For now, the best way to do this - in my mind - is to put together a loose metaphor that makes use of battery chemistry to illustrate a particularly befuddling phenomenon that crops up when one ventures into historical analysis, which in this case is - big surprise - the historical analysis of capitalism.
Let's start with the battery chemistry. So this isn't the case with all batteries, but a lot of batteries have 3 distinct stages of charge in which the energy stored in the battery features different dynamics. Smart chargers were developed to account for these three stages, so that the battery could be charged properly to ensure its stability and longevity.
There is a bulk stage, in which the battery is pretty much empty, and so a full voltage and amperage can be used to rapidly charge the battery. There is also an absorption stage, where the battery is getting close to full capacity, and amperage is dialed down to avoid overcharging. Finally there is the the float stage, where the battery is fully charged, and the voltage and amperage are taken down, and the current becomes a trickle, so as to keep the battery charged without overcharging it.
The float stage is an interesting phenomenon for our purposes, especially when using something like solar power. When the battery is in float, you can skim power off of the top and it continuously maintains its charge. You can put a heavier load on it with various electrical applications: the discharge is steadily replaced and the battery charge maintains its robustness. However after it dips below float, the battery enters a steady discharge as you use it. And if the battery just sits, it will self discharge and proceed closer to depletion, so these smart trickle chargers will keep the battery full and in float without overcharging it.
So when you are using batteries that are drawing off of solar power, you generally want to save the bulk of your electrical usage for the float stage, so that the battery is not drained as much and it can recover its charge. If you are using too much power and the battery drops below float, you start hemorrhaging charge and it takes more solar power to get the battery charged back up. This point will become more relevant shortly.
Now, this isn't perfect, but I think the case can be made that late stage capitalism in the core somewhat resembles the float stage, or at least some sort of post-float stage, with some additional dynamics involved as well.
If you look at historical accounts of early capitalism, in the core you'll see a frenzy of industrial activity. These early factories were just completely brutal places, and the factory owners seemed to be in a constant state of desperation to squeeze their workers as vigorously as possible. This is when you'd see vicious struggles to get to something like a 12 or 10 hour or so workday, which looked less agonizing then but excessive now.
I say core because if you look at developing countries today, you do see signs of early stage accumulation which look similar to those of early capitalism. As capital saturates and living standards improve, it must spread out further and into pre-industrial or developing sectors to cheapen its obligations to worker and environment.
In the core, the intensity of extraction has been relaxed somewhat. The infrastructure has been built for numerous types of transportation, there are robust communication networks, there are powerful factories, power stations, machineries, and technologies, and so living standards can improve a bit, and work days can shorten, and we see a greater abundance of consumable goods, at least for the more privileged tranches of the working class.
If this comparative "float stage" looks something like the '60s and '70s, there is a good reason for this. Because with this floating point of relative prosperity - and let's stress "relative" emphatically here - we saw the build up of vast and complex financial institutions that then accumulated greater power, as they skimmed off of the floating charge of the industrial system.
But now we've retreated back to a comparative absorption stage, and finance continues to draw down resources and charge, unable to reverse its extraction. Hopefully there are better ways to conceptualize this historical progression, and we know that it is much more complex than this, but a clunky metaphor can make do for now.
