Compare Solar Panels

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Compare Solar Panels We've put all our larger solar panels here to make it easier to compare prices. Power outputs range between 385W to under 450W. Cost vs. value – other factors As not all panels and module manufacturers are equal, there are a variety of other factors that should influence your purchase decision rather than focusing solely on cost. Tolerance This is the range a panel will either exceed or not meet its rated power. For example, a solar module you purchase may have a ‘nameplate' wattage of 250 watts; but due to quality control issues, may in reality only be 240 watts. A positive tolerance rating means the panel will not only generate 250 watts, but perhaps more under standard testing conditions. Temperature co-efficient The temperature co-efficient rating is important to determine what the impact heat has on a solar panel's operation after installation. The lower the percentage per degree Celsius, the better. Conversion efficiency The efficiency of how a solar panel converts light into electrical energy will determine how much power your system generates. If two solar panels cost the same, but one has a higher conversion efficiency; then that module provides the better value for money – assuming the claimed efficiencies are correct. PID resistance PID stands for potential-induced degradation. Caused by stray currents triggered by certain climate conditions; the phenomenon can cause substantial power loss. A good solar panel will display little or no PID. LID resistance LID stands for Light induced degradation; a process that occurs in the first few months after a solar panel is installed. While this stabilises after a period, it can reduce the amount of power the panel produces. A good solar panel will have little or no LID. Embodied energy Another important aspect to look at is the embodied energy of the solar panel – that is how energy intensive the production of the panel was and how quickly it will have paid itself back by producing more energy.