Some customers manage multiple SolarNetwork accounts, typically to segregate their own customers into isolated accounts. It would be nice to be able to link all the accounts so that SN generates a single invoice for the customer that contains all the line items for all linked accounts. All usage must still be calculated as it is today: per account. Consolidation is simply a means to tally up the total amount of several invoices, so a single payment can be made referencing the one consolidated invoice.