Level 1 vs low-power Level 2 apartments: how to compare charging in 2027

Level 1 vs low-power Level 2 apartments is a useful comparison when conventional Level 2 would serve fewer stalls or require capacity work. Both options need designed circuits and operations.

What to take away

Nightly energy: what each option delivers

Use the same daily energy and parking windows for both cases. Do not compare idealized range figures because the vehicle, charging equipment, starting state of charge, and actual service arrangement change the result.

Level 1 runs at 120 V and typically draws 12 A, about 1.4 kW. Ten hours plugged in returns roughly 14 kWh, about 40 to 50 miles in an efficient car. A large pickup gains closer to 25 to 30 miles.

Low-power Level 2 runs at 208 to 240 V. Settings of 12, 16, 20 and 24 A give about 2.9, 3.8, 4.8 and 5.8 kW at 240 V. A 10-hour window returns roughly 29, 38, 48 or 58 kWh, or about 90 to 190 miles.

Test a routine night, shortened dwell period, missed connection, and unusually long trip. Report delivered kilowatt-hours and unmet need instead of promising range.

Electrical scope: circuits, panels and routes

Level 1 uses 120 V, while Level 2 uses 240 V in typical residential settings. The Department of Energy's electric-vehicle reference chapter distinguishes Level 1 equipment from Level 2 equipment. It explains that the vehicle converts supplied AC power to DC power for recharging its battery.

SAE J1772 defines the connector classes for both levels. NFPA 70, the National Electrical Code, Article 625 sets the circuit requirements for charging equipment.

Inventory available service, panels, circuits, routes, and receptacles; check future loads before deciding how many stalls each option can support.

Lower power does not make an existing outlet automatically suitable. A qualified professional must assess the actual arrangement.

Typical installed cost per stall in North America runs about $400 to $1,500 for a new 120 V circuit near a panel, and about $2,000 to $6,000 for a hardwired 240 V networked unit.

The Occupational Safety and Health Administration's electrical topic page describes electrical hazards and related safety resources.

Equipment, access and operating cost

List property-owned and resident-owned cordsets, outlet monitoring, access control, billing, theft prevention, cable storage, network fees, inspections, repairs, and replacement. Low-power Level 2 may improve energy recovery while introducing another receptacle or hardwired equipment arrangement.

Check vehicle and connector compatibility for the chosen configuration. Document who approves adapters and replacements.

A portable Level 1 cordset costs about $200 to $400, and a hardwired low-power Level 2 unit about $500 to $1,500. Network fees run $5 to $15 per port per month.

At a typical commercial rate of 12 to 25 cents per kWh, a 14 kWh Level 1 night costs about $1.70 to $3.50, and a 40 kWh Level 2 night about $5 to $10.

The Department of Energy's EVSE infrastructure training frames charging equipment within a larger facility infrastructure system. It supports comparing the physical and operational boundaries of two options. It does not determine the correct equipment for an apartment property.

Scale, exceptions and the decision rule

Model the number of usable spaces, not only circuits. Account for route cost, assigned parking, accessibility, shared use, outages, and vehicles that need faster service.

Select a mixed design when evidence supports it. Long-dwell residents may remain on Level 1 while higher-energy or irregular users receive low-power Level 2. Preserve the assumptions and set a trigger to revisit the mix after measured use, resident turnover, or building-load change.

Divide required nightly energy by parked hours. A resident who needs 20 kWh and parks for 12 hours needs 1.7 kW, and Level 1 at 1.4 kW falls short by about 3 kWh. A 16 A low-power Level 2 covers that night in five to six hours.

Treat low-power Level 2 as worth the extra circuit when nightly need runs above 1.4 kW multiplied by the parked hours. That is about 11 kWh over an 8-hour night and 14 kWh over 10 hours.

Test the comparison in occupied stalls

Pilot both options with clearly documented electrical arrangements and representative residents. Measure connection time, delivered energy, unmet need, faults, outlet or equipment condition, help requests, billing work, and resident confidence. Include a shortened night and a missed connection rather than testing only ideal operation.

Compare results against the same acceptance rules. A faster option may add little value for a resident whose vehicle recovers routine energy, yet that increase may prevent repeated shortfalls for another schedule.

Record which differences came from charging power and from parking access, outages, vehicle settings, or user instructions, then use that evidence to assign the final mix.

Keep the pilot decision traceable

Save tested equipment, stall assignment, operating conditions, and dates together. Keep observations and final decision with them.

If the property changes a pilot after a resident moves, a vehicle changes, or a circuit is altered, treat it as a new test condition.

The goal is not an elaborate research program but to keep enough context so later expansion does not mistake an old pilot result for a universal conclusion.

The National Archives guide to basic records-management concepts explains that records are managed through defined activities across their life cycle.

Comparison record

What we recommend

Start with Level 1 where residents park overnight for 8 hours or more and nightly need stays under 1.4 kW multiplied by those hours. Add low-power Level 2 only at stalls that repeatedly fall short.

Common questions

Is low-power Level 2 always the better apartment choice?

No. It may recover more energy, but the value depends on resident need, electrical scope, parking access, and operating cost.

Can a property compare the options by advertised range alone?

No. Compare delivered energy and unmet need in the same real parking window.