I think this implementation and purpose is slightly different. The climate they are testing in is East Africa. One harvesting is the photovoltaics for energy. B

I think this implementation and purpose is slightly different. The climate they are testing in is East Africa. One harvesting is the photovoltaics for energy. But the second harvesting is for food crops. The partial shade provided by the PV panels allows the plants to lose less water from evaporation and protect against overexposure to sun so that food crops like beans and corn can provide higher yield in a normally difficult climate zone. I agree harvesting the sun as PV + biofuels is a step down, but PV + food crops in a difficult climate zone is a step up.