What should a 2,5 kW generator in a car? With an economical car and streets only suitable for a low average speed entirely enough.
Not everywhere is continuse top speed necessary
Natural, such a small generator would be nothing for a highway without speed limit. Even the Loremo needs nearly 9 kW at 130km/h. But there are other markets and other countries, even in the middle of Europe. Such a country is for example Romania.
Since 1993, I drive regularly to Romania. Travel times are in Romania easy to calculate. Distance divided by 60.
Somebody thinks in Romania always to be very fast underway. 90km/h in the village, 120km/h on the country road. Always overtake other cars.
But after 5 hours driving, one realizes, that there are only 300, maximal 330km behind. There had been also the uphill street with a convoy behind a truck with 30km/h.
With 9 kWh batteries and 2,5 kW generator cross the country
At the Romanian traffic situation, such a small generator can produce 4 kWh for 100km, because it takes 1 hour 40 minutes. When the battery completes with additional 1 kWh for 100, such an electric car with small generator can drive through all the country.
Quality of the generator not important
The Loremo is no typical long distance vehicle. The typical owner will use this car rarely for distances over 150km. Let's take 15.000km per year. For 1000km is a range extension with the generator necessary. Makes only 24 hours generator use per year.