Background: The world is facing major challenges to become sustainable and many ofthose are connected to the use of fossil fuels. Today’s environmentally friendly energy technologies are established increasingly, often in big investments by nations to provideto the electric grid. The conditions to replace fossil fuel-based solutions with sustainableones are, however different depending on the settings and requirements. One example of tough conditions are where there is a need for electricity, but no grid to rely on. The operations need to be fully self-sustaining on electricity, which comes with challenges. The solutions today are often to use a diesel generator. There is much research on conversions to sustainable alternatives to diesel generators, but only for long term use, usually in remote villages. A blind spot in the research topic is where the need for short-term andoff-grid electricity, for example, construction sites or infrastructure investments. Objectives: The aim of his research is to examine the conditions for sustainable solutions to replace electricity generators where there is no grid to rely on and short-term. The conditions are examined from a decision maker perspective to understand how decision-makers value and chooses electricity generators. Methods: The execution of the research aimed to get an educated understanding of which characteristics that are important for electricity generators under the the circumstances of short-term and self sustaining electricity need. Interviews with decision-makers at companies that are in these settings are conducted to identify underlying reasoning for how they value electricity generators and why. Further, this understanding and the characteristics are analysed with the theory of creative destruction and product diffusion. Results: The results shows that reliability, a robust value chain, price and portability is important characteristics that decision-makers value for these solutions and that sustainable options are perceived as lacking of those characteristics.Conclusions: From what users are aware of, the conditions for sustainable electricity generators to replace fossil-based ones do not seem promising today in the settings ofoff-grid and short-term operations, even though there is a demand among some for it to happen.