What I had in mind was to use a separate solar panel and small inexpensive
regulator  for each battery.  This eliminates the dc/dc upconverter.  This
sounds expensive using 20 regulators, 20 solar panels and 20 batteries (at
12v),  but the regulators are all low power and second hand 33 watt panels
are cheap.  Smaller batteries are easier to handle and if one fails it is
not a huge loss.

I have spoken to people transporting big 2v cells and the problems they
have.

Peter what is a "sine former (using magic sine etc)".  That is the last
piece of the system.

Justin
<snip>

Quite a logical approach, Peter.  You've always got the problem of getting
12V (or other solar cell voltage) to be 120V (or 240 take your pick).
<
>
> Does it not make a lot of sense to use a high voltage DC storage battery
> and a sine former (using magic sine etc) and to charge it with a dc/dc
> upconverter from the solar panels and/or a wind generator and/or mains
> grid and/or generator for such power levels ? Because I think that it
> *significantly* reduces switching and I^2R losses at high load time. With
> ~8-10 24V batteries in series and charge equalization control this could
> supply significantly more than 5kW for a short time. The lower current per
> battery would mean that inexpensive smaller batteries could be bought in
<snip>
> Peter
>

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