Going Solar on the GU wagon

[Brissieboy]

DC electrons don't like being pushed through long solid metals (larger strands).

Actually the individual conductor size has no impact for DC or low frequencies. It only effects the flexibility or ability to withstand movement or vibration.
It is only with high frequencies where 'skin effect' occurs which make the conductors appear electrically smaller and multiple small strands or better than fewer large ones.
It is primarily the overall size or cross-sectional area, but also flexibility, that is important here.