Electric forklift replace battery with EV battery

[hanermo]

Yes, but no.
Really, really, no.
You are quoting a 15 kW controller -- the tesla does 700 kW peak, and 400 kW sustained.

Find me a 400 kW sustained controller under 200 lbs .. and smaller than a refri.

A couple of things... First, this is not a thread about Tesla's design or manufacturing innovations. Second, most modern industrial motor controllers are quite compact even though they're relatively highly rated. For example, you can take a look at Sevcon Gen4 Size 6 controllers which are rated for 650A (11lb package).
Finally, here is an example of a DC-DC converter one would have to use to run a forklift from a battery of the "wrong" voltage:

https://www.zekalabs.com/products/isolated-power-converters/dc-dc-isolated-converter-15kw-400a

(40lb package, couldn't find the price, but likely many thousands)

 

[crickets]

Yes, but no.
Really, really, no.
You are quoting a 15 kW controller -- the tesla does 700 kW peak, and 400 kW sustained.

Find me a 400 kW sustained controller under 200 lbs .. and smaller than a refri.

My friend... One more time. There is no point in talking about Tesla's accomplishments here. You said voltages can easily be converted with DC-DC, I showed you an example of a DC-DC "suitable" for use in an application that's being discussed here.

Whether it is 400kW or 700kW, limiting factor is the current. At 400V 400kW is just 1000A, and like I stated earlier, compact industrial controllers are routinely handling 400-600A.