Multifamily EV Charging Done Right: Lessons from Boston's 64-Charger Installation

Property managers across North America face the same question: how do you provide EV charging for dozens of residents without overloading your electrical system or eating into your operating budget? A recent 64-charger installation at a Boston multifamily property demonstrates that large-scale resident charging is not only possible but increasingly necessary to stay competitive.

With EVs representing 9.4% of new vehicle sales in Massachusetts and multifamily residents making up 40-50% of urban populations, the charging infrastructure gap creates a real competitive disadvantage. Properties without charging options lose residents to buildings that offer it, and the gap is widening.

Why Multifamily EV Charging Is Different from Single-Family Solutions

Single-family homeowners install one charger, upgrade one panel, and call it done. Multifamily properties manage dozens of residents charging simultaneously on shared electrical infrastructure, often in buildings designed decades before EVs existed.

The National Renewable Energy Laboratory reports that only 6-8% of U.S. multifamily properties currently offer charging infrastructure, despite 80% of EV charging happening at home. That mismatch creates a bottleneck for urban EV adoption and leaves property owners wondering how to close the gap without six-figure panel upgrades.

Boston's 64-charger installation addressed three core challenges that every multifamily property faces: electrical capacity constraints, cost distribution between owners and residents, and equitable access across different parking arrangements. The project used smart load management technology to deliver Level 2 charging across multiple parking levels without replacing the building's main electrical service.

What Does Smart Load Management Actually Do?

Smart load management systems monitor total building electrical load in real time and dynamically allocate available capacity across active charging ports. When demand is low (overnight, for example), each vehicle charges at maximum speed. When demand peaks, the system reduces power to each port proportionally so no resident is left without charging access.

This approach eliminates the need for expensive electrical service upgrades in many cases. Instead of installing enough capacity to run every charger at full power simultaneously (which rarely happens), the system intelligently shares existing capacity. For the Boston property, this meant avoiding a $150,000+ panel replacement while still delivering overnight charging for 64 vehicles.

The alternative, hardwired Level 2 stations with fixed power delivery, would have required extensive electrical work and limited the number of ports the building could support. Portable solutions paired with standardized NEMA outlets offered a more flexible and cost-effective path forward, allowing the property to install charging infrastructure in phases as resident demand grew.

How Do You Structure Costs Between Property Owners and Residents?

The most common barrier to multifamily EV charging is not technical but financial. Who pays for installation, and how do residents reimburse the property for electricity? The Boston project used a hybrid model that distributed costs logically between stakeholders.

Property owners covered infrastructure costs (electrical panels, conduit, outlets) as a building improvement, treating it like any other amenity upgrade. Federal IRA tax credits offset 30% of these costs, and Massachusetts utility Make-Ready programs covered 100% of distribution-side infrastructure expenses. That dramatically reduced the owner's out-of-pocket investment.

Residents purchased their own portable Level 2 chargers and adapters, giving them full control over charging speed and portability. This eliminated the need for expensive networked charging stations with subscription fees and allowed residents to take their equipment with them when they moved. The property installed submetered outlets so residents paid only for the electricity they used, billed monthly through their utility account.

This model aligns incentives. Property owners invest in infrastructure that increases building value and rental appeal, while residents invest in equipment they control and can relocate. The National Multifamily Housing Council reports a 25% premium in lease rates for units with guaranteed charging access, making the owner's investment economically rational.

What Electrical Infrastructure Do You Actually Need?

The first step in any multifamily charging project is a load analysis. A qualified electrician measures current electrical demand, identifies available capacity, and determines how many charging ports the existing system can support before requiring upgrades.

For the Boston property, load analysis revealed enough spare capacity to support 20-25 chargers on the existing service. To reach 64 ports, the property installed a dedicated subpanel for EV charging, connected to the main service but isolated from residential circuits. This approach protected core building systems from EV charging load and simplified future expansion.

Key infrastructure decisions included:

• Installing NEMA 14-50 outlets at each parking space to support up to 9.6 kW Level 2 charging
• Running conduit in a hub-and-spoke pattern to minimize installation labor and simplify troubleshooting
• Mounting outlets at consistent heights with weather-rated covers to meet IP67 standards for outdoor installations
• Installing individual circuit breakers for each outlet to isolate faults and enable remote shutoff if needed
• Future-proofing conduit runs with oversized pathways to accommodate additional circuits as resident demand grows

Because the property used portable chargers rather than hardwired stations, residents could upgrade their own equipment over time without requiring new infrastructure work. A resident starting with a 120V portable charger could later switch to a 240V setup by simply swapping adapters, using the same outlet.

How Do You Handle Residents Without Dedicated Parking Spaces?

Not every multifamily resident has an assigned parking space, yet equitable access to charging is both a legal requirement in Massachusetts and a practical necessity for tenant retention. The Boston property addressed this by installing charging infrastructure in both reserved and general parking areas.

For reserved spaces, outlets were installed adjacent to each spot, and residents managed their own charging schedules. For general parking, the property installed a cluster of outlets on a first-come, first-served basis, with residents required to move their vehicles within 8 hours of plugging in. This prevented any single resident from monopolizing access and kept chargers available for rotating use.

The property also implemented a waiting list system for residents interested in charging access but without immediate availability. As demand grew, the property added outlets in phases, expanding from 20 ports in year one to 64 ports by year three. This staged approach kept upfront costs manageable and matched infrastructure growth to actual resident adoption rates.

Massachusetts right-to-charge laws prevent property owners from unreasonably restricting tenant charging installations, so implementing a clear, fair access policy before residents start requesting individual accommodations protects both parties and avoids disputes.

What Are the Ongoing Maintenance and Management Requirements?

Once installed, multifamily charging infrastructure requires minimal ongoing maintenance if designed correctly. The Boston property's approach using resident-owned portable chargers shifted equipment maintenance responsibility to residents themselves, while the property maintained only the electrical infrastructure (outlets, panels, conduit).

Annual maintenance tasks included visual inspection of outlets and covers, verification of circuit breaker function, and confirmation that submetered billing matched actual usage. Because portable chargers like the J+ BOOSTER 2 include built-in fault detection for seven fault types, residents received immediate LED-indicated warnings if charging issues arose, reducing the property's troubleshooting burden.

The property also established clear policies for outlet access, prohibiting extension cords (a fire and tripping hazard) and requiring all charging equipment to carry ETL certification to UL standards. These policies protected both residents and the property from liability while ensuring safe operation across all charging ports.

Multifamily EV charging is no longer optional for competitive properties in urban markets. Boston's 64-charger installation demonstrates that scale is achievable without prohibitive costs or operational complexity when infrastructure is designed around flexibility, resident ownership, and smart capacity management. Properties evaluating charging solutions should prioritize equipment portability, electrical efficiency, and cost structures that distribute investment logically between stakeholders.

For detailed specifications on portable charging equipment suitable for multifamily installations, visit jplusbooster.com or contact the sales team to discuss property-scale deployment.