Original research study
The garage as the new utility room
Federal survey data on where home EV chargers live, and how often they need a 240-volt circuit older garages were never wired for.
Written by HyreGarage Research Desk Primary-source research and data analysis
Audited by HyreGarage Research Desk Citation, computation and retrieval-date audit
The finding
About 1.39 million US households (1.12%) charged an electric vehicle at home, and 75.6% of them have an attached garage. That is from our weighted count of EIA’s 2020 Residential Energy Consumption Survey (RECS) microdata.
Just over half of these households (51.3%) use a Level 2 charger, which needs its own 240-volt circuit. The other 48.3% use an ordinary 120-volt outlet.
What we found
The garage is where home EV charging happens, and this is now a measured federal number, not a guess. EIA’s 2020 RECS finds that 1,385,302 US households charged an electric vehicle at home. That is 1.12 percent of all 123,529,025 occupied homes.
75.6 percent of those households have an attached garage. So home EV charging sits mostly in the space this site covers.
Just over half need more than a normal outlet. RECS asks each home-charging household which charger it uses. 51.3 percent use a Level 2 charger, a 240-volt connection on its own circuit. 48.3 percent still use a Level 1 charger on a standard 120-volt outlet.
We do not stretch this to home batteries or water heaters, because RECS cannot support it. The survey has no home-battery question at all. Its water-heater fields do not record whether a unit is a heat pump.
What does this page claim, and what does it not?
Every number comes from real questions in one federal survey. Nothing is padded with claims it cannot support.
RECS 2020 has no home-battery question. Its water-heater fields do not separate heat pump units from standard ones. So we kept this page to what the data measures, rather than estimate the other two.
RECS 2020 describes homes at the time of the survey. The EV-charging questions were added to the public file in a January 2024 update, but they still describe 2020 respondents. Today’s rate is almost certainly higher than 1.12%.
City permit records for EV charger and panel-upgrade jobs could add local detail. The RECS microdata answers this page’s questions on its own, so we used no permit records.
RECS confirms the home has an attached garage, and separately that it charges at home. No single field confirms the charger is mounted inside that garage, though that is by far the usual place to install one.
Whether your home needs a panel upgrade for Level 2 charging depends on your panel’s spare capacity and local code. A licensed electrician answers that for your house, not a national statistic.
The RECS 2020 EV-charging numbers in full
We computed every figure from the public survey file, weighted to represent all US homes.
| Measure | Weighted figure |
|---|---|
| Total U.S. households (occupied housing units) | 123,529,025 |
| Households charging an EV at home | 1,385,302 (1.12%) |
| Of those, with an attached garage | 1,047,715 (75.6%) |
| Of those, using a Level 2 (240V) charger | 51.3% |
| Of those, using a Level 1 (120V) charger | 48.3% |
EIA RECS 2020 public microdata, variables EVCHRGHOME, PRKGPLC1 and EVCHRGTYPE, weighted using NWEIGHT. Retrieved directly as a CSV, no API key required.
Why the Level 1 vs Level 2 split matters for your garage
A Level 1 charger plugs into a standard 120-volt outlet. Most garages already have that kind of circuit for a light or a shop tool. It needs nothing new, which is why it is still close to half of home setups, even though it charges slower.
A Level 2 charger is different. It needs a 240-volt circuit, the same kind an electric dryer or range uses, serving only the charger.
In an older home, an electrician often has to check whether the main electrical panel has spare capacity. Some homes then need a panel upgrade, or a load-management device, to add the circuit safely.
HyreGarage analysis: at 51.3 percent, Level 2 is the more common of the two, not a niche.
So most home EV setups involve the kind of electrical work that turns a storage garage into something closer to a small utility room.
If you are thinking about an EV, plan for your panel before you buy the car, not after.
Terms used on this page
- EVCHRGHOME
- The RECS 2020 question on whether a household charges an electric vehicle at home. It is the source of the 1.12% national figure.
- Level 1 charger
- In RECS’s own words, a "typical household 120 volt outlet". No dedicated circuit or electrical work beyond an existing standard outlet.
- Level 2 charger
- In RECS’s own words, a "higher-powered 240 volt outlet". The same voltage as a dryer or range, needing its own circuit and often a check of panel capacity.
- NWEIGHT
- The survey weight on each household record. It lets about 18,500 real respondents stand in for all 123.5 million US households.
What does each charger level take to install?
From the Department of Energy’s (DOE) consumer guidance, checked against the RECS survey definitions.
Level 1: usually nothing to install
DOE’s Alternative Fuels Data Center says Level 1 charging "requires no additional cost or installation, provided that a power outlet on a dedicated branch circuit is available near their parking location."
If your garage already has a standard outlet, you plug in and go. That is why Level 1 is still close to half of home setups.
Level 2: usually needs an electrician
The same DOE source: "A licensed electrician can install a 240-volt electricity outlet for level-2 charging at home and ensure that any existing 240-volt outlets are safe for vehicle charging."
That is real, paid work. It can mean running a new circuit, checking whether the main panel has room, and installing an outlet rated for the steady load of EV charging.
