This blog entry is about the QE (Qualified End-user) experience after installation of a Photovoltaic Generation system.
The installation is located south of Metro Manila Philippines.
The installation is composed of 3 arrays:
2x 230 watts Canadian Solar PV module driven by micro inverter.
3x 235 watts Yingli PV module driven by micro inverter.
5x 250 watts Yingli PV module driven by a string inverter.
The total name plate capacity of the system is 2,415 watts-peak.
History of the installation:
The installation started with 2x 230 watts array in early 2012.(http://www.eastgreenfields.com/solen-project)
The installation (lets now call it Project) was not expanded since Net Metering is not yet in place. Net Metering implementing rules and regulation (IRR) was only approved in late 2013.
The project was applied for net metering connection in 4th quarter of 2013, and was finally commissioned on July 2014.
When energized the total nameplate capacity was increased to 1,165 watts-peak. The Project capacity was further increased to 2,415 watts-peak as of mid-February 2015.
The electricity usage since the Project was approved for net metering increases, and the last 12 months average decreases. This means that the household now have extra electricity to power the appliances, while the import energy practically remains the same. Refer to graph below:
The last 12 months import average decreases while the actual load demand increases, this means more available energy for use generated from PV system.
From July 2014 (when net metering starts) up to mid-February 2015 (before expansion to 2415 watts-peak capacity) the own use against exported energy is higher, but when the expansion system was put on-line the export energy is now higher than the own use energy.
Actual bill payment decrease as export credit increases.
Graph shows the overview of the Project with the actual data from Meralco billing record.
Savings from actual load (usage of electricity without solar) ranges from 16% to 34% during the first 7 months of the Project with a capacity of 1165 watt-p system. The savings from actual load rises up to 63% when the system was expanded to 2415 watt-p capacity.
Following scan copy of the actual Meralco Bills...
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