With the style of net meter in the article is makes sense to install a battery because it allows you to sell back power during the times you get the full rate.

With the style of net meter in the article is makes sense to install a battery because it allows you to sell back power during the times you get the full rate. But yes otherwise you are right the return on investment will benefit smaller systems. Since any additional power would simply be wasted. Now the new standards typically don't fully get rid of paying for additional power. So it is probably still best to build a system that covers your power usage for most of the year and get a small benefit when it is over producing.