i think Biden's plan to remove tariffs on solar panels from china. i suppose means you need to store the energy.
like Aust houses. we have solar panels that are ok in price. but as an investment case the batteries dont make sense at 15-25k aud for a Tesla or Panasonic. and you get paid peanuts feeding energy back into the grid. and the peanut is getting smaller everyday while Victoria energy prices up 100-300%
unless you can afford two electric cars and one stays home and acts as a battery. for discharge at night or next day full charge. though i'd have battery anxiety.