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900KWH / (400WH/kg ) =2250kg > 2 ton for battery ?

That seem to be non trivial amount of weight.

I am curious how that compare to weight of typical fuel + engine for a small plane.

A pt6a runs 190-225kg dry. But I have no idea how much the combined weight of all engine systems, fuel, etc weigh together.

Also the fuel required to carry the remaining fuel goes down over the course of a gas powered flight, but obviously will not over the course of an electric flight. This would serve to further reduce the range. Curious too!

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