Only the Thalys PBKAs can operate in Germany, the PBAs are limited to France, Belgium and the Netherlands only. e300s do have the Dutch 1.5KV capability (for the French equivalent system) but lack the ATB/ETCS signalling.
It is true that only PBKAs can go to Germany, and PBAs are limited to France, Belgium and the Netherlands
However, the e300s are even more limited, to Belgium and France (and the UK, but that is not relevant for thalys services), which makes them of very limited utility to Thalys, of which almost all services go to either the Netherlands or Germany. And that limitation is a really key difference between the Thalys PBA/PBKA sets and the e300s
I believe what
@Citybreak1 was getting at is that if the additional London-Amsterdam services run, it will require 8 e320s to be pulled off London-Paris/Brussels routes, and therefore 8 additional sets of other stock to be found. They could be other stock shuffled around or retrieved from storage, of course.
That would make some more sense, though I'm not sure how many extra Amsterdam services
@Citybreak1 was expecting, but to require 8 extra e320s that would be quite a number!
I thought eurostar's stock utilisation was relatively low currently, hence the suggestion in some places that Thalys may use some of eurostar's E320s, so presumably they would either increase the use of their operational stock of retrieve from storage
looking at the timetable, the current 4 per day per direction service could be run with 5 trains if there is no sharing trains between routes
the 6:16 departure (arrives Amsterdam at 11:11) could form the 13:47 departure to London
the 08:16 departure (adam arrival at 13:14) could form the 16:47 departure to London
the 11:04 departure (adam arrival at 16:11) could form the 18:47 departure to London
that would leave the18:04 departure from London and the 07:47 departure from Amsterdam as separate trains, giving 5 units in use on the Amsterdam service each weekday with the current timetable
so I'm still curious where this 8 e300s came from