groar's solar panels thread

[groar]

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.