My 4.4kW array:
November 2018 = 412kWh
November 2017 = 448kWh
November 2016 = 423kWh
November 2015 = 415kWh (yes, the same as 2014 within 0.3kWh)
November 2014 = 415kWh
November 2013 = 368kWh
Certainly would have made roughly 14kWh more last month if I'd gotten on the roof and investigated the one panel that I was having an output issue with. The adjacent panels had 20.0 and 21.2kWh output for the month. The one I repaired had 6.75kWh output for the month. However, that's about $1.68 worth of energy at my local rates.
For anyone on the fence about PV, I saw pricing at $0.54/W today, including Enphase M215 inverters... Shipping, Racking, and Cabling, extra, but cross country shipping for a pallet was $450 last spring (CA to FL).
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