Building a heat battery for stirling engine

[asherjackson]

Goodday,

I am new on this forum and looking for help.
My situation is that I live in Holland and that I have build a heat battery which should provide energy to a stirling engine to produce electricity.
The machine should produce between 500W and 1000W.
I was in contact whith a firm in Holland but those machines are to expensief in the moment for me to build a prof of concept.
Is there someone in Holland who maken those machines?

Thanks a lot for a responce!