Question about Exide start-stop AGM

Probably not because it is a starter battery.
For a solar installation it is recommended to use deep cycle batteries which are designed to withstand deep discharges.

The supplier does not recommend this battery because it does not last long.

He recommended this battery instead: Bosch Power Battery 12V/75Ah/650A (12 V, 75 Ah)

Hello, having no experience in solar I can't answer. It is perfect for starting a large engine, is the only thing I can say.
With kind regards.

So it won't work at all, or it will have to be charged less between each charge cycle?

I'm going to make a request to the product department, I'll get back to you as soon as I have an answer :)