At the current price of 500 Naira per litre of petrol, and N110 per liter of CNG, its more economical to run a CNG or LPG powered generator that a petrol powered generator. The image of diesel vs CNG shows the pattern of the economics, for petrol however, the profit margin are higher. But before adopting the usage of CNG or LPG, at least three considerations should be made.

1. Is there available distance of 5 – 25 metres in all directions with no source of ignition fire?
2. How do you intend on preventing or detecting leakages.
3. The capital cost for conversion of a generator to gas type or purchase of a gas generator

For a sample 25KVA generator set running on diesel the consumption of fuel and the cost are shown thus.

For same sample 25KVA generator set running on CNG, the consumption of fuel and the cost are shown thus.

As generated from this table.

For petrol (gasoline), however, the consumption is higher than that of diesel for a 25KVA generator set. Thus, the percent savings are more beneficial if a comparison between petrol and CNG generators is done. It may be easy to think that because CNG cost 110 Naira per liter and petrol cost 500 Naira per liter that CNG is cheaper, but no.

Gas generators consume more litres of gas than diesel or petrol. The number of liters consumed by a gas generator is about 200 times higher than purchased gas. This is because, cng is compressed by about 200 times which is similar to what is done for LPG.