&quot;It&#x27;s not that simple. Solar is only really practical if it fits into the grid system, otherwise there&#x27;s no real point. The energy it gives you goes up and down, and not in sync with your own household needs.&quot;<p>Doesn&#x27;t the Tesla home battery change all of that ?  Solar on the roof and one or two Tesla batteries in the house and ... no grid usage whatsoever, correct ?