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Comment Re:Why not both? (Score 1) 236 236

To my knowledge, these converters are still fed from matching AC transformers. Granted, that's mostly because AC is what the whole station is connected to. But since technology keeps marching on, we'll probably see a day when direct LVDC to HVDC converters (for example, for utility-scale PV) will be a commonplace affair.

Comment Re:Solar Powered Aircon (Score 1) 236 236

Too complicated energy pathways. You can't power everything by heat. If your cooling needs are saturated, you can't power anything else with it. So you need a parallel supply of electricity again. And once you have it, why the redundant heat engine in the first place?

Comment Re:Why not both? (Score 1) 236 236

Maybe you could always have a mid-level AC grid or something similar (below long-range HVDC and above municipal DC). I assume that fewer large inverters would be better for the overall economy than every small PV installation having their own stuff.

Comment Re:Why not both? (Score 3, Insightful) 236 236

Possibly, but maybe it's simply cheaper for the manufacturer to simply sell 95% of the same product plus different power interfaces. I've long thought that whole local power grids would switch to DC eventually anyway. With broader deployment of PV technology (and potentially power-to-gas) and improvements of power electronics, it only makes sense.

It is much easier to suggest solutions when you know nothing about the problem.