DJI Agras MG-1 Battery and WIND SERIES
The payload of MG-1 is 10L,one battery is enough to spray 1 tank, which consumes 8-12 minutes.
Each battery can cover 6,000-10,000m2 .
So , in one hour, MG-1 can cover 24,000-40,000 m2. And 4 batteries is needed.
The voltage of Spain is 230V which is pretty much the same as China, then one charger can charge 2 batteries at the same time. In fast mode, it needs half an hour, while in normal mode, one hour is needed.
So people usually prepare 8 batteries for non stopped operation of MG-1.