How to Install Home Charging for Two EVs

Installing two EV chargers at home begins with two vehicles and two parking routines, not two identical wall boxes. One household may meet both departures by sharing a single connector. Another may need a plug at each parking position but only a modest aggregate charging ceiling. A third may need independent simultaneous charging because both vehicles return with substantial energy deficits and leave again within a short overlapping window.

The design must connect four records:

1. how much energy each vehicle normally needs restored;
2. when each vehicle is actually parked and available to charge;
3. where each vehicle parks and how a connector reaches it safely; and
4. how the home’s circuits, feeders, service and any approved controls handle the combined load.

This guide owns that two-vehicle decision. The Level 2 charger installation guide owns general equipment, circuit, routing, permitting and quote scope. The EV load-management guide owns the broader choice among existing capacity, lower output, controls and electrical upgrades. This page applies those inputs to two vehicles without promising fixed amperage, charging time, connector compatibility, a supported product, a service upgrade, savings, tariff outcome or approval.

Two-EV home charging options at a glance

Start with the operating tradeoff, then ask whether the exact equipment and electrical design support it.

Architecture	How two vehicles receive energy	Where it can fit	Evidence before choosing
One EVSE, one connector	Vehicles take turns; an owner moves the connector or changes parking sequence	Long parking windows, predictable priority, connector safely reaches both positions	Two-vehicle energy/window test, exact connector fit, cable/parking plan, human workflow
One exact dual-connector EVSE	Product allocates energy between two connectors under its documented design	Both vehicles park within approved cable reach and product behavior meets priorities	Listing/manual, connector compatibility, branch/topology, allocation and failure behavior
Two EVSEs on independent circuits	Each vehicle can request charge; combined demand enters the electrical design	Strong need for operational independence and verified capacity	Load calculation, two circuits/routes, exact configured outputs, simultaneous test
Two EVSEs under product-supported group sharing	Compatible units share a documented aggregate ceiling	A connector at each space matters more than maximum simultaneous output	Exact models/versions, topology, group limit, communications, allocation and failure response
Sequential or priority control	One vehicle charges first or only one receives power at a time	Different departure priorities or limited aggregate capacity	Listed/control basis where used for capacity, durable priority, schedule-conflict and failure tests
Service-level aggregate management	A listed system measures a defined electrical point and adjusts EV charging	EV charging must remain within a service/feeder/conductor ceiling as household loads vary	Certification, meter/reference point, controlled EVSEs, ceiling, fault behavior and commissioning
Lower configured output	One or both EVSEs use less than their advertised maximum	Long parking windows and modest daily energy deficits	Vehicle energy analysis, durable settings, circuit design and ready-by-departure scenarios
Capacity work	Panel, feeder, service or utility work supports the chosen architecture	Existing topology/condition or calculated capacity requires it	Qualified design, exact scope, utility boundary, permits and acceptance
Staged or no project	One EVSE now, pathway for later, Level 1 for one vehicle, or other charging fallback	Second vehicle/space is uncertain or current needs are already met	Current safe setup, explicit future trigger and no unsupported compatibility promise

No row is automatically better. Two independent circuits provide more separation but can impose a larger simultaneous continuous load. Group sharing can reduce aggregate demand but creates exact-product and control dependencies. One connector can be electrically simple but operationally fragile if a driver must wake up to swap it.

The selection is ready only when normal and stress-case energy windows, parking routes, electrical capacity, control behavior and owner responsibilities agree.

Build a separate charging-duty record for each EV

Do not use household vehicle count as a load calculation. Record each exact vehicle’s year, make, model, trim, current manufacturer AC-charging documentation, inlet/connector, onboard AC acceptance, and behavior at lower charging output. A vehicle can accept less than an EVSE advertises, and its battery-management system may vary charging for temperature, state of charge and other conditions.

For each vehicle, gather:

• recent daily and weekly driving, including a high-use but credible day;
• vehicle- or EVSE-reported charging energy where available;
• normal arrival, plug-in and departure times by day;
• days when it parks elsewhere or uses workplace/public charging;
• minimum energy or state needed at departure;
• normal target and whether charging to that target is necessary every night;
• early-departure, late-arrival and back-to-back trip cases;
• seasonal cabin-conditioning or temperature effects without inventing a fixed penalty;
• inlet location and normal parking orientation; and
• which vehicle receives priority if both requests cannot be met.

