Why don't they use renewable energy? Especially given that solar panels are now dirt cheap, they can do most of the installation work themselves (i bet regulatory red tape in Gaza isn't hard LOL!), and they are in the very sunny climate.
$13000 worth of fuel is probably 20K liters in their prices. That is about 700GJ - something you can produce in that climate, given 20% genset efficiency, with about 21KWp of solar panels which will not cost a lot and will fit on their roof. At least it will provide reliable power for laptops throught the day, and for air conditioning except morning and evening times. Maybe worth moving panel orientation so that face more westward so to increase production during evenings when you need more air conditioning than mornings.
$13000 worth of fuel is probably 20K liters in their prices. That is about 700GJ - something you can produce in that climate, given 20% genset efficiency, with about 21KWp of solar panels which will not cost a lot and will fit on their roof. At least it will provide reliable power for laptops throught the day, and for air conditioning except morning and evening times. Maybe worth moving panel orientation so that face more westward so to increase production during evenings when you need more air conditioning than mornings.