FCOM > DSC > 29 > 10 > 20
NOTE On each system, the electric pump flow is about 18 % of the engine-driven pump flow capacity. It can be used to retract the surfaces, but should not be used to replace the engine-driven pumps.
You're overthinking things but what can happen? Worst case scenario the pump overheats and catches fire. The electric pumps are not the same as the engine driven ones.
https://www.flightglobal.com/airbus-...es/789.article