You can use higher efficiency solar panels that can produce more electricity from the same amount of sunlight. This can help reduce the impact of weather on the farm's electricity output.❤❤
You should buy a few rolls of Geotextil "PRETO normally rols of 100m or 200m , you can by in many places in Portugal and then put the stones on top starting from entrance. This should solve the problem.
Generator - Look at the warranty before you try to repair, as you may invalidate it, and then have no chance of getting it fixed by the folks you got it from or getting your dosh back. Then you at least make a decision as if it is worth you trying to fix.