IMVHO that's a bit of a wrong evolution, personally having a small p.v. domestic system I do prefer things that eat much and constant energy for a short time so I can schedule it when the Sun shine and the produced energy is MUCH more than my needs.

More expensive systems to consume less are logical in cities or for things that can't be scheduled, when p.v. and other renewable with similar output characteristics can't be used.

Much of the rest is just not for efficiency but for sell cheaper crap for the OEM at a bigger price for the customers.