Your budget is another major factor. A solar system is a long-term investment, so the cheapest quotation is not necessarily the only figure worth considering.
SOLAR panels line the rooftop of a residential home in the Philippines, turning sunlight into electricity for household use.
Photograph courtesy of AboitizPower
THE amount of electricity a solar system can produce depends on factors including panel capacity, roof space and sunlight exposure.
Photo courtesy of CN-STR/Agence France-Presse
A residential solar setup combines photovoltaic panels with an inverter and battery storage system to manage electricity generated from sunlight.
Photograph courtesy of Solax Power
The Philippines has a natural resource that homeowners can put to work: sunlight.
As electricity remains a regular household expense, more homeowners are looking at solar power as a way to generate some of their own electricity. But installing solar panels is not simply a matter of putting panels on the roof and letting the sun do the rest.
Different types of panels have different designs, efficiencies and space requirements. The right choice depends on the size of your roof, how much electricity your household uses and how you plan to use the system.
Know your solar panels
Solar panels use photovoltaic technology to convert sunlight into electricity. While they may look similar from a distance, the materials and construction inside the panels can differ.
For residential use, the three types most commonly discussed are monocrystalline, polycrystalline and thin-film panels.
Monocrystalline panels
Monocrystalline panels are made using single-crystal silicon cells. They are usually recognizable by their dark, uniform appearance and are known for having higher efficiency than many other panel types.
That higher efficiency can be useful when roof space is limited. Instead of needing a larger number of panels to produce a certain amount of electricity, a homeowner may be able to generate more power from a smaller area.
For condo rooftops, smaller houses, or homes where roof space is already being used for other equipment, this can be an important consideration.
Polycrystalline panels
Polycrystalline panels are made from multiple silicon crystals. They typically have a blue, speckled appearance and generally have lower efficiency than monocrystalline panels.
The trade-off is that they have historically offered a more affordable option for homeowners who have enough available roof space.
For a house with a larger, relatively unobstructed roof, the difference in efficiency may be less important than the overall cost of the system.
Thin-film panels
Thin-film panels are made by placing photovoltaic material in thin layers over a surface such as glass or another substrate. Unlike traditional rigid panels, some thin-film products can be made lightweight or flexible.
This makes the technology useful for certain applications where conventional panels may not be practical. However, thin-film panels generally have lower efficiency, meaning they may require more space to produce the same amount of electricity.
The important thing is not to choose based on the panel’s appearance alone. Consider where it will be installed and how much electricity you need it to produce.
Philippine climate matters
Living in a tropical country means solar panels have to deal with more than sunlight.
Heat, humidity, heavy rain and typhoons are all considerations when planning a residential solar system. High temperatures can affect panel performance, while moisture and weather exposure make proper installation and durable materials important.
Placement matters, too. A roof with good sun exposure may not perform as expected if nearby buildings, trees, or other structures regularly cast shadows over the panels.
Before installation, check how much direct sunlight your roof receives throughout the day. A professional installer can also assess the roof, determine the appropriate orientation and angle, and identify possible shading problems.
And while solar panels are designed for outdoor use, they are not completely maintenance-free. Dust, dirt, leaves, and other debris can reduce the amount of sunlight reaching the panels, so keeping them clean and checking the system periodically can help maintain performance.
How much will solar cost?
The price of a solar system varies considerably, so there is no single figure that applies to every home.
The total cost can depend on the number and wattage of panels, the type and quality of the equipment, installation requirements, roof conditions, inverter capacity, and whether battery storage is included.
A larger household with higher electricity consumption will generally require a larger system than a smaller home with modest energy needs.
Instead of looking only at the price of individual panels, consider the cost of the complete system. Ask installers for a breakdown of the equipment, installation, warranty coverage and expected energy production.
It is also worth comparing several quotations before making a decision. And before signing an installation contract, take a closer look at your home’s electricity use.
Review your recent electricity bills to understand how much power your household typically consumes. Then look at your roof: Is there enough usable space? Does it receive direct sunlight? Are there trees or buildings that could create shade?
Your budget is another major factor. A solar system is a long-term investment, so the cheapest quotation is not necessarily the only figure worth considering. Equipment warranties, installation quality, maintenance and expected performance should also be part of the conversation.