A safety warning from DOE
DOE warns against charging an EV through an ordinary extension cord, even on Level 1. It says EV chargers "contain thicker wires that can handle more power than smaller gauge wires in typical extension cords, and using an extension cord increases the risk of fire, overheating, and electric shock."
This matters in any garage where the nearest outlet is not right next to the parking spot.
What to check before adding a garage EV charger
Five questions to answer before you assume the install is simple.
Not every EV or driving pattern needs Level 2. DOE says 8 hours of Level 1 charging can add about 40 miles of range to a mid-size EV. That covers many households' daily driving.
If one exists, Level 1 charging may need no new work at all, per DOE’s guidance.
A dedicated 240-volt circuit adds real load. An older home’s panel may need checking or upgrading before it can safely carry the charger and your existing appliances.
DOE warns against it because of fire, overheating and shock risk. Ordinary cords are not rated for hours of steady EV charging current.
For the 51.3% of home chargers on Level 2, the charger itself is often the smaller cost next to the electrical work behind it.
Why chargers end up in the garage, not the driveway
Home EV chargers cluster in attached garages (75.6 percent) rather than driveways, carports or other parking spots. The main reason is how houses are built, not what owners prefer.
An attached garage is part of the house, so it is close to the main electrical panel. Running a new circuit a few feet from the panel is a fairly simple electrical job.
Running the same circuit to a detached carport or an open driveway often means longer conduit, weatherproofing and sometimes digging a trench. That is more work and more money for the same result.
HyreGarage analysis: so chargers cluster in attached garages not only because cars already park there. It is also the easiest path for Level 2 wiring. A home with a detached garage, or no garage, faces a different and often more expensive install than the national averages here describe.
How this page relates to our EV fire research
Our EV charging garage fires page found, from NTSB and NFPA sources, that no federal dataset isolates a garage EV-charging fire rate. That is the safety side of this same shift.
This page is the other side: not whether garage EV charging is dangerous, but how common it already is and what electrical work it usually takes. For what the national fire data does show, see our garage fires study.
Together, the two pages describe a real change in many American garages. A space first wired for a light and perhaps one outlet now hosts, in over a million homes, a 240-volt circuit carrying steady current for hours. That change is real, whatever the safety data turns out to show.
What we could not find, and so did not write
How many homes have battery storage. RECS 2020 has no question on home battery systems (such as a Tesla Powerwall). We found no similar federal survey question and did not estimate one.
Heat pump water heater adoption. RECS records water heater tank size, fuel type and age. We could not confirm a usable field that separates a heat pump water heater from a standard electric or gas unit, so we did not publish a heat-pump figure.
EV home-charging rates after 2020. EV ownership has grown a lot since 2020, so the 1.12% figure almost certainly understates today’s rate. We did not project a current estimate, because that would need growth assumptions this page does not try to model.
City permit data for EV charger or panel-upgrade jobs. Permits would show local install counts. We did not collect them; every figure here comes from RECS.
Whether the EV is the main car or a second one. RECS records whether a household charges at home, not how the EV is used next to its other vehicles. This page cannot describe main-versus-second EV ownership.
What a panel upgrade or Level 2 circuit costs. RECS does not collect install costs. The price depends on panel condition, the distance from panel to garage and local labor rates. A licensed electrician’s quote answers that, not a national survey.
Questions
How many US households charge an electric vehicle at home?
What percentage of home EV chargers are in a garage?
Does an EV charger need an electrical panel upgrade?
What is the difference between a Level 1 and Level 2 EV charger?
Does this page cover home batteries and heat pump water heaters?
Is the 1.12% EV home-charging figure current?
How much range does Level 1 charging add overnight?
Can I use an extension cord to charge my EV in the garage?
Written and audited by
HyreGarage Research Desk
Primary-source research, data analysis and fact checking
We are not a garage door company. We read the agency file, the code record, the standards document or the public register ourselves, compute the figure from it, and publish it with the source and the date we retrieved it.
Where a number cannot be traced to a primary source, we publish the shorter page and say what we could not verify. Our own company records cover ten states; nothing national is ever derived from them.
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- garage door companies in the store
- 457
- license records verified against a state board
- 0
- national claims made from a ten-state store
How this desk works
- Primary sources only. Injury counts come from CPSC. Housing counts come from the Census file, not from a summary of it. Code history comes from the building commission that adopted the code. We do not cite an article that cites a source; we retrieve the source and do the arithmetic ourselves.
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- No DIY instructions for spring, cable or track work. Those components hold enough stored energy to cause serious injury, and CPSC records the consequences. We describe what has failed and what a competent repair involves; we do not tell you how to do it.
Data as of EIA 2020 Residential Energy Consumption Survey microdata, retrieved 2026-09-06. Authorship on this site is organizational: the analysis belongs to the desk rather than to a named individual, and we do not publish credentials we do not hold. Our editorial policy sets out how we source, date and correct what we publish.
Sources & retrieval dates
Planning a garage EV charger?
Ask a licensed electrician to check your panel before you assume a Level 2 charger just plugs in. For just over half of home setups, it does not.
HyreGarage is not a garage door company, an electrician or an energy auditor, and does not perform, supervise or warrant garage door or electrical work of any kind. This page reports published federal survey statistics. It is not an electrical assessment of any home, and any electrical work should be done by a licensed electrician.