Solar Plus EV Charging: Combining Renewables at Multifamily Properties

When residents plug in electric vehicles, a building's electricity demand climbs, and so does its utility bill. A single Level 2 charger used overnight can add 200 to 400 kilowatt-hours of consumption per month, and a bank of chargers across a community can push a property into a higher commercial rate tier or trigger costly demand charges. Rooftop or carport solar offers a way to offset that new load with electricity the building generates itself, often at a lower long-run cost than buying every kilowatt-hour from the grid.

The pairing is more than a billing convenience. Solar production peaks during daylight hours, and in many multifamily communities a meaningful share of EV charging happens during the day too, from visitor vehicles, work-from-home residents, and shared or fleet cars. With smart charging software, a building can steer chargers to draw from solar when the sun is out and shift the rest to cheaper off-peak overnight hours. The result is lower bills and a cleaner charging profile that boards can point to in resident communications.

For an HOA board or property manager weighing the investment, the combined system solves several problems at once rather than one.

A solar-plus-charging setup has three core parts: solar panels mounted on a roof, a parking canopy, or a ground rack; inverters that convert the panels' direct-current power into the alternating current the building uses; and the EV chargers themselves. Tying them together is an energy management system, which is software that monitors solar output, building load, and charger demand in real time, then decides where electricity should flow.

Most multifamily systems are grid-tied, meaning they stay connected to the utility. When solar production exceeds what the chargers and building need, the excess flows back to the grid; when production falls short, the building draws from the grid as usual. Some properties add battery storage to capture midday solar and release it during expensive evening peak hours, though batteries add cost and are not required for a project to pencil out.

For boards, the practical takeaway is that solar and EV charging do not have to be installed at the same time. A property can install EV-ready conduit and chargers first and add solar later, or do the reverse. What matters is choosing chargers and an energy management platform that can integrate with a solar system, so the building keeps its options open as needs grow.

Commercial-scale solar in the United States typically costs $1.50 to $2.50 per watt installed before incentives, so a 50-kilowatt system, large enough to meaningfully offset a mid-size charging deployment, runs roughly $75,000 to $125,000. Parking-canopy mounting adds 20 to 40 percent over rooftop because of the steel structure, but canopies also provide shaded parking that residents value. A Level 2 charging deployment is a separate line item: figure $2,000 to $7,000 per port installed, depending on electrical work.

On the savings side, a well-sized commercial solar system commonly produces electricity at an effective cost of 6 to 10 cents per kilowatt-hour over its 25-year-plus life, compared with 15 to 30 cents or more for grid power in many markets. For a property whose chargers consume 30,000 to 60,000 kilowatt-hours a year, solar can trim several thousand dollars annually from the combined energy bill, and avoiding even one or two demand-charge spikes a month can add hundreds more.

Payback periods vary with local rates and incentives, but boards can use the following ranges as a starting point for budget conversations.

The federal Investment Tax Credit, preserved and extended under the Inflation Reduction Act of 2022, covers 30 percent of the cost of a commercial solar system through at least 2032 for projects that meet labor requirements, and battery storage paired with solar also qualifies. HOAs and condo associations are often nonprofit corporations with little or no tax liability, so the law's elective pay provision, also called direct pay, can let certain tax-exempt entities receive the credit as a cash payment. Many associations instead benefit by partnering with a developer who monetizes the credit and passes savings through a lease or power purchase agreement.

The 30C Alternative Fuel Vehicle Refueling Property Credit separately covers 30 percent of EV charging equipment and installation costs, up to $100,000 per charger, for properties in eligible census tracts. Many states layer on their own solar incentives and EV charging rebates, and utilities frequently offer make-ready programs that pay for the electrical infrastructure behind the chargers. Stacking these programs can cover a large share of total project cost.

Because incentive rules and deadlines change, boards should confirm current terms with a tax professional and the installer before signing. The key planning point is that the federal solar Investment Tax Credit and the 30C charging credit are separate programs, and both can apply to a single solar-plus-charging project.

The most common mistake is sizing the solar system to today's needs rather than tomorrow's. EV adoption at a property tends to accelerate once the first chargers go in, so a system designed only for current demand can be undersized within a few years. Ask the installer to model 5- and 10-year charging growth, and leave roof or canopy space available for future expansion.

Ownership structure also trips up associations. A power purchase agreement or solar lease requires little or no upfront capital, but the building does not own the system and the long-term savings are smaller. A direct purchase costs more upfront but captures the tax credit and the full savings. Either path requires a clear membership vote, careful review of the contract term, which often runs 15 to 25 years, and attention to what happens if the system underperforms or the provider goes out of business.

A short due-diligence checklist protects the association before any contract is signed.

Not every community is an obvious fit, but many are. Strong candidates have an unshaded roof or parking area facing roughly south, a roof with at least 10 to 15 years of remaining life or a plan to re-roof first, electricity rates above the national average, and growing resident interest in EV charging. Properties in states with net metering and solar incentives, such as California, New York, New Jersey, and Massachusetts, tend to see the fastest payback.

A reasonable first step is a no-cost feasibility assessment from a qualified installer, who can pull the building's utility data, estimate solar production, and model how charging load and solar output line up across the day. The board can then weigh a direct purchase against a power purchase agreement and decide whether to phase the work. Pairing solar with EV charging is rarely an all-or-nothing decision, and treating it as a multi-year plan rather than a single capital project usually produces the best outcome for residents and the association's budget.