“Level 1, Level 2, DC fast” gets treated as a technical footnote when it's really a business decision - the power level installed at a site sets a hard ceiling on how many sessions a connector can physically serve in a day, which flows straight into the revenue math behind it. Choosing the wrong mix doesn't just under-deliver on charging speed, it under-delivers on the site's return.
The three power levels, in practical terms
| Level | Typical power | Range added per hour* | Best-fit dwell time |
|---|---|---|---|
| Level 1 (AC) | ~1.4 kW (standard household outlet) | ~3-5 miles | Overnight, 8+ hours |
| Level 2 (AC) | ~7-19 kW | ~20-40 miles | 1-8 hours |
| DC fast charging | ~50-350 kW | ~60-250+ miles | 15-45 minutes |
*Illustrative ranges - actual charging speed depends on the vehicle's onboard charger or DC intake limit, battery state, and ambient temperature, not the connector rating alone. See How Many EV Charging Standards Are There? for how connector family (Type 1, Type 2, CCS, NACS, GB/T, CHAdeMO) relates to AC/DC capability.
Why this is a revenue decision, not just a technical one
A connector's power level sets the theoretical ceiling on sessions per day, and sessions per day is the single biggest lever on connector revenue. A Level 2 connector serving 1-hour sessions can physically support far more turnover in a business day than the same connector serving 6-hour overnight sessions - but only if the site's actual driver behavior matches that assumption. Installing DC fast charging at a site where drivers stay for hours anyway wastes the premium paid for that hardware; installing Level 2 at a highway corridor site where drivers need to leave in 20 minutes caps revenue no pricing strategy can fix.
Matching power level to site type
- Workplace and multifamily residential - long, predictable dwell times (hours to overnight). Level 2 is almost always the right primary investment; DC fast charging is rarely justified by the dwell time available.
- Retail and quick-service - dwell time is set by the errand, not the charger. Level 2 works where dwell naturally runs 30-90 minutes; DC fast charging fits sites with faster turnover expectations.
- Fleet depots - dwell time is operationally controlled (shift changes, overnight yard time), which usually favors Level 2 at scale over a smaller number of DC fast connectors, unless the fleet's duty cycle genuinely requires fast turnaround between routes.
- Highway corridors and travel plazas - dwell time is the constraint drivers are trying to minimize. DC fast charging is the only power level that matches the use case; Level 2 here mostly measures failure to plan for demand.
The hardware cost side of the decision
Power level also drives capital cost in the opposite direction from the speed benefit: DC fast hardware costs substantially more per connector than Level 2, and often requires utility service upgrades and demand charges that Level 2 sites avoid entirely. A site with a small number of well-utilized Level 2 connectors can outperform a site with expensive DC fast hardware sitting idle most of the day - utilization, not raw power, is still what determines whether the investment pays back. See the site-host revenue model for how utilization and hosting economics interact for the property owner's side of that decision.
Blending power levels on one site
Most well-planned sites don't pick one level exclusively - they blend a small number of DC fast connectors for drivers who need speed with a larger number of Level 2 connectors for drivers with longer dwell time, matching hardware spend to how the parking is actually used rather than defaulting to the fastest available option everywhere. A platform that reports session length and utilization per connector, not just per site, is what makes that blend decision data-driven after the first few months of operation instead of a one-time guess made before a single session has run. See how CarChargeOS surfaces that data on the platform page.
Frequently asked questions
Is DC fast charging always better than Level 2?
No - it's better for the specific case where drivers need to leave quickly. At sites with long dwell time, DC fast hardware's speed advantage goes largely unused while its higher cost and demand charges remain, which usually makes it the worse investment.
Does connector power level affect which connector type I need?
Partly - some connector families are AC-only, DC-only, or support both depending on the specific plug (see the connector family breakdown), so power level and connector standard need to be decided together, not independently.
Can I upgrade a Level 2 site to DC fast charging later?
Usually not as a simple hardware swap - DC fast charging typically requires a larger electrical service and different site infrastructure, so it's worth sizing electrical capacity for likely future demand even if the initial installation is Level 2 only.