Your CT Eversource bill is going up — and going down. Here’s how it works and why.

For frustrated Connecticut electricity customers, there’s good news and bad news. The good news is that one portion of their complicated bill will be going down on July 1. The bad news is that a different portion of the bill will be going up — at the same time.

Customers are often confused when they look at the numerous line items on their bill that show different charges that add up to an overall charge. In addition to the confusion, Connecticut has consistently ranked for years near the top for the highest electricity rates in the continental United States. Here are some highlights of the complex system: How does this work? Ever since the market in Connecticut was deregulated more than two decades ago, customers have paid one cost for the generation of the electricity and then a separate cost for the delivery of that electricity to their homes.

Under a pending proposal by Eversource, the largest utility company in the state, the cost for generating electricity would drop from 14.71 cents per kilowatt-hour to 8.99 cents on July 1.

That would remain in effect for six months and must be approved by state regulators at the Public Utilities Regulatory Authority, which has butted heads with Eversource at times on various issues. Eversource and others stress that, under state law, the company makes no profits on the generating cost of electricity because it buys power from other suppliers and then sends it directly to customers. “A lower price for energy is certainly good ne.