Shared charging station designs: owner experiences

What to take away

• One published case beats ten vendor references on shared charging station designs, because the numbers went into print before anyone knew whether the project would look good.
• Green Rock Apartments in Minneapolis is the most detailed public multifamily case. Its owner chose unnetworked hardware and bundled charging into rent, which removed most of the operational burden.
• EverCharge, Orange Charger, ChargePoint and utility make-ready programs cover the other common designs. Each puts the cost and the control in a different place.
• Green Rock's 2019 costs are a shape, not a quote. Use them to sanity-check a proposal, never to build a budget.
• What transfers between buildings is the reasoning. What does not transfer is the price.

Most of what owners hear about shared charging station designs comes from people selling it. Published owner experiences are rarer and more useful, because the numbers were written down before anyone knew whether the project would look good.

The Department of Energy's multifamily procurement case study of Green Rock Apartments in Minneapolis is one of the most detailed records of a shared charging build-out in the country. Read it in full. It dates from 2019, and some of it has aged.

Four other designs show up in public program filings and provider material: EverCharge's load-sharing network, Orange Charger's bare outlets, ChargePoint's fully networked ports, and utility make-ready programs such as Con Edison's in New York.

Green Rock Apartments, Minneapolis: what the owner did

Green Rock, a Minneapolis multifamily developer, equipped four buildings. One received a DC fast charger supplied free through a manufacturer incentive program, with the owner covering installation labor. Three more buildings and the corporate offices got Level 2 units. By January 2019 the equipped buildings covered 97 housing units.

Two choices shaped everything that followed. They chose unnetworked chargers, specifically to avoid the cost of a networked system. And they made charging free to tenants, folding it into rent, with free parking for residents who drove electric.

What Green Rock's charging cost in 2019

The published figures were roughly $600 per Level 2 unit and roughly $400 per unit to install. The owner also ran a tenant incentive of $2,000 toward an electric vehicle purchase, which 15 tenants used.

Treat those numbers as a shape rather than a quote. They are seven years old, they reflect Minneapolis labor, and the installations were simple enough to sit in that range. Your building may be nothing like that.

What the figures are genuinely useful for is a reasonableness check. If a proposal for a comparable simple installation comes in at many times this, ask what your site is doing that theirs was not. Six things usually explain the gap, and they are worth knowing before you make that call.

Why unnetworked worked at Green Rock

This is the part most worth understanding, because it is the decision most owners get wrong in both directions.

Networking exists to authenticate users, bill them, and manage load, but Green Rock needed none of that. Charging was free, so there was nothing to bill, and access was limited to residents, so the parking arrangement handled authentication, not software.

Public access was for emergencies only. That combination is one of three configurations worth pricing separately, and it is cheapest by a wide margin.

Remove billing and access control and a networked system is largely paying for features nobody uses, plus a subscription, plus a dependency. It also collects almost nothing, which quietly settles most of what a board would otherwise have to decide about session records.

The case reports no equipment problems across five years, on standard warranties. Maintenance amounted to watching for misuse and clearing snow. That is what a system with very few moving parts and no software layer looks like when it works.

Four other shared charging designs, and what owners run into

EverCharge. The company, now owned by SK Group, builds shared charging around load sharing. A building can add ports without a utility service upgrade, which is often the largest single line item in a garage project. Owners keep a network and skip the biggest electrical cost.

Orange Charger. This design puts a bare 240-volt outlet at each space. The company lists hardware in the hundreds of dollars per port, plus a monthly fee per port. Nothing authenticates and nothing bills, so tenants plug in and the owner reads the electric bill.

ChargePoint. A fully networked system with subscription fees, resident billing and session records. It suits buildings that need per-driver billing or load control. It also carries the dependency risk that Enel X Way customers met in October 2024, when that company said it would wind down its North American charging business.

Utility make-ready programs. Con Edison's EV Make-Ready program in New York funds electrical make-ready work at multifamily buildings and pays an incentive toward eligible chargers, with amounts set in its current tariff. Southern California Edison runs a similar program. The owner buys the chargers and sets the price; the utility pays for the wire behind them.

Design	At the parking space	Who bills the driver	What the owner pays for
Green Rock, Minneapolis	Unnetworked Level 2	Nobody; rent covers it	About $600 per port in 2019, plus about $400 to install
EverCharge	Networked Level 2 with load sharing	The owner or its operator	Ports, with no service upgrade
Orange Charger	240-volt outlet	Nobody	Outlets in the hundreds per port, plus a monthly fee
ChargePoint	Networked Level 2	Usually the operator	Ports plus a subscription
Con Edison make-ready	Owner's choice of Level 2	The owner sets it	Chargers; the program funds make-ready

None of these four carries a dated, published cost breakdown the way Green Rock does. That gap is the reason the Green Rock numbers keep getting quoted. Treat a provider's case study as marketing until it shows a date, an access model and a problem.

What this does not tell you

Free charging bundled into rent suits a rental owner treating charging as an amenity. It does not transfer to a condominium. There, owners will object to subsidizing neighbors through common fees. It does not scale either: a modest electricity increase across 97 units at low adoption becomes a real budget line as more residents switch.

Snow clearing is worth noting too. It appears here as routine maintenance because Minneapolis made it unavoidable. In a warmer city it would not appear at all, and in a garage the equivalent risk is vehicle impact rather than plows.

The owner's own summary was that the chargers were, in his words, "a major draw for tenants," with a modest rise in electricity costs. That is an amenity argument, not a revenue one, and it is honest about which it is.

Reading any case study properly

• Check the date first. Equipment prices, connector standards and incentive programs have all moved.
• Find the access model. Free, billed, resident-only or public changes every other number on the page.
• Look for what is missing. A case study with no problems section usually means the site conditions were easy, not that the technology is flawless.
• Separate the reasoning from the result. Why Green Rock chose unnetworked hardware transfers to your building. What it paid does not.
• Check who owns the software. Enel X Way's 2024 North American exit left networked owners hunting for a migration path.

If you are looking for programs that fund this kind of work today, several jurisdictions run pilot programs aimed specifically at multifamily housing, which are a better guide to current funding than a seven-year-old budget.

For the layouts themselves, the design patterns worth considering cover the physical options, and comparing those options against each other is where a shortlist gets made.

Common questions

Are those 2019 prices still realistic? Use them only as a sanity check. Equipment, labor and code requirements have all changed since.

Should we make charging free like they did? It works for a rental owner treating it as an amenity at low adoption. It gets expensive as uptake grows, and it is hard to justify in a condominium.

Is unnetworked really viable? Yes, when you are not billing residents individually and access is controlled by parking. It fails the moment you need per-user billing or load management. Orange Charger sells the outlet version of that design, and EverCharge sells the networked version with load sharing.

Where do I find more case studies? The Alternative Fuels Data Center publishes them alongside its other multifamily material. Prefer documented cases to vendor references, which are chosen rather than published.