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Reduced Energy Consumption  compared to the cost of generating it

The average yield of a 2.0 mWh windmill is estimated at 1 MW x 24 hour = 24 mWh per day and with only 200 operational days 4.800 mWh per year. The fuel savings of 14.9 e-Traction® powered buses, with an incremental cost of just €20,000 each, operated for 90,000 KM per year, would yield the same energy generated by a 2 MWh windmill costing in excess of € 3 million each at just 10% of the cost.

KM's KM/L Liters Savings Savings (MJ) No. buses needed to yield savings Investment in buses Investment in buses
Year   Year (liters) Diesel = 38.7MJ  equal to yield 2 MWh Windmill equal to yield Windmill equal to yield Windmill
        per liter (17,280,000 MJ per year)  (20,000 Euro each)  (60,000 Euro each)
60,000 2 30,000          
60,000 4 15,000 15,000 580,500 29.8 595,349 1,786,047
60,000 6 10,000 20,000 774,000 22.3 446,512 1,339,535
90,000 2 45,000          
90,000 4 22,500 22,500 870,750 19.8 396,899 1,190,698
90,000 6 15,000 30,000 1,161,000 14.9 297,674 893,023
120,000 2 60,000          
120,000 4 30,000 30,000 1,161,000 14.9 297,674 893,023
120,000 6 20,000 40,000 1,548,000 11.2 223,256 669,767
150,000 2 75,000          
150,000 4 37,500 37,500 1,451,250 11.9 238,140 714,419
150,000 6 25,000 50,000 1,935,000 8.9 178,605 535,814

Each solar panel cost roughly € 500, covers roughly 1 m2 and, in the Netherlands, effectively produces an estimated 90 W peak/m2 x 3 hours  = 270 W per day, which equals 270 W x 180 days = 48 kW per year. To produce the fuel savings of one e-Traction® powered bus, with an incremental cost of just €20,000, operated for 90,000 KM per year would require 6,719 solar panels costing € 3.36 million and covering 6,719 m2.

KM's KM/L Liters Savings Savings (MJ) No. 1 m2 solar panels equal Cost Energy Yield equalling
Year   Year  (liters) Diesel = 38.7MJ to savings 1 bus if yield one e-Traction® powered Bus
        per liter (172.8 MJ per panel per year)  in solar panels (@ 500 Euro)
60,000 2 30,000        
60,000 4 15,000 15,000 580,500 3,359.4 1,679,688
60,000 6 10,000 20,000 774,000 4,479.2 2,239,583
90,000 2 45,000        
90,000 4 22,500 22,500 870,750 5,039.1 2,519,531
90,000 6 15,000 30,000 1,161,000 6,718.8 3,359,375
120,000 2 60,000        
120,000 4 30,000 30,000 1,161,000 6,718.8 3,359,375
120,000 6 20,000 40,000 1,548,000 8,958.3 4,479,167
150,000 2 75,000        
150,000 4 37,500 37,500 1,451,250 8,398.4 4,199,219
150,000 6 25,000 50,000 1,935,000 11,197.9 5,598,958

The relative cost per megaJoule (MJ) generated by a windmill is 10.1 times higher than the cost of producing the 66.7% fuel savings that can be obtained with an e-Traction® powered bus with an incremental cost of €20,000. A solar panel is 168 times as expensive.

Fuel Installation Investment  Cost (Euro)  Ratio
Savings Cost (Euro) Yield (MJ) per MJ  
e-Traction® System by 90,000 km 67% 20,000 1,161,000 0.0172 1.0
Windmill   3,000,000 17,280,000 0.1736 10.1
Toyota Prius   5,858 9,289 0.6307 36.6
Solar panel   500 173 2.8935 168.0

A conventional bus that uses roughly 45,000 liter per year, while an e-Traction® powered bus uses only a third of that, or 15,000 liter. With the annual fuel savings of one bus alone at least 30 cars can be operated for an entire year, when each uses on average 1,000 liters per year.

In a typical Dutch transit setting, our system would yield annual savings of 30,000 liters (7,925 US gallons) of diesel per bus. The much touted Toyota Prius saves on average 70.5 US gallons when used on average for 10,000 miles per year. The owner is invariably enticed to purchase it with some kind of government incentive, such as a tax rebate, to encourage its purchase. One city bus equipped with our system produces the same CO2 reduction of more than 112.5 such Priuses.

This is not to say that the Prius should not be preferred over conventional cars, because it is definitely better for the environment; the government would, however, be much wiser in tackling its own fuel guzzling mass transit system instead of subsidizing private vehicles that are used relatively little. The investment yield, in terms of energy saved, of the incremental cost of an e-Traction® powered bus is is 36.6 times higher than the yield of the energy produced by a Toyota Prius.

MSRP Average Miles Gallons
USA MPG per year per year
Toyota Prius $20,876 43 10,000 233
Honda Civic LX $13,260 33 10,000