EPA’s current home EV charging calculator uses vehicle, daily distance and available charging hours to estimate a minimum charging need. For a real two-EV design, improve that estimate with each vehicle’s recorded energy and parking data. Do not simply add advertised range or multiply maximum EVSE power by time.

Use energy, not just miles. A useful planning equation is:

required average charging power at the vehicle-side planning boundary ≈ energy deficit ÷ available charging window

The qualified design then accounts for conversion/charging losses, vehicle acceptance, circuit/control limits and actual equipment behavior. This is scenario math, not a promised completion time.

Create at least four scenarios:

1. normal separate nights — only one vehicle needs meaningful energy;
2. normal overlap — both arrive and request their usual energy;
3. stress night — both have credible high-use deficits and overlapping departures; and
4. exception — late arrival, early departure, one vehicle unavailable to move, or one EVSE/control offline.

A design does not have to eliminate every exception. It must identify the fallback—priority charging, workplace/public charging, an earlier plug-in, a different vehicle assignment, reduced travel, or another plan the household accepts.

Draw the overlap window before selecting output

Two vehicles may be parked for many total hours but share only part of that time. Draw a simple daily timeline for each vehicle:

Time block	Vehicle A	Vehicle B	Charging implication
Before first arrival	Away	Parked or away	Can B charge before A returns?
Both parked	Available	Available	Simultaneous, shared, or priority allocation applies
Before first departure	Available or leaving	Available	First-departure target controls priority
After first departure	Away	Available	Remaining capacity can shift to the parked vehicle

Repeat this by weekday/weekend if patterns differ. Record the plug-in window rather than assuming parked means connected. A vehicle may be in the garage but blocked by cable reach, used again after dinner, parked behind another car, or intentionally unplugged.

The combined energy requirement is not simply divided by the whole night when each vehicle has a different deadline. Allocate energy to each departure. A priority controller can be useful when the early vehicle needs a smaller but earlier allocation, while the later vehicle has a longer recovery window.

Check whether utility or vehicle schedules shorten the usable window. Two independent vehicle schedules can conflict with EVSE schedules. A homeowner may set both cars to begin in the same period, unintentionally creating the maximum overlap. A utility demand-response event or current tariff schedule may change operation, but never assume enrollment, savings or control behavior. Verify the serving provider, exact program, equipment and owner consent.

If the energy/window record shows that one lower-output connection can meet both vehicles with a reasonable swap or parking workflow, two circuits may be unnecessary. If the record shows both vehicles routinely need energy during the same short window, a one-connector plan may be operationally unsuitable even if electrically feasible.

Decide whether one shared EVSE is realistic

One EVSE can serve two vehicles sequentially when the exact connector path works and the household can reliably decide which vehicle charges when. This is not the same as a dual-connector product, and it is not automatic load management. Only one vehicle can use a single connector at a time.

Test the physical workflow with both vehicles parked normally:

• Can the cable reach each inlet without pulling tight?
• Does it cross a walking path, garage-door track, driveway, sidewalk or another vehicle?
• Must a vehicle be reversed or moved to reach?
• Can the connector and cable be stored without ground contact, pinching or impact?
• Does opening a door, trunk, hatch or garage door conflict with the cable?
• Can the later-arriving vehicle block the earlier-departing vehicle?
• Is the connection suitable for the actual environment and weather exposure?
• Does the exact connector fit both vehicles without an unsupported adapter assumption?

Then test the human process. If Vehicle A finishes after occupants are asleep, will anyone transfer the connector? Can the EVSE or vehicle alert reliably, and does that alert depend on internet, an account, a phone setting or a cloud service? If the household will not move the connector overnight, model the vehicles as receiving separate nights or only the first vehicle charging.

One shared EVSE can be a robust staged approach when the second vehicle is uncertain. The project can install a safe route, mounting location and exact equipment for today’s vehicle while documenting possible future parking and pathway conditions. It should not promise that a later vehicle, adapter, second unit or power-sharing feature will be compatible.

