Scaling Back the Electric Vehicle Charging Incentive Will Reduce The Ability to Cope with Increasing Electricity Demand
The eligibility for the residential incentive to offset the cost of buying and installing a 240 volt charger has been significantly reduced. This is what is happening and why it matters. SB4, the bill that made the changes, is a poster child for penny-wise, pound-foolish legislation, at least for the EV portion of it.
The image at the top of the post is from United Illuminating, illustrating how load shifting mitigates demand peaks. Building for peak demand is what disproportionately drives up costs. More on this below.
Electrify Everything
If we are to be serious about reducing emissions, we must electrify everything (along with greening the grid). That adds up to a lot of potential electricity demand. We are seeing this most acutely in the near term with data centers, but it applies across the board. The challenges are not just about generating the power but having a distribution infrastructure that can handle it, preferably without having to spend a fortune to completely rebuild it. The cost of transmission and local distribution – the poles, wires, and transformers that bring electricity to homes already accounts for a large portion of an electric bill. A recent Eversource bill, where these are itemized as “Transmission” and “Local Delivery,” shows a charge of about 4.3 cents per kWh for transmission and 5.6 cents per kWh for local delivery, or about 9 cents in total, comparable to some of the better generation deals on EnergizeCT. The backbone of our grid is technology that was built a long time ago. There are newer technologies and strategies that can mitigate the amount of upgrades needed, though there is a long way to go in terms of deployment.
EV Electricity Usage
There are 67,656 registered EVs in the state as of July 1, 2025. An updated number is due out shortly, which will likely add another ~7 or 8,000. But what if we get closer to the state goal of 500,000 in a few years, equal to roughly 23% of the state light duty fleet? An EV is like having another appliance in the home. This is appliance-level data compiled by the U.S. Department of Energy from 2020.
If we take this 2363 kWh and multiply it by 500,000 EVs, it totals to 1,181,500 MWh. That’s a lot of juice. But using it does not have to stress the grid. The simple reason is that most charging can occur during off-peak periods. And Eversource and UI pay EV owners to do this. It is called “managed charging,” and it incentivizes you to avoid charging during non-holiday weekdays from 3-9PM. According to the American Council for an Energy-Efficient Economy (ACEEE), “the fastest and cheapest way to alleviate rapid electric load growth is through expanding investment in energy efficiency and demand flexibility.”
Background on the Eversource and UI EV Charging Incentive
Managed charging was introduced as part of an incentive package that the Public Utilities Regulatory Authority (PURA) approved that took effect in 2022. It offers an incentive of up to $1000 for the purchase and installation of a 240-volt (level 2) EV charger.
There are a number of rules. Only approved charging equipment is eligible (chargers that have been vetted through an RFQ process). Most importantly, taking the incentive requires participation in managed charging. The managed charging incentive pays either $120 annually for the base level tier or $300 for the advanced tier, which is more automated and involves using an app to set charging times. These are annual incentives. It is also possible to enroll in managed charging without having a compliant charger if the vehicle is able to connect via telematics.
Because Eversource and UI use different back-end vendors, there can be different chargers that are eligible and different vehicles that are telematics eligible. At this time, the charger lists are the same. These lists are changeable. These are the current lists for both utilities.
Eversource Approved Chargers
The EV Club fielded a lot of questions when the program first launched about why the Tesla chargers were not included. The reason was that Tesla had not submitted them for approval. All of these are WiFi connected chargers that allow monitoring of charging.
UI Approved Chargers
Eversource Approved Telematics Vehicles
There is a $100 enrollment incentive for telematics participation without getting the charger incentive. There are a lot of EVs slated to be introduced this year. They aren’t on the list at this time but are likely to be in many cases once deliveries begin.
UI Approved Telematics Vehicles
The Most Important Part Of The Incentive
While the headline incentive is $1,000, the big strategic win for the utilities is the load-shifting that comes from managed charging. It is part of a future that also includes distributed generation and dispatchable storage, and is how the grid can be more flexibly managed. A small vehicle to grid pilot program that is just getting started, the virtual power plant incentive for stationary storage, are other steps toward extending dispatchable storage beyond grid-scale batteries.
Not only does off-peak charging help avoid the necessity of building additional distribution infrastructure, it has the potential to lower ratepayer bills. A study commissioned by the state several years ago conducted by MJ Bradley and Associates, modeled that if EVs become widely adopted and mostly charge off-peak, that revenue could cause the utilities to exceed their permitted rate of return. The overage would be returned to ratepayers.
Public Benefits Charge and SB 4
The summer of 2024 brought a perfect storm. The Combined Public Benefits Charge (CPBC) of the Eversource and UI bills spiked, mostly due to the Millstone rate adjustment and the recoupment stemming from the pandemic moratorium on account shut-offs. The CPBC, like the other charges, is billed on a per kWh basis. During a hot summer, when AC use was high, so was the charge. This led to public anger, and of course, the opportunity to turn it into a political football.
For a deeper dive into the details of the CPBC, this is an explainer that was published by the CT Mirror last spring, and this is an excellent video made by Andy Bauer for the CT Energy Network that details many of the good things that are supported by the CPBC.
The anger of the summer carried into the legislative session in 2025 and from that emerged SB4. In part, the bill removed some of what is covered in CPBC and shifted those items to general obligation bonds. It lowers utility bills but the cost has to be borne by the taxpayers at large, along with interest charges. One of the items, accounting for a fraction of a cent per kWh, was the EV charging program. In the process, the program sustained cuts. The residential single-family incentive is now restricted to households earning no more than 3 times the federal poverty level or those living in concentrated poverty census tracts. (For those who qualify, the incentive amount increased from $1,000 to $1,500 but the number of allowable chargers has been decreased from 2 to 1 per household.)
The Bigger Picture
The managed charging part of the program remains intact and funded via CPBC. However, without the ability to enroll people by providing an incentive to offset the cost of an EV charger, the biggest point of leverage to get people into the program is now compromised. The enrollment rate in managed charging will invariably decline.
Again, referencing the ACEEE, “making energy use flexible is a critical way to save money and reduce peak demand. Over the next decade, deploying load flexibility measures—like shifting EV charging or most water heating to off-peak times—could reduce peak demand by 60 to 200 gigawatts, an amount up to double the most aggressive projections of total U.S. data center capacity by 2030…”
The EV charging incentive that was developed by PURA, and which the utilities have been publicly supportive of, had this bigger-picture thinking in mind. As we move into this election year legislative session, where affordability is top of mind, the CPBC, even in its shrunken form, is already a subject of discussion, including proposals to dispense with it entirely. Let’s be smart about this!
Eversource is holding a webinar about the current status of the residential charging incentives on February 27th at noon. It isn’t listed on their calendar yet, but will be soon. The Eversource and UI programs are the same, except for potential differences in approved equipment due to different vendors.