I'm looking for failure rates (λ) for the following:
PV panels (I have already found a study giving a figure of 2.96 failures/10^6 hours
VRLA Batteries
PV inverters (preferably off-grid)
PV charge controllers
Dear Vangelis
This is a very good question. My suggestion is that it be best for you to start with the NREL stiudies:
http://www.nrel.gov/pv/performance_reliability/real_time.html
From a financial analysis angle on component failures, you can download
http://www1.eere.energy.gov/solar/sunshot/financial_opps_detail.html?sol_id=575
Trust this helps
Gerro
IEA-PVPS Task 13 Annual Report is also a good reference.
(T13-01 2014 Review of Failures of PV Modules)
http://www.iea-pvps.org/index.php?id=275
Please find a complete Review of Failures of Photovoltaic Modules in
http://engineering.case.edu/centers/sdle/sites/engineering.case.edu.centers.sdle/files/iea-pvps_t13-01_2014_review_of_failures_of_photovoltaic_modules_final.pdf
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