Have any HOAs (condo buildings) successfully navigated EV charging installation in a shared garage?

Have you tried Googling the subject? I just did and there are a number of articles out there that provide good information to consider. If there's an electric car dealership in yourvatea, they may have done this in other communities and perhaps give you a reference to contact.

I'm on my tablet and can't copy the link to one such article (go to cleantechnica.com and look for a 2019 post on the subject)' but here are some things I think you'll need to consider

To install the charger, you'll have to use the building electric panel. That means running lines along common walks, so this may warrant an exterior change request. before you get there, You might want to establish a committee to research h what would be required and how much all this would cost

You didn't say how many homeowners are interest in this,but the condo board will be looking at cost and scalability. If homeowners want this, they should be willing to pay for it because if the charger is in their spot, they get the benefit.

The type of charger will dictate where the electricity comes from. you can't just plug this in a common outlet, you won't know how much is being used. Consider getting something that will track update so users pay and the community is automatically reimbursed son you continue to share in the buildings common electricity costs.

I suspect if this comes off, there will be an impact on the reserves because of the buildings electrical system, so homeowners may need to accept assessments will have to increase to pay for more money going into the fund. Perhaps a special assessment will be necessary to upgrade it - that affects everyone and If some people squawk, you'll have to deal with that.

All of that said, this will help the environment and maybe attract new owners, raise property values and all that. So get going with you research - have fun and good luck!

-- Citations from Davis-Stirling.com and the Civil Code appear below.

-- That only owners who obtain (via the COA) an EV charging station may be billed for this charging station is clear to me. The sections of the Civil Code saying thusly should be quoted to the EV Committee.

-- Also relevant is any covenant that states that any services provided to one unit and not all units shall be billable to this unit. Quote such covenants as well to the EV Committee.

-- You are not overthinking this. You are sparing the EV Committee would could be a grave mistake that will result in many complaints and inappropriate, large bills to people who should not be billed.

-- I think the only equitable way to do this is to have "rolling billing," re-computed say once every two years, to keep the bookkeeping costs down. For example:

By the end of Year One -- Solicit owners who want a charging station. Explain the estimated cost for initial installation. Explain that the final cost will depend on how many sign up the first year and how many sign up in subsequent years. Require a non-refundable(?) deposit of $5000 per requester. In other words, people have to commit. Start an "EV Ledger" recording how much each owner has paid in. Explain that the EV Ledger will be updated every two years as more owners agree to purchase EV charging stations for their respective units. Explain that every two years, the initial, first year owners will receive rebates consistent with the fact that more owners have purchased EV charging stations. In some years, there will be no rebate, and there may in fact be additional billing, reflecting further maintenance or upgrades, for EV purposes, on the electric panel as needed. Assume that X owners initially commit.

At End of Year Three -- Assume an additional Y owners have had EV stations installed (via the COA) in the last two years. Re-compute the initial cost per owner, using the initial fees divided by (X + Y) owners. Award rebates to the initial X owners. Bill the additional Y owners as needed.

At end of Year Five -- Assume an additional X owners have had EV stations installed (via the COA) in the last two years. Re-compute the initial cost per owner, using the initial fees divided by (X+Y+Z) owners. Award rebates to the initial X + Y owners. Bill the additional Z owners as needed.

And so on.

Of course, where EV is headed is unknown. The algorithm above may need adjustment, and such adjustment is bound to result in some unavoidable inequities. A COA does the best they can, with an eye to the statute and covenants, and so it has a good defense of anyone sues.

About how long will it take to install the "backbone" and run wire to each parking space?

Citations:
https://www.davis-stirling.com/HOME/Statutes/Civil-Code-4745
https://www.davis-stirling.com/HOME/Statutes/Civil-Code-47451
https://www.davis-stirling.com/HOME/EV-Reasonable-Expense
https://www.davis-stirling.com/HOME/Electric-Vehicle-Charging-Stations

(I first posted the above to the thread Californian KerryL1 started in mid-2021. See https://www.hoatalk.com/Search/ForumSearch/tabid/87/forumid/1/postid/306021/view/topic/Default.aspx)

EV is a rapidly evolving commodity. Some if the apartment complexes I patrol have FOB activated with credit card billing chargers in designated first come first servers spaces.
The first thing you need to consider is this is a MASSIVE energy consuming project. Typical condo electric service is delivered about 120 amps per unit from the energy company and a little over for laundry rooms
and pool etc. Can your utility supply you the needed amperage?

The most efficient chargers uses 210v like a water heater, oven or cooktop. Second, service drops need to be installed from each unit to their parking space, a very daunting, time consuming and expensive
task. How are you going to prevent stealing of electricity? What chargers will you use? The additional cost of startup equipment, who will be responsible for it's upkeep, maintenance and replacement?
The increase to the reserves, increase in assessments. You may be looking at $20,000 startup cost per unit, and I don't think that is going to bode well with non EV owners

Get a free quote and go from there. Personally I would hold off until ICE's are no longer produced and everyone is forced to drive EV's, but for the DPRC lt looks like Commiefornia will be
outlawing ICE's in 12 years.

Post-o above. Try this instead:

Califonia statutes prohibit any covenant, restriction yada that prohibits charging stations. If an owner asks for a charging station, the statutes require enormous cooperation from the HOA/COA to ensure the charging station is installed.

The best one's I have seen are those that accept credit card payments for the electricity used.

See:

One Company

another company

There are probably a lot more companies out there.

In my HOA, a town home development, we did discuss this issue. Since parking spaces were assigned, the board felt that a member could install a charging station at their cost in their assigned spaces. The member must wire the station to their electric meter and be responsible for all maintenance, repair, etc. The charging station must be removed at time of sale of the property and the parking area returned to how it was prior to the installation or the new owner must agree, in writing, to take responsibility for the station and adhere to the same terms of the agreement.

We never had anyone formally ask.