Solar FAQS

The Photovoltaic (PV) system uses solar cells that are usually installed on top of a building’s roof to convert the sun’s rays into electricity.  The Direct Current (DC) produced by the solar cells are then converted by an inverter into Alternate Current (AC).  The converted energy can now be used by the appliances or loads in the building. 

Due to limited roof space and other constraints, one cannot really be independent from the grid.  Grid tied solar systems allows your building to pull electricity from the grid at night or when needed.  Depending on the system design, a solar PV system can also make use of the Net Metering Scheme, wherein excess power produced can be exported to the grid in exchange of credits to the client’s bill.   

Most buildings’ consumption peak during the day  - office hours.  Solar PV systems produce electricity at the same hours of the day.  During peak consumption, the solar PV system shaves off the amount of power consumed from the grid. This avoided consumption translates to avoided costs or savings.  At night, when the building uses less loads, power is sourced from the grid.

A top tier quality inverter will be installed as part of the system to monitor grid voltage, waveform, and frequency, as well as synchronize the flow of energy in the system. 

All installations will be done up to the Philippine Electrical Code standards, with complete permits from both local and national agencies. 

Depending on the size of the system and the bill rates in your area, ROI usually takes 5-12 years. 

Solar modules have been tested in the field showing small reductions in power output after 20 years, mostly because the glass surface becomes a bit dull and reflects more light. Solar panels generally carry an output warranty of 25 years. 

In  a grid connect system, as you are still tied to the main power supply, any deficit will come from the main grid. 

Several aspects need to be evaluated to determine if your building is a good solar site.  Orientation, building age, location, shadowing, current electricity usage will have to be assessed.  You may call the OITDC Office to inquire on how your building can be evaluated for a Solar PV System at (632) 858-8888 local 223