The grid is not made of copper. You thought it was? Copper is for home wiring, if that. Up to that point, it's alumium, bundled with steel on major lines for tensile strength. Does it look like copper to you?
As for the article: grid operators don't build out grids on a lark. They do it to sell power, because they make money selling power. If people want to buy more power because they want to charge an EV, then that's more money available for them. EVs are a boon to grid operators. They're almost an ideal load. Most charging done at night, steady loads, readily shiftable and curtailable with incentives, etc. Daytime / fast charging isn't, but that's a minority. And except in areas with a lot of hydro, most regions already have the ample nighttime generation capacity; it's just sitting idle, power potential unsold. In short, EVs can greatly improve their profitability. Which translates to any combiation of three things:
1) More profits
2) A better, more reliable grid
3) Lower rates
* ... depending on the regulations and how competitive of an environment it is.
As for the above article: the study isn't wrong, it's just - beyond the above (huge) problem - it is based on stupid assumptions. Including that there's zero incentives made for people to load shift when their vehicles charge, zero battery buffering to shift loads, and zero change in the distribution of generation resources over the proposed timeframe. All three of these are dumb assumptions.
Also, presenting raw numbers always leads to misleading answers. Let me rephrase their numbers: the cost is $7 to $26 per person per year. The cost of 1 to 5 gallons of gas per year at California prices..
