EV Charging Rates Are Coming in NH

As we speak, proceedings are underway that will determine whether you’d be able to fuel up an electric vehicle and how much it will cost in New Hampshire. Three dockets are open at the Public Utilities Commission that will determine how much the utilities spend to prepare the grid for public fast-charging, whether there will be a business case for fast-chargers, and what it will cost to charge at home.

Here in this post, we’ll give you the basics of EV charging policy: why these dockets are necessary and what they’re trying to accomplish, and how EV charging can help the grid if we get these policies right.

First, Why It Matters

Why rob a bank? It’s where the money is. If reducing emissions is the goal, then transportation is where it’s at. As power sector emissions have fallen, those from transportation have remained flat.

Source: NH DES

Want more reasons? How about the fact that Consumer Reports found that driving an EV saves you something like $7,000 over the life of the car because of cheaper fuel and less maintenance? How about the fact that switching to EVs will literally save lives?

The future is cleaner, better, cheaper, but we'll need good EV charging policies to unlock all of this potential.

Demand Charges and Fast Charging

In the biz we call fast charging Direct Current Fast Charging, or DCFC. When folks who don’t own an EV think about reasons why they wouldn’t get one, the lack of fast charging infrastructure is high on their list.

While it's pretty rare that you need the entire range of your EV's battery, fast charging is important for tourism, road trips, and for getting people comfortable with the idea of owning an EV, and so more DCFC is an important catalyst for EV adoption.

That’s why the NH utilities’ proposals for DCFC electric rates are a real problem. The consultant that Clean Energy NH hired in partnership with the Conservation Law Foundation to review these proposals, recommended rejecting them. When I spoke with him in November Chris Villareal told me, “their heart is kind of in the right place, but what they’ve proposed is not going to work for the time frame of what we’re going to see for EV adoption rates.”

For customers that use a lot of electricity, utilities have a special billing mechanism called a demand charge. Demand charges reflect the fact that pulling so much electricity off the grid requires expensive grid upgrades. But they also cripple the economics of DCFC stations. Clean Energy NH learned last year, for instance that some of the few fast charging stations we have in New Hampshire pay the equivalent of $3.08/kWh, which is something in the neighborhood of 15 to 18 times what you likely pay per kWh at home.

The Rocky Mountain Institute has found that until there are enough EVs driving around that a car is plugged into a fast charger 30 percent of the time, demand charges will continue to be so expensive that they will make DCFC unprofitable. It's a chicken and egg problem: no fast charging makes it so people are afraid to get an EV, and no EVs make fast charging uneconomic. That’s why states around the country are proposing demand charge “holidays” until there are more EVs on the road.

But "they did not propose that in New Hampshire," Villareal points out, “In New Hampshire they proposed a simple three year increase over time, regardless of how it’s used.” This is why we recommend the PUC reject the utilities proposals, and come back with something more grounded in the reality of the pace of EV adoption in NH.

Time of Use Rates and Slow Charging

First, some EV charging lingo. Level 1 charging is when you simply plug your car into a standard wall outlet. That provides up to 6 miles of range per hour of charging. Level 2 is more like a dryer outlet, which provides around 35 miles per hour of charging. Compare those to DCFC, which can add 150 miles or more in an hour.

While fast charging occupies a lot of space in people’s thinking about owning an EV, slow charging will actually be the bread and butter. Currently, somewhere in the neighborhood of