Demand Side Management Strategy
The implementation of an effective demand side management strategy could help to reduce the required costs for any of the scenarios. If the energy consumption of the household and businesses on the island is controlled and managed then less installed generation will be required to meet the demand. This could be particularly effective for scenario 4, where a high level of investment would be required. Demand side management is currently used effectively; on the Isle of Eigg, where there is no grid connection and all electrical demand on the island is met using relatively low capacity renewable and batteries, with diesel generators as back-up.  

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Full Investigation into Requirements for Anaerobic Digestion
Anaerobic digestion can be a complex process, with many contributing factors determining the potential output of biogas. A full investigation must be carried out if the island is to implement this technology. This would cover land use required, total costs, and a study of all potential inputs to the digester. Many organic substances can be used as a substrate to the digester - food waste, sewage, animal manure, fish farm waste and seaweed are just a few that are available on the island. To accurately determine potential energy output from the process, all potential organic inputs should be quantified. Full economic analysis would also be required, to accurately determine capital costs and payback time. 

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Potential of Immature Technologies
Our contact showing interest in Fuel cells is what lead us to build a case study on fuel cells and show how it would perform on a net energy positive island. The economic feasibility of fuel cells at this moment in time proved not worthwhile but that is not to say it would not be economically feasible in the future. Another technology like this is flow batteries, keeping an eye on these types of technologies and how they advance in the future could have a serious impact on the possible energy system on Gigha for 2030.

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