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Fuel consumption is not the most important factor when purchasing a Diesel generator, but should it be?

why is fuel consumption important|  Constant Power Solutions
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Why is Fuel consumption important when purchasing a Diesel generator?

Fuel consumption is not the most important factor when purchasing a Diesel generator, but should it be?

Whether it be a tender, project or a Diesel generator for personal use. The main factors in purchasing a generator are usually cost of the overall package, brand names (of the generator or the engine) as well as potential service costs and quality. These are all very important, but how often have you factored in fuel consumption and costs? 

Some engines are a lot more thirsty than others. Here at CPS, we can assist you in calculating your annual usage costs for fuel and servicing before you order your Diesel generator.

We list the full consumption on our datasheets of all our generators to give you as much information you require so you can calculate your costs. It is important especially for your Diesel generator that is running constantly or potentially up to 10 hours per day, that you know how much fuel you will be using and your costs. Our datasheets generally will show you the fuel consumption for 75%/100%.

To give you an idea of differences, I will show you a brief chart below comparing two engines – Perkins vs Cummins.

Using the below guide of 250kVA Perkins vs Cummins with 75% consumption, the comparison is quite noticeable.

CPS Model Perkins Engine Fuel Consumption 75% Fuel Consumption 100%
AP250S 1206A-E70TTAG3 41.5 56.9
CPS Model Perkins Engine Fuel Consumption 75% Fuel Consumption 100%
AC250S QSL9-G3 49 59

 

Perkins 1206A engine at 75% will use 41.5 L/hr vs Cummins QSL9-G3 engine will use 49 L/Hr.

Over the course of a week, if you run your generator for 8 hours per day on a 5-day run, that is 300 litres of Fuel extra per week. 

How much will that relate to the additional fuel costs over the course of 12 months?

CPS Model Perkins Engine Fuel Consumption 75% Fuel Consumption 100%
AP30S 1103A-33G 5.61 7.2
AP45S 1103A-33TG1 8.23 10.8
AP60S 1103A-33TG2 10.8 14.6
AP65S 1104A-44TG2 11.2 14.8
AP80S 1104A-44TG2 14 18.7
AP100S 1104C-44TAG2 17.9 22.6
AP135S 1106A-70TAG1 24.1 31.5
AP150S 1106A-70TAG2 29.1 38.2
AP180S 1106A-70TAG3 31 40.2
AP200S 1106A-70TAG4 35 45.2
AP225S 1206A-E70TTAG2 38 51
AP250S 1206A-E70TTAG3 41.5 56.9
AP275S 1506A-E88TAG4 44 56
AP300S 1506A-E88TAG5 47 61
AP350S 2206A-E13TAG2 54 77
AP400S 2206A-E13TAG3 62 81
AP450S 2506A-E15TAG1 72 95
AP500S 2506A-E15TAG2 76 100

 

 

CPS Model Cummins Engine Fuel Consumption 75% Fuel Consumption 100%
AC30S X3.3G1 6.1 8.5
AC40S S3.8G4 8.8 10.4
AC50S S3.8G6 9.5 12.8
AC60S S3.8G7 11 14.7
AC91S QSB5G4 18 24
AC100S 6BTA5.9G5 18 25
AC125S 6BTAA5.9G6 26.6 35.6
AC160S 6BTAA5.9G7 29 37
AC180S QSB7G4 34.5 42
AC200S QSB7G5 36 45
AC250S QSL9-G3 49 59
AC300S QSL9-G5 38.3 52.5
AC320S NT855G6 52 69
AC350S NTA855G4 57 76
AC400S QSX15G4 67 85.7
AC450S QSX15G6 74.3 95.9
AC500S QSX15G8 78 103

Figures are as per the latest data received from the engine manufacturer. Data subject to change.

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