STOR is an abbreviation of Short Term Operating Reserve. It is a service administered and paid for by the National Grid that enables them to optimise the operating margin on the grid by either increasing power generation or by reducing demand from users.

The grid experiences a large fluctuation of demand throughout the day and throughout different times of the year. During periods of high demand, the National Grid will either reduce the demand, or increase supply, to maintain a 20% supply margin. STOR generators provide electricity at points where National Grid requires additional generation at short notice, for example as the result of a power station going off-line unexpectedly.

Armstrong Energy advised Fulcrum Power Limited ( on the launch of its business in 2013. To date Fulcrum Power has constructed a 20 MW diesel power station in Plymouth, and is developing a pipeline of additional power plants.

This website is owned by Armstrong Energy Limited and is for informational purposes only, it does not constitute an offer or a solicitation to invest. Armstrong Energy Limited is authorised and regulated in the United Kingdom by the Financial Conduct Authority (FCA) (no. 612134). Armstrong Energy Limited is registered in England and Wales (no. 07991720).