Commercial energy broker here - the only 2 'real' costs in your price are the wholesale and supplier costs. Choose suppliers that offer a fully-fixed electricity contract, so that made up variable costs such as distribution, network, etc are all factored into the unit rate that the supplier charges you for your contract. Avoid smart meters at all costs. Renewable / green contracts are always a lot more expensive than standard contracts. I help businesses across the UK get the lowest rates in the market, if it's something you need help with reach out to me - yousaveutilities.co.uk