Why amorphous panels perform well in low light

Multi-crystalline panel operating voltage is between 14 - 18 volts. If the voltage falls below 13.5 volts charging voltage, the battery cannot be charged because of back emf. Energy produced is dissipated by the controller, ie wasted.
Amorphous panel have peak operating voltage of 62 volts. As voltage drops in low light the voltage output it is still well above 13.5 volt. Energy produced can still charge the batteries.
Solar panel efficiency itself should not be the indicator when choosing panels. More important is the total useful power produced.

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