Why should the quality of fuels in the tanks of emergency power systems be checked regularly?

Fuels degrade with increasing storage time. This degradation (aging) is a natural process that occurs slowly under favorable storage conditions. There are some factors that can accelerate the aging of fuels during storage. The most important influencing factors include daylight (UV radiation), storage temperature (heat) and ambient air (oxygen, O2). Another important factor is due to the use of copper lines (introduction of metal ions into the fuel) for fuel supply. In addition, the choice of fuel has an influence, as there are fuels that are less stable in storage than others.