That isn't a "price-cap" on electricity, it's a limit to what is essentially a tax routed through electricity bills and given to utility companies, to the tune

That isn't a "price-cap" on electricity, it's a limit to what is essentially a tax routed through electricity bills and given to utility companies, to the tune of about $30 per person per year. The intent of the tax is to improve the grid, although its efficacy is under question, as the article mentions.