and, evidently, you
don't even understand what my modbox is doing, despite devices VERY
CLOSE TO IT already on the market, right now! Have you seen the
extremely small portable jump starter kits that will fit in your
glovebox? They typically run on a 5000MA lithium battery pack
producing less than 12volts usually, and, are somehow able (as if it
were magic) to provide 12volts DC at 400amps (or more) to jump start
your car. Obviously the battery pack they're using doesn't have
400AMPS on it to help you out, but, with some electronics in a very
small physical package, it's able to come up with it.

You're making a guess and extrapolating it and it still doesn't
make the argument.

If your car is in good shape and the battery is good, it will
start in a second or two. If you left your lights on and ran the
battery down slightly, the jump starter can replenish the surface charge
in a few seconds to the point that much of the starting current is
will still coming from the car battery, not the jump starter.

If your battery is DEAD, you probably won't start most cars from
the handheld battery.

No, there aren't electronics that manufacture 400Amps out of thin air.

But that's irrelevant.
It's a battery; it's storage.
Your system doesn't use either.


My modbox is very close to one of those in design principle, except
that it outputs 48volts DC (under load!) at 120+amps with variable
input power from approx 800 to 1200 volts, DC (with approx 3amps!) In
other words, it's emulating a small battery bank.

48V x 120A = 5760W out
1200V x 3A = 3600W in

My math disagrees.
And when a cloud goes by, the system will crash as soon
as the output power required exceeds the input power available
from the panels because you have no storage.

Your box adds cost, losses and does nothing to fix the
power problem. System reliability goes down as the voltages go up.
You are NOT emulating a battery bank because you have no storage.
You have a presumably regulated power supply at 48V output that still
has all the issues
that comes with unreliable solar.
You have gained cost and complexity. You may have reduced wiring
losses, but that's a whole different argument that doesn't address
the unreliability of solar without storage.

There is no free lunch.