The Spanish company Ebike75 offers different kits to converse normal bicycles to electric bicycles; these components are 100% Made in Spain.
It's not so easy to find homemade components, as a lot of "Made in" are not really made in the country, being mostly Chinese components. But these kits from Ebike75 are 100% made in Spain, more expensive than asiatic products, but with a better quelity and performance.
Ebike75 offers a 250W/36V engine without hall sensors, and a vectorial controller which prevents engine vibrations, so they are softer, less noise and offers a greater autonomy. These engines may also have a regenerative version which increases the battery life by 10-15 %. The engine are incorporated ina Mavic wheel.
Two Samsung battery types are offered. The 9,7Ah good for a range of 40 kilometers, and the 11,6 Ah offers a range up to 60 kilometers.