Evaluate a dual-connector EVSE as an exact product

A dual-connector EVSE can place two cables at one equipment location, but two plugs does not reveal its electrical behavior. An exact product may charge both simultaneously under an aggregate ceiling, allocate power by its own logic, charge sequentially, or impose vehicle/connector/network conditions. The listing, manual and approved installation control.

Before choosing one, request:

1. exact model, hardware revision, firmware and connector versions;
2. safety listing/certification and approved connection method;
3. branch-circuit and upstream topology;
4. maximum aggregate setting under the approved design;
5. how output is divided when both vehicles request charge;
6. whether priority can be configured and by whom;
7. minimum allocation and what happens when available power is low;
8. behavior when one vehicle finishes, pauses or reconnects;
9. offline, communication, sensor and internal-controller failure behavior;
10. vehicle/access-control/adapter compatibility evidence; and
11. required accounts, network, updates and ongoing support.

ENERGY STAR’s EVSE product criteria require safety listing by a nationally recognized testing laboratory for certified EVSE, while connected/demand-response functionality is optional and separately identified. ENERGY STAR certification does not prove that two connectors share power in a particular way or fit both vehicles.

Compare a dual-connector device with two grouped EVSEs on installed scope, not marketing simplicity. Cable reach may be worse from a single central box. A fault may affect both connectors. Replacement may remove all home charging. Conversely, separate units can require more wall space, routing and commissioning. The actual trade belongs in the proposal.

Compare two independent EVSE circuits

Two independent EVSEs can give each vehicle its own connector, location, settings and circuit. This can reduce the need to swap cables and can preserve one charging path if the other EVSE fails. It also means both vehicles can request charge at the same time, so the combined continuous load must be addressed.

DOE’s Alternative Fuels Data Center home-charging guidance says EV charging is treated as a continuous load under the National Electrical Code and that a qualified electrician should determine adequate home capacity. For two independent EVSEs, the design must evaluate both configured outputs, their branch circuits, upstream feeder/panel/service limits, other loads and any applicable control.

An empty breaker position is not proof of capacity. Two empty positions are not proof of capacity twice. The qualified review should document:

• service, meter, main disconnect, panel/bus and feeder ratings/configuration;
• applicable load calculation and both EV charging loads;
• physical equipment condition and available circuit positions;
• conductor, protection, grounding/bonding and connection method;
• route to each parking position;
• simultaneous household loads and credible future loads;
• utility-controlled service/meter/transformer questions where relevant; and
• exact settings and how unauthorized increases are prevented.

Independent circuits do not require identical outputs. Vehicle A may need more energy in a shorter window while Vehicle B can use a smaller durable setting. Symmetry can be visually attractive but should not replace the energy/window record.

If the calculation or equipment condition does not support the desired arrangement, compare lower configured output, supported group sharing, listed aggregate control, panel/feeder/service work or a staged plan. Do not jump directly from two vehicles to service upgrade.

Treat product-supported group power sharing as a system

Group power sharing generally means multiple compatible EVSE units coordinate so their combined output remains under a configured group ceiling. Each parking position can have a connector while the group distributes available output among vehicles.

This is product specific. Tesla’s current power-management documentation, for example, separates static, dynamic and group features and limits group compatibility to identified equipment. That is evidence that exact models, generations, topology and configuration matter. It is not a product recommendation, a compatibility statement for the reader’s vehicles, or evidence that Sunburst installs the equipment.

A group design record should identify:

• every EVSE model, version and connector;
• branch-circuit arrangement allowed by the exact instructions;
• group leader/controller and follower roles, if any;
• aggregate ceiling and electrical basis;
• output-allocation/priority logic;
• minimum output or pause behavior;
• local wireless, wired or network communication paths;
• effect of adding/removing/replacing an EVSE;
• firmware and commissioning requirements;
• behavior when a unit, leader, network or communication fails;
• whether settings persist after power loss or updates; and
• who owns accounts, configuration, updates and troubleshooting.

Do not assume two smart chargers from the same brand can share power. Do not mix product families because their apps look similar. Do not count an owner-set schedule as a group ceiling unless the exact listed/approved design allows that function to control the applicable electrical load.

Test allocation with both vehicles requesting charge. Then let one finish, unplug/reconnect it, change vehicle priority where supported, and confirm total demand remains within the approved ceiling. Record actual settings and results in the handoff.

