My 4.4kW system December data:
2017: 442 kWh
2016: 377 kWh
2015: 322 kWh
2014: 422 kWh
2013: 359 kWh
2017 Annual output= 5,960kWh
2016 Annual output= 5,801kWh
2015 Annual output= 5,856kWh
2014 Annual output= 6,388kWh
2013 Partial Year (Aug 1 to Dec 31) output= 2,334kWh
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