How does solar Energy work?
Polycrystalline Panels Vs Monocrystalline Panels
Polycrystalline are the most proven and time-tested technology in Solar Modules having more than 60 years of field-tested and proven track record.
Monocrystalline modules are relatively new technology, and they have higher area-efficiency in terms of output from a unit area of light falling on it, and conversion to electric energy. However, a 3 kWp power plant, whether using monocrystalline modules or polycrystalline modules will generate the same output under STC (Standard Test Conditions) conditions, just that the Monocrystalline modules will help you save some area (maybe a few square meters).
Remember, a 3 kWp Solar Panel, whether Monocrystalline or Poly Crystalline have been tested for 3 kWp in the factory before shipping; and will generate the same power output and you are only paying for the Wp output of the solar panels, not for the technology!
Thus, in all practical conditions, the only difference between Monocrystalline solar panels and polycrystalline solar panels are that monocrystalline modules can save some area (maybe a few square meters) needed to generate the same output; There is no change in output.
Monocrystalline modules are more expensive compared to Polycrystalline modules. Thus, if you have a lot of area to work with or if roof area is not a major constraint, you might find it more cost-effective to install more polycrystalline panels on your property to suit your energy needs because their price point is lower while generating the same power output.
Depending on where you live and how much roof area you have, polycrystalline panels can be a better value for money and investment for you, and technology is also advancing quickly in this area.