Separate group sharing from service-level load management

Two controls can solve different constraints:

• group power sharing limits or allocates output among a defined set of compatible EVSEs; and
• service- or feeder-level load management measures a defined electrical point and adjusts charging as other household loads change.

A group ceiling can protect its assigned circuit or allocation under an approved topology without proving the whole service stays within a separate limit. A service-level controller can reduce aggregate EV load based on household demand without proving the two EVSEs allocate energy fairly or meet both departures. Some exact systems may coordinate both functions; others may not.

UL Solutions explains that UL 3141 addresses power-control-system safety and performance. Its technical discussion of PCS applications describes controlling loads at defined service, feeder, bus/conductor or EVSE limits. Require the exact certification/listing, measurement point, controlled equipment and design ceiling.

For any aggregate PCS, request:

1. what current/power is measured and where;
2. which EVSEs and other loads are controlled;
3. which service, feeder, conductor, bus or circuit limit is protected;
4. sensor/meter/controller/communications architecture;
5. response time and operating range from exact documentation;
6. fail-safe or fault behavior supported by its listing/design;
7. minimum charging behavior when household demand is high;
8. interaction with EVSE group allocation and vehicle schedules;
9. access to settings and change controls; and
10. commissioning tests under real household load changes.

Smart charging, load balancing, energy management, demand response and power sharing are not interchangeable proof. Define the actual safety function and commercial/owner convenience function separately.

Use sequential charging and priorities deliberately

Sequential charging can mean a person moves one connector, two EVSEs are scheduled for different periods, or an exact controller assigns only one vehicle at a time. Those are different designs.

Build the priority rule from departures and consequences:

• earliest departure first;
• minimum departure energy first, then share remaining time;
• work-critical or accessibility vehicle first;
• largest deficit first only when it will not starve an earlier departure;
• alternate nights under a stable travel pattern; or
• owner override with a clear effect on the other vehicle.

Write what happens when priorities conflict. If both drivers mark their vehicle urgent, does the controller split output, choose a fixed first connector, use an arrival order, or require an owner decision? If one vehicle does not accept charge when assigned, does the other receive the capacity? Does a schedule use home time, vehicle time, app time or utility-event time?

Schedules can improve convenience, but they are not automatically recognized load controls. A clock can drift, a vehicle schedule can override or conflict, an owner can change an app setting, or a cloud service can be unavailable. If electrical safety/capacity depends on sequential operation, the exact approved control must enforce the aggregate condition independent of informal household behavior.

The proposal should distinguish preference from protective ceiling. A preferred departure target may be missed without creating an overload. A protective ceiling must behave as designed even when both drivers request maximum charge.

Lower configured output can be a complete design

The largest EVSE output is not the default requirement. EPA’s May 2026 home charging guide identifies lower-output Level 2 charging, load management/circuit sharing, and capacity upgrades planned around multiple EVs as distinct options.

For each vehicle, test whether a lower durable setting restores the normal energy deficit within its actual window. Then test both vehicles under the normal-overlap and stress-night cases. The result may support:

• two lower-output independent EVSEs;
• one lower and one higher output tied to different duty;
• a shared aggregate ceiling that rises for the only active vehicle;
• sequential charging that meets both departures; or
• a known exception/fallback rather than permanent infrastructure sized to a rare event.

The setting must be part of the electrical design and protected from casual change. Record whether configuration is installer-only, account-controlled, locally accessible, hardware-based or software/firmware-based. Identify what happens after reset, replacement or update.

Do not promise charging time. Actual energy transferred depends on starting state, battery temperature/conditioning, vehicle acceptance, taper/control behavior, conversion losses, EVSE allocation, household-load control, schedules and interruptions. Model ranges and verify operating behavior during commissioning.

Let both parking positions shape cable and equipment placement

Electrical feasibility does not make a poor parking design acceptable. Draw both vehicles at realistic scale and in normal orientation. Mark each charge inlet, EVSE/connector, cable sweep, wheel path, door/hatch swing, garage door, walking path, step, drainage, wall/floor surface, impact exposure and route from panel.

Test common disruptions:

• vehicles switch spaces;
• one backs in and the other pulls in;
• a longer vehicle replaces a current one;
• garage storage returns after installation;
• both vehicles open doors/hatches while connected;
• a visitor or third vehicle occupies one space;
• rainwater or irrigation reaches the connector area;
• a cable crosses between vehicles or under a door; and
• landscaping, fencing or a gate affects an outdoor space.

