You have decided to finally install a solar panel system into your home, but what type is best for you?

Some say it’s mono, while others recommend poly panels instead. While one is said to be more efficient, they both actually perform similarly given the same system output. One simply has to consider the space and budget available, in order to choose the best system for your home.

What’s the Difference?

Illustration of monocrystalline wafers that form a mono-Si panel

Illustration of polycrystalline wafers that form a poly-Si panel

Monocrystalline Panels

Monocrystalline silicon (mono-Si) panels are essentially made of wafers that comes from a single crystal of silicon. They have a uniform, black color finish which indicates high-purity or high-grade raw material. Simply, they are the premium panel option. They can easily be identified by the rounded edge wafers that form little white diamonds, amidst the black surface.

Typically, they have a 350W-360W output for a 72-cell panel. Having the highest efficiency, they require less panels and, therefore, less space to produce a certain power output. However, this also means that monocrystalline panels come with a significantly higher price tag.

 

Polycrystalline Panels

Polycrystalline silicon (p-Si) panels, on the other hand, are made of wafers from various silicon fragments melted together. Instead of black, they come in a blue finish with perfectly square wafers – making them quick to distinguish from mono-Si panels.

They normally have a 335W output for a 72-cell panel. Due to a lower level of silicon purity, they are not as efficient and therefore require more panels to produce the same power output. Poly panels also have a slightly lower heat tolerance than mono panels, which may sometimes affect performance. However, they do come at a much lower price point.

Comparing Performance

Based on the specifications of a mono-Si panel and poly-Si panel, of the same brand.

System Output

When comparing solar panel systems of the same-rated power output (wattage), there should be no difference in the performance. If you had a system with polycrystalline panels and another with monocrystalline panels, both set to produce 3kW – they would both generate the same amount of power. The only difference would be the space that the system would occupy: Mono system would take up less space due to less panels needed, while the Poly system would take up a bit more.

 

Temperature Coefficient 

Solar panels like sunlight, but not heat. The temperature coefficient simply measures how much power output drops in hotter temperatures. According to specifications, mono panels perform about 0.04% better per degree Celsius than poly panels. This results to a less than 1% increase in power output for mono systems, given weather conditions in the Philippines.

 

All in all, if roof space is not an issue, then our experts recommend going with polycrystalline panels to be more cost-efficient. After all, given the same target system output, there is essentially no difference in the performance of both these panels.

Each roof is different.

Prior to installation, we have to consider the shape and dimensions of your roof, proper orientation and tilt, and many more factors. It’s best to consult our solar professionals for recommendation.