EV Home Charging: I Did the Math—and Saved Hundreds of Dollars

Things I miss about my local gas station:

…

That’s it. That’s the list. OK, fine, I did enjoy the communal squeegees.

This week marks six months since the grand opening of my home electric-vehicle charging station. Congrats to the whole team! (Me and my electrician.) Located between my garage door and recycling bin, it’s hard to beat for the convenience. And also the price.

If you’ve followed my ad-EV-ntures, you’re aware of my feelings about the hell that is public EV charging , at least before Tesla started sharing its Superchargers with its rivals. Truth is, I rarely go to those public spots. The vast majority of EV owners—83%—regularly charge at home, according to data-analytics company J.D. Power.

I already discovered many EV virtues , but I didn’t quite grasp the cost savings until I tallied up half a year of home-charging data. In that time, I spent roughly $125 on electricity to drive just under 2,500 miles. In my old car, that would have cost me more than twice as much—assuming gas held steady at around $3.25 a gallon . And I was charging through the winter, when electricity doesn’t stretch as far in an EV.

Rebates and programs from my state and utility company sweeten the deal. So I will be able to take advantage of discounted electricity, and offset the cost of my charger. The same may be available to you.

But first, there are technical things to figure out. A 240-volt plug? Kilowatt-hours? Peak and off-peak charging? While other people are in their garages founding world-altering tech companies or hit rock bands, I’m in there finding answers to your home-charging questions.

How to get set up

Sure, you can plug your car into a regular 120-volt wall outlet. (Some cars come with a cable.) And sure, you can also simultaneously watch all of Netflix while it charges. It would take more than two days to fill my Ford Mustang Mach-E’s 290-mile battery via standard plug, known as Level 1 charging.

That’s why you want Level 2, which can charge you up overnight. It requires two components:

• A 240-volt electric outlet. Good news: You might already have one of these higher-powered outlets in your house. Some laundry dryers and other appliances require them. Bad news: It might not be in your garage—assuming you even have a garage. I realise not everybody does.

Since my suburban New Jersey home has an attached garage, the install process wasn’t horrible—or at least that’s what my electrician said. He ran a wire from the breaker panel in the basement to the garage and installed a new box with a NEMA 14-50 outlet. People with older homes or detached garages might face trickier wiring issues—more of a “Finding NEMA” adventure. (I apologise to everyone for that joke.)

My installation cost about $1,000 but the pricing can vary widely.

• A smart charger. Choosing a wall charger for your car is not like choosing one for your phone. These mini computers help you control when to start and stop charging, calculate pricing and more.

“This is not something where you just go to Amazon and sort for lowest to highest price,” said Tom Moloughney, the biggest EV-charging nerd I know. On his website and “State of Charge” YouTube channel , Moloughney has reviewed over 100 home chargers. In addition to technical measurements, he does things like freezing the cords, to see if they can withstand wintry conditions.

“Imagine you are fighting with this frozen garden hose every time you want to charge,” he said.

One of his top picks, the ChargePoint Home Flex , was the same one my dad had bought. So I shelled out about $550 for it.

Just remember, if you want to make use of a charger’s advanced features—remote controls, charging updates, etc.—you’ll also need strong Wi-Fi in your garage.

How to save money

I hear all you money-minded WSJ readers: That’s at least $1,600 after getting the car. How the heck is this saving money? I assumed I’d recoup the charging-equipment investment over time, but then I found ways to get cash back even sooner.

My utility provider, PSE&G, says it will cover up to $1,500 on eligible home-charger installation costs . I just need to submit some paperwork for the rebate. In addition, New Jersey offers a $250 rebate on eligible charger purchases. (Phew! My ChargePoint is on the list.) If all is approved, I’d get back around $1,250. Fingers crossed!

I didn’t know about these programs until I started reporting on this. Nearly half of home-charging EV owners say they, too, are unaware of the programs offered by their electric utility, according to a 2024 study released by J.D. Power . So yes, it’s good to check with your provider. Kelley Blue Book also offers a handy state-by-state breakdown.

How to charge

Now I just plug in, right? Kinda. Even if you have a Level 2 charger, factors affect how many hours a fill-up will take, from the amperage in the wall to the current charge of your battery. Take Lionel Richie’s advice and plan on charging all night long .

It can also save you money to charge during off-peak hours.

Electricity costs are measured in kilowatt-hours. On my basic residential plan, PSE&G charges 18 cents per kWh—just 2 cents above the 2023 national average . My Mustang Mach-E’s 290-mile extended-range battery holds 91 kilowatt-hours.

Translation: A “full tank” costs $16. For most gas-powered cars, that wouldn’t cover half a tank.

And If I’m approved for PSE&G’s residential smart-charging plan, my off-peak charging (10 p.m. to 6 a.m. and weekends) will be discounted by up to 10.5 cents/kWh that I’ll get as a credit the following month. I can set specific charging times in the ChargePoint app.