Cable reach should be comfortable without pulling, tightly coiling, driving over the cable, or relying on an unapproved extension. Connector holsters should keep contacts protected and cables out of paths. Exact outdoor/environmental ratings, mounting, fittings, sunlight, heat, flood, salt/coastal and impact conditions still apply.

For tandem parking, decide whether the front or rear vehicle can leave without unplugging or moving the other. For detached parking, compare trench/feeder/communications options and property approvals. For shared, rental or association property, establish who owns the wall, parking spaces, electrical equipment, utility account, network, EVSE and ongoing service.

The HOA coordination page can help organize association documentation where that scope applies, but the signed project documents must identify property rights, accessibility, shared-cost and approval responsibilities.

Decide whether capacity work belongs in the project

Two EVs do not automatically require a new panel or service. First complete the applicable load calculation, inspect the physical electrical system, define both EV charging duties, and compare feasible control/output paths.

Separate terms:

• a panel replacement changes equipment but may not increase utility service capacity;
• a subpanel adds distribution positions but depends on its feeder and upstream capacity;
• feeder work changes a defined downstream path;
• service/customer-side work can affect conductors, disconnects, meter equipment and panels;
• utility-side work may involve the provider’s meter, conductors, transformer or other infrastructure; and
• a PCS/load-control design can limit demand but does not repair damaged or unsuitable equipment.

Compare each feasible alternative using the same two-vehicle energy/window and future-load inputs. Include heat pumps, electric water heating, cooking, pool, workshop, battery charging or other credible changes rather than allocating the same remaining capacity twice.

The home electrical-capacity roadmap owns coordination with solar, battery and other future loads. This page needs its current capacity conclusion and uses it to choose the two-EV architecture.

Do not let a contractor call service work future-proof. The proposal should identify the load calculation, physical condition, limiting boundary, actual capacity added or reserved, utility decision still pending, and which future scenario the work supports.

Check utility, permit, and property paths without assuming an outcome

First identify the serving electric provider from a current bill and address. Rate structures, optional EV programs, demand-response offerings, equipment lists, enrollment, data access and control terms can change. Verify current official documents before treating a schedule or connected feature as valuable.

Do not promise savings from shifting both vehicles. The outcome depends on actual charging energy, rate design, time windows, demand or minimum charges where applicable, other household use, program control, equipment eligibility and owner behavior. The design should work safely even when a commercial program changes or the owner leaves it, unless the approved electrical architecture explicitly establishes otherwise.

South Carolina’s Building Codes Council publishes the state adoption and modification record. Identify the filing-date electrical requirements and actual AHJ. Do not assume the newest national code language online applies to a current local permit, and do not assume a previously permitted single-EV circuit approves a second EVSE or grouped design.

The proposal should state:

• AHJ and permit/inspection path;
• exact code edition/modifications used by the design;
• serving utility and any utility-controlled work/program dependency;
• property/HOA/landlord/condominium approvals;
• who files, pays and responds to corrections;
• whether equipment may be ordered before open decisions;
• what happens if the proposed topology or product is rejected; and
• inspection, configuration and acceptance records.

Keep equipment purchased, permit submitted, approved, installed, inspected, utility/program enrolled, and accepted separate.

Normalize two-EV proposals before comparing them

Give every bidder the same two-vehicle record, parking drawing, electrical information, future-load list and required scenarios. Then request this matrix:

Proposal field	Required answer
Vehicles/connectors	Exact current vehicles, inlet/connector evidence, adapter policy and future assumptions
Energy/windows	Normal and stress deficits, arrivals, departures, overlap and priority
Architecture	One shared, dual-connector, independent, group sharing, service PCS, sequential or staged
EVSE	Exact manufacturer/model/version/connector, quantity, listing and manuals
Circuits/topology	Branches, feeders, panel/service boundaries, protection and configured outputs
Controls	Group/aggregate ceiling, measurement point, allocation, communications and fault behavior
Parking/routes	Mounting, cables, impact, weather, conduit/trench, restoration and space ownership
Approvals	AHJ, utility/program, HOA/property and responsible parties
Acceptance	Both-vehicle test cases, settings, as-builts, accounts and handoff
Lifecycle	Firmware/network, warranty, service, replacement and adding a future EVSE

Classify each material item as included, allowance, excluded, owner-provided or unresolved. Cover EVSE hardware, breakers/protection, conductors/conduit, panel/feeder/service work, meter/controllers, trenching, wall repair, networking, permits, utility work, HOA documents, commissioning and closeout.

