Single crystal: In appearance, the four corners are arc-shaped, dark blue, and close to black after packaging.
Polycrystalline: The four corners are square and light blue. Other differences: different processes, different efficiency and cost.
The most widely used solar panels have the following specifications:
18V working voltage: 10W/30-180W (mainly used in portable small systems and off-grid systems)
30V working voltage: 280W-300W (mainly used in power stations and large water pump systems) 36V working voltage: 400W-550W (used in off-grid systems)
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