearly and monthly production since 2008/11/21:




Misc data :
  • Surface : 23.37 m² (3.64 x 7.53).
  • 25 poly crystalline panels of 120W (+/-3%) each.
  • The irradiation is around 1428 kWh/m²/year.
  • The panels should generate 3170kWh/year.
  • Panels' efficiency is guaranteed at 80% for 25 years.
  • The panels are used for watertightness of the roof.
  • Aeration at top and bottom sides permit to cool down the panels.
  • Panels organized into two strings (12/13)
  • The inverter has 2 independent trackers to manage the two asymmetric strings.

The system has not been switched on as when connected to the internal network, the circuit breaker opens. It seams I have a problem on my internal network

Next step in a few weeks/months/... when ERDF, to whom I will sale my production, will connect to my inverter

Costs :
  • Panels + inverter costs (material + install) : 22k€
  • ERDF install cost : 600€
  • Government aid : 8k€ in 1 year
  • Sale price : ~0.57€/kWh, ie around 1800€/year
  • Taxes : 60€/year to ERDF and 40€/year to government
  • Inverter : 1500€ every 10years
The project should have paid for itself in 10 years.
Loan : 8k€ for 10 years at 2% : monthly payment = 75€

Notes :
  • The high sale price is because the panels are integrated to the house, here they permit the watertightness of the roof. Else it would have been 0.33€/kWh. These prices are guaranteed during 20 years for all sale contracts signed before the end of the year. Next year, new contracts will be signed with sale prices gone down...
  • The government aid is valid for all install done before end of 2009. It covers a part of the material price. For photovoltaïc it's 50% of the material price. This amount is limited to 4000€ by adult and 200€ by children. It's limited in time for the period 2006-2009 for all the ecological projects. In this single project we are using all our possible ecological government aid.
  • The loan has a small interest rate as this is a "validated" ecological project, else it would have been 7%.

(unsorted) pictures are here : Album: install

Denis.

__________________
Earth absorbs 1.8 t CO2/head/yr, while a French generates 6.2 t CO2/yr
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  • kg saved 06/08-08/09: 1816.9+382.9 (ecodriving / 1420mi not driven) = 2199.8
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    (2.66 kg/l diesel)
  • kg saved by 3kWc photo-voltaic solar panels : 187 kg/yr
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    (59.1 g/kWh)
Radioactive wastes saved by 3kWc photo-voltaic solar panels :
  • Long life (>100,000 years) : 2.85 g/yr (0.9 mg/kWh)
  • Short life (<300 years) : 31.7 g/yr (10.0 mg/kWh)
Based upon "official" French figures...

Last edited by groar; 01-18-09 at 04:30 AM.. Reason: Added other production pictures
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