If one quote uses independent circuits and another uses an aggregate control, their hardware totals are not directly comparable. Compare which energy/window scenarios each meets, which dependencies can stop both vehicles, what electrical ceiling is enforced, how settings are protected, and what happens on failure.

Sunburst’s EV charger service page provides service context. When both vehicles, parking positions, charging history and panel/service information are ready, request a two-EV charging assessment. The signed proposal—not this article—must confirm supported EVSE, sharing/control products, electrical scope, approvals and commissioning duties.

Commission with both EVs, not an empty charger

Commissioning one EVSE with no vehicle or testing one vehicle at a time cannot prove the two-EV operating promise. Use the actual vehicles when available or an approved equivalent test method documented by the responsible installer.

The acceptance plan should include:

1. exact EVSE, connectors, circuits, controllers, meters and firmware recorded;
2. configured output and aggregate ceiling matched to approved drawings;
3. both vehicles parked normally and cable paths checked;
4. each vehicle connect, start, stop, reconnect and access behavior;
5. both vehicles requesting charge simultaneously;
6. allocation or priority observed and recorded;
7. one vehicle completing, pausing, unplugging and reconnecting;
8. household load change while service-level control operates;
9. safe approved test of lost leader, sensor, local communication or network where applicable;
10. power-cycle/restart and persistence of settings;
11. vehicle/EVSE schedule conflict and owner override behavior;
12. labels, permits/inspection status, accounts, training and as-built handoff.

Do not claim every failure can be field-tested safely. Some behaviors should be verified from certification, manual and manufacturer documentation. The commissioning plan should distinguish observed tests from documentary evidence.

Record actual charging power at both vehicles/EVSEs under the test conditions without turning it into a universal charge-time promise. Note starting state, temperature, vehicle limit, other household load, control state and test duration.

The owner package should include approved/as-built one-line and routes, models/serials, manual revisions, circuit and group settings, meter/controller details, firmware, account ownership, permits/inspection, commissioning results, schedules/priorities, troubleshooting, warranty registration and service contacts.

Choose, stage, or defer the project

Choose one shared EVSE

Choose when one connector safely reaches both vehicles, both energy/departure needs fit a realistic sequential workflow, connector movement or alternating nights is acceptable, and exceptions have a fallback. Reject it when the household must rely on an overnight cable swap it will not perform.

Choose two independent EVSE circuits

Choose when each parking position needs reliable independent access and the qualified electrical design supports both simultaneous continuous loads or exact configured limits. Do not choose merely because the panel has spaces.

Choose product-supported sharing or listed aggregate management

Choose when exact models, topology, certification, ceiling, allocation, communications, fault behavior and commissioning match the property and energy windows. Do not use generic smart features as safety evidence.

Choose lower output or sequential priority

Choose when scenario analysis shows both departures can be met, settings are durable, and priority/failure behavior is acceptable. A smaller designed output is not an inferior result when it serves the real duty.

Stage or defer

Stage one EVSE and preserve an evidence-based pathway when the second vehicle, connector, parking position or timing is uncertain. Defer when electrical condition/capacity, property approval, control compatibility or routes remain unresolved. Buying two devices does not create a complete design.

Questions to ask every installer

1. What energy deficit and charging window did you use for each vehicle?
2. What happens on the normal-overlap and two-vehicle stress night?
3. Why does the design use one connector, two independent circuits, group sharing or aggregate control?
4. Which exact connectors fit both vehicles, and what adapter assumptions exist?
5. Can both cables reach in normal and reversed parking without crossing hazards?
6. What are the exact EVSE models, versions, firmware, listing and manuals?
7. If units share power, what is the approved branch topology and group ceiling?
8. How is power allocated when both vehicles request charge?
9. What is measured at the service/feeder, which loads are controlled and what limit is protected?
10. What happens if a leader, sensor, meter, network or communication fails?
11. Can owners change a setting that the electrical design depends on?
12. What load calculation and equipment-condition review support the plan?
13. What panel, feeder, service or utility work is included and why?
14. Which utility, permit, HOA or property decisions remain open?
15. Will commissioning test both vehicles simultaneously and deliver the settings/results?

