Part of it is that high-performance solar cells require single-crystal silicon or gallium arsenide. The purification process for semiconductors is extremely energy intensive. The device fabrication processes are resource and energy intensive as well. But yes, storage is also a huge problem (especially for winter heating, etc.)
Part of it is that high-performance solar cells require single-crystal silicon or gallium arsenide. The purification process for semiconductors is extremely energy intensive. The device fabrication processes are resource and energy intensive as well. But yes, storage is also a huge problem (especially for winter heating, etc.)