Electricity prices fluctuate state to state but every expert I spoke to said no matter where in the country you live, home charging should cost less than half what gas would for the same mileage. (See chart above for a cost comparison of electric versus gas.) And as I’ve previously explained , fast charging at public stations will cost much more.

One big question: Am I actually doing anything for the environment if I’m just taxing the grid? Eventually, I’d like to offset the grid dependence—and cost—by powering my fancy little station with solar panels. Then, I’ll just be missing the squeegee.

What’s more important than being a good employee right now? Looking like a good employee in the eyes of AI productivity trackers that more managers are using to evaluate their teams.

Employee-monitoring systems are especially popular at tech companies and are also used by other white-collar firms that want to probe how people spend company time. The scary thing: You might not even know you’re being watched because many states don’t require disclosure.

Metrics can include performance data that is undoubtedly relevant, such as sales results. But it also can employ dubious proxies like keyboard strokes and how often your computer screen goes into sleep mode.

We generally accepted, or at least understood, heightened surveillance during the work-from-home era. Back then it seemed reasonable for bosses to keep tabs on employees they couldn’t see.

Yet the oversight has only escalated, and tensions are rising, too.

A group of former Meta Platforms employees alleges in a lawsuit that the company used a “constellation of internal artificial-intelligence systems” when it began laying off about 10% of its workforce in May. Meta says humans make termination calls.

However that case shakes out, a couple of things are clear. Companies eager to gauge which employees are locked in now have sophisticated AI monitoring systems at their disposal. And they believe they have leverage in a tepid labor market.

So while we may chafe at having our worth reduced to numbers on the boss’s productivity dashboard, we have to play the game as it’s being played. Here are some tips, based on conversations with people who make employee monitoring systems—and others who game the systems.

Be meticulous about your calendar

Calendar integration is one way that productivity trackers have gotten more advanced and, ostensibly, fairer.

Let’s say you make an old-fashioned phone call or attend an in-person meeting. Your Outlook or Slack status may switch to “away,” making you appear as inactive as if you were taking an extended coffee break.

Employee monitors like one made by a company called Insightful cross-check your online status with your calendar to see whether there is a valid reason for your apparent inactivity. If that call or meeting is on your schedule, then the system will recognize that you are busy offline. If nothing is on the books, it could look like you’re slacking off.

Hit the activity sweet spot, around 80%

Let’s not go any further without addressing the underlying question: How much downtime is permissible during the workday? After all, people have been scared to let managers see anything non-work-related on their screens since personal computers first arrived in offices.

No one knows this better than Roger Wagner, who is widely credited with creating the first “boss button” in the early 1980s. He designed a keyboard shortcut to instantly display a spreadsheet if the boss walked by your cubicle while you were playing a computer game. Boss buttons have been features of countless diversions since. (I confess to using one built into a March Madness streaming app.)

Wagner, the founder of computer-education company 1010 Technologies, says his original design was a joke—more of a commentary on overbearing managers than a cover for lazy employees. Good bosses understand workers need mental breaks throughout the day, he says.

This matches what I heard from Insightful Chief Executive Ivan Petrovic. He says customers that use his company’s workforce-management platform don’t expect employees to stay on task 100% of the time.

“On average companies are aiming for 60% to 80% of your time being utilized for work during the day,” he says.

Go ahead and exhale. It’s probably OK to watch an occasional YouTube video at your desk.

And if you’re going to artificially inflate your activity level, be careful. Hitting 90% could look suspicious.

Get physical

So don’t leave your mouse jiggler on all day. Choose the right one if you must resort to shenanigans.

There are lots of software applications that mimic the movements of a computer mouse, so you can appear to be working while away from your desk. There are also devices that plug into computer ports and do the same thing.

Corporate cybersecurity systems increasingly block these apps and devices, and productivity trackers claim to be able to detect them. But some workers swear by mouse docks, like one made by Tech8 USA, that keep cursors moving. The company originally made mouse-moving software but now focuses on physical jigglers.

“People are drawn to mechanical solutions because they’re so simple and don’t require software,” says Tech8 Marketing Director Sam Matthews. “As monitoring technology becomes more sophisticated, that distinction has become even more relevant.”

Use AI, but not too much

Another popular metric for employee-monitoring systems is AI usage. Companies want to know who is embracing new tools, and it can be tempting to think more is better.

“There’s a performative aspect where employees overblow their usage of AI so that they appear relevant in the organization,” says Andrea Derler, principal researcher at Visier, which helps companies track and analyze employee work habits.

In a recent Visier survey of 1,000 U.S. workers, 48% admitted to exaggerating their AI usage.

This is already an outdated strategy. Using AI for everything used to score points for experimentation. Now it can seem wasteful because many companies are watching AI token spending more carefully.

Look, productivity theater has always been part of work. Most of us aren’t trying to cheat the system, but expectations are changing so quickly that we need to be savvy about what the latest employee trackers are looking for.

Sometimes it takes a little gamesmanship to get full credit for our contributions.