Rooftop Solar Installation: 4 Year Performance Review – Phoenix Group Metals

September 21, 2015 marked the 4 year anniversary of Royal Solar’s rooftop solar installation for Phoenix Group Metals in Phoenix, AZ.

Let’s take a look at the solar system’s production.

The Phoenix Group Metals rooftop solar installation consists of (208) SolarWorld 240 watt solar panels and (208) Enphase Energy M215 micro inverters.  The resulting system is a 49.92 kWp-DC solar system installed on Phoenix Group Metals’ metal roof in Phoenix, Arizona.

The solar system was originally projected to produce 91,569 kWh in Year 1, with 0.5% degradation per year in expected kWh production.

Per the Enphase Energy monitoring system Enlighten, Royal Solar is able to remotely monitor and verify the solar system’s daily, weekly, monthly , and annual production on a per-panel basis.

As of the solar system’s 4 year anniversary, lifetime production is reported as 365 MWh compared to the expected 357 MWh (1 MWh = 1,000 kWh).  This translates to 102% actual kWh production vs. expected over the first 5 years of system operation.

Per the below chart, you can see that the system consistently over produces electricity in the summer months, when electricity is most valuable in Arizona.

September 2011 – September 2015 kWh production from Phoenix Group Metals rooftop solar system.

September 2011 – September 2015 kWh production from Phoenix Group Metals rooftop solar system.

Below is a picture of the solar installation.

Rooftop Solar Installation in Phoenix, AZ by Royal Solar of Arizona.

Rooftop Solar Installation in Phoenix, AZ by Royal Solar of Arizona.

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