1) San Servolo Beer & Spa resort, Buje - exclusively Giant bicycles
2) Hostel Parenzana Triban, Buje - exclusively Bosch bicycles
3) Kanal, Motovun - Bosch, but with an adapter is possible to charge other bikes too
4) Turistička zajednica Kaštelir-Labinci - exclusively Bosch bicycles
5) Valamar Diamant Hotel, Poreč - exclusively Bosch bicycles
You can find all e-charging stations in Istria here.