Solar power expected to dominate electricity generation by 2050—even without more ambitious climate policies::In pursuit of the ambitious goal of reaching net-zero emissions, nations worldwide must expand their use of clean energy sources. In the case of solar energy, this change may already be upon us.
With high efficiency DCDC converters now cheap and good, we totally could do it.
So the issue is that nothing wants the same DC level. You have one device that wants 12V, another that wants 48V, and another that wants 5V. You end up with layers of conversions that each take an efficiency hit. Better to have one AC line and convert at point of use like we do now.