How Sunburst designs a two-vehicle install

We start from both charging duties and the actual overlap window, not from a catalog. That usually determines whether one shared EVSE is realistic, whether two independent circuits are justified, or whether product-supported group power sharing does the job on the capacity you already have. Configured lower output is treated as a complete design when it meets the household’s schedule, and commissioning is done with both vehicles present rather than with an empty charger.

Parking geometry matters more than people expect: cable reach, connector position on each car, and where the vehicles actually sit decide equipment placement in a way that is easy to get wrong on paper. We fix that during the site visit.

Sunburst installs EV charging statewide from Daniel Island, and coordinates with any solar or battery plans on the same service. Read next: load management versus a panel upgrade, whole-home capacity planning and detached-garage charging. See EV charger installation by city, including Summerville and Hanahan, or book a free assessment.

Frequently asked questions

Do I need two Level 2 chargers for two EVs?

Not necessarily. One connector can serve two vehicles sequentially when cable reach, connector fit, parking workflow, energy deficits and departure windows work. Two EVSEs may improve convenience or support overlapping needs, but their combined electrical load and exact control design still require review.

Can two EV chargers share one circuit?

Only when the exact EVSE system, listing/instructions, circuit topology, aggregate control, adopted requirements and AHJ support that arrangement. Do not place arbitrary EVSEs on one circuit or assume app-based scheduling makes it acceptable.

Can two chargers share power on separate circuits?

Potentially, through an exact product-supported group or a listed aggregate control designed for the relevant circuits/service/feeder. Confirm models, measurement point, ceiling, communications, allocation, failure behavior and commissioning. Separate circuits alone do not create power sharing.

Will two EVs require a 200-amp service or a service upgrade?

There is no fixed service-size answer. A qualified review must use both configured EV loads, other household loads, service/panel/feeder condition and topology, available windows, lower-output and managed alternatives, future loads and utility conditions. Two vehicles do not automatically require an upgrade.

How long will it take to charge both cars?

There is no responsible universal time. It depends on each energy deficit, vehicle AC acceptance, configured output, aggregate allocation, parking window, temperature/conditioning, losses, schedules, household load management and interruptions. Model property-specific scenarios and test operation; do not accept a guaranteed completion time.

Can I use one J1772 or J3400/NACS charger for both vehicles?

Only after verifying each exact vehicle, connector, EVSE and any manufacturer-approved adapter under current documentation. Connector fit does not prove charging function, access control, power-sharing compatibility, warranty or safe cable reach.

Is scheduling two chargers enough to prevent overload?

Not automatically. Owner/vehicle/app schedules can overlap, change, drift or fail. If capacity depends on limiting aggregate EV load, use the exact listed/approved control and test its fault behavior. Scheduling can remain a convenience layer.

Can solar charge both EVs directly?

Ordinary grid-connected home solar and EV charging interact through the home’s electrical system; a connector does not prove direct or outage charging. The separate solar plus EV charging guide owns annual energy, power flow, controls and utility questions. Do not infer savings or solar-only charging from two EVSEs.

Sources and methodology

This guide was researched and checked on August 10, 2026. It uses a two-vehicle duty method: document each vehicle’s energy and deadline, draw parking/overlap windows, compare exact electrical/control architectures, normalize proposal dependencies, and commission both vehicles under simultaneous demand.

Primary references include:

• EPA Getting Started with Home EV Charging
• EPA Home EV Charger Calculator
• DOE Alternative Fuels Data Center home charging
• UL Solutions power-control systems
• UL Solutions PCS technical guidance
• ENERGY STAR EVSE product criteria
• South Carolina Building Codes Council adoption record
• Manufacturer example of distinct group/dynamic/static power management

The manufacturer example establishes that configuration and compatibility are product specific; it is not a recommendation or a statement of Sunburst support. Re-check current vehicle and EVSE manuals, certification/listing, adopted code, AHJ, utility program, property documents and signed project scope before relying on the framework.