How to Gauge Resident EV Charging Demand Before Your HOA Installs Chargers

It is tempting for a board to react to the loudest resident. One owner buys a Tesla, asks for a charger, and suddenly the board is debating a six-figure infrastructure project. But the most common mistakes in multifamily EV charging come from skipping a basic step: actually measuring how many residents need charging now, and how many will need it over the next five to ten years.

Getting this number wrong is expensive in both directions. Install too few chargers and you face waitlists, frustrated owners, and a second round of construction within two years. Install too many and you have tied up reserve funds in equipment that sits idle, paying for networking fees and demand charges on stations nobody uses. A demand assessment is the cheap, low-risk work that protects you from both outcomes.

The good news: gauging demand costs almost nothing. It takes a survey, a few public data sources, and an afternoon of the board's time. Done well, it becomes the single most persuasive document in your project, the thing you hand to lenders, installers, and skeptical owners at the annual meeting.

A good survey separates the people who own an EV today from those who plan to buy one and those who simply support the idea. These are three very different numbers, and lumping them together inflates demand. Ask directly and let residents self-sort.

Keep it short. A survey that takes more than three minutes gets abandoned. Use a free tool like Google Forms or SurveyMonkey, send it by email and post a paper version in the mailroom, and give a two-week deadline with one reminder. Aim for at least a 40 percent response rate before you trust the results; below that, you are guessing.

Include questions that turn vague interest into planning data:

Surveys capture intent, but intent is optimistic. People say they will buy an EV far more often than they do. Cross-check your survey against objective data so your plan rests on more than wishful thinking.

Start with vehicle registration data. Many state DMVs publish EV registration counts by ZIP code, and services like Atlas Public Policy and the Alliance for Automotive Innovation track adoption by region. If your ZIP code shows EVs at 8 percent of registered vehicles and climbing, that trend will reach your parking lot whether residents predicted it or not. Nationally, battery-electric and plug-in hybrid vehicles made up roughly 10 percent of new car sales in 2024, and that share has grown every year since 2020.

Your own utility can help too. Many utilities offer free EV-readiness consultations and can share neighborhood-level adoption data. Combine these sources with your survey to produce a defensible estimate: for example, '12 residents charge today, 20 more are very likely within three years, and ZIP-code trends suggest 30 percent of our 80 spaces could need charging by 2035.'

Once you have a credible demand number, convert it into hardware. A practical rule for multifamily buildings is that one Level 2 charging port, sharing access among two to four vehicles, covers more demand than boards expect, because most residents charge overnight and rarely need a full charge every day. A single 7.2 kilowatt Level 2 port left connected overnight can replenish well over 150 miles of range, more than most people drive in a day.

This is where the industry distinction between 'EV-installed' and 'EV-ready' saves money. EV-installed spaces have a working charger today. EV-ready spaces have the conduit, wiring capacity, and panel space run during construction but no charger mounted yet. Running the electrical infrastructure once, while the trench is already open, and then adding chargers as demand grows is dramatically cheaper than digging twice. The trenching and electrical work often represents 50 to 70 percent of total project cost.

A right-sized first phase for a typical 80-unit building might look like installing six to eight active Level 2 ports now, while making 20 to 30 additional spaces EV-ready. That matches today's verified demand, leaves obvious room to grow, and keeps the upfront capital request to a number the membership will actually approve.

Demand is a moving target, and the worst plans assume it stands still. Boards that size only for current EV owners almost always find themselves back in front of the membership within two years asking for more money, which erodes trust and usually costs more than building in headroom from the start.

Build a simple growth model. Take your current EV count, apply a conservative annual growth rate drawn from your regional registration trend (many areas are seeing EV adoption rise several percentage points per year), and project five and ten years out. Then make sure your electrical service and load-management plan can scale to that future number without a second panel upgrade. Smart load management lets you add ports without proportionally increasing electrical capacity, because the system shares available power across stations.

Document your assumptions plainly. When the board can point to a survey, registration data, and a written growth projection, the EV charging decision stops looking like a favor to one owner and starts looking like responsible long-term stewardship of the property.

A demand assessment is only useful if it drives a decision. Package your survey results, data sources, and projected installation plan into a one-page summary for the board and the membership. Lead with the numbers: how many residents charge today, how many will soon, and what a phased plan costs.

This document does double duty. It is the backbone of your request for proposals to installers, who can quote far more accurately against a defined demand and phasing plan. It also unlocks financing and incentives, since utility make-ready programs and many state rebates ask for exactly this kind of demand justification before approving funds.

Most importantly, it changes the conversation at the annual meeting. Instead of a vague debate about whether EV charging is worth it, owners see a clear, data-backed plan that meets real demand without overspending. That is the difference between a project that stalls for years and one that gets approved and built.