Submit a charging query If you have a query related to charging, please use the form below and we'll get back to you within the next business day. Before you submit your query, you might want to visit our guidance page. Company Name Email Phone Query category - None -Balancing Services Use of System charges (BSUoS)Transmission Network Use of System charges (TNUoS)Connection chargesAssistance for Areas with High Electricity Distribution Costs (AAHEDC)Other What is your question?