[kkfx]

As a small p.v. user (domestic, wired by myself): tracking Sun gives around 10-20% annual electricity production (witch is meaningless for self-consumption scenario) and a bit earlier and late electricity during the day (you produce earlier in the morning and later in the evening, witch is interesting for self-consumption) but beside the mere cost you need more space: fixed installs need just to count fixed shadows, not static of course, but easy to handle. Rotating means you need more space for one-axis rotation and far more space for two, clustering panels in small groups.

In my personal case I have 12+9 classic chains modules, I need more than 2x physical space to transform them with a dual-axis tracking setup. That means it's cheaper just add some fixed panels eastward and westward to catch extra power earlier and later.

Also in those terms: lithium storage is very expensive BUT for self-consumption is still the cheaper option to have electricity for more time, just arriving to a meaningful production 1/1.5h earlier and later in the day does not help much given it's added cost.

In costs terms: these days it's even cheaper (in TCO terms) having hot water heated by p.v. than the more efficient thermal because that cost more, have more moving parts and regular maintenance that just making an a bit bigger p.v.

The real issue in all cases is that to have enough power to really pay back the investment "quickly" we need much non-shadowed southward space witch can be found somewhere but far from everywhere. A similar issue is for EVs: I like the idea of charging them "for free" from solar, BUT since I normally use a vehicle during the day or I use it only sometimes or I have two or more in a round-robin scheme. Also lithium storage lifetime is an issue, on scale the production capacity and recycling are issues. Until we solve them just produce some more Wh it's meaningless...