Calculating Genset Savings

The cost saving will depend upon the tariff and the nature of other loads on site.

On a straight payment-by-kWh tariff, the savings will be 49.5kWh/day multiplied by the tariff price of a kWh at whatever time the pump is off.

On other tarriffs, the savings are more difficult to calculate.

Thanks PWSlack, The tariff is proportional to the cost of diesel and the efficiency of the genset. My question is more about whether the fact that I am saving three times more kVA than kW delivers an additional financial saving (i.e. the genset uses less fuel) or does it just increase capacity? Toffeeman

The savings will be due to the reduction in kWh consumed for the pump load and that part of the pump load current that is dissipated as heat in the supply cables to it, which is a function of cable size and distance. So, yes, the genset will burn less diesel after the modification, though it is difficult to quantify at this distance.