Outside Barajas airport in Madrid can be seen solar panels on top of the Repsol jet wash bays. Look closer and it’s clear that these are not solar PV electricity generators which have appeared on petrol station canopies over recent years but water heaters for supplying warm water at the jet wash nozzle.
By using solar water heaters in this way Repsol will gain from offsetting the cost of either a gas fuelled heater or an electricity fuelled heater. Savings will be manifest not only as reduced energy bills but reduced maintenance costs for conventional heating apparatus.
...but why not communicate the environmental benefits more obviously?
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