The main issue here with charging stations is competition. A utility would be able to charge much lower rates to charge than a 3rd party who has to pay retail rates for demand and electricity charges. For QC stations - the killer cost is demand charges. Demand charges can run up to $25 / kW during peak times. So a single QC during peak hours would cost the QC owner $1250 / month. But demand charges are what the utility makes money off of - they are required to directly pass energy costs to the consumer without markup. SDG&E actual cost for a single 50 kW peak-charge is much lower than $1250 - so they would have an inherent advantage over anyone else trying to sell QC services.