Electric Vehicles
Level 1 vs Level 2 Charging Time Calculator
Compare charging duration at entered Level 1 and Level 2 power. Actual power is limited by the vehicle onboard charger and electrical supply.
Create a documented input set
Use a separate saved result when one uncertain measurement needs a cautious alternative.
Purpose and reference point
Compare charging duration at entered Level 1 and Level 2 power — temperature, control limits, and conversion losses can separate a calculated value from a dashboard estimate.
Actual power is limited by the vehicle onboard charger and electrical supply — that condition defines when time saved with level 2 is comparable with another result.
Control software, temperature, wiring loss, battery condition, and equipment limits can alter the measured electrical result — for battery energy needed, the page specifically expects energy that must reach the battery.
Keep this result separate from the task to estimate a public-charging idle fee after an entered grace period, which is available in the Public Charging Idle Fee.
Vehicle data needed here
Battery energy needed: Energy that must reach the battery — a compatible entry should identify whether the reading is taken at the source, charger, battery, or accessory.
The Level 1 wall power entry represents available Level 1 charging power — before calculating, identify whether the reading is taken at the source, charger, battery, or accessory.
Level 2 wall power is defined here as available Level 2 charging power — keeping that definition intact requires you to identify whether the reading is taken at the source, charger, battery, or accessory.
For Charging efficiency, use the quantity described as wall-to-battery efficiency used for both cases — in the vehicle record, keep the percentage basis explicit and do not mix a decimal fraction with a percent value.
When you need to estimate how a continuous HVAC load changes EV range at an average speed, avoid adding an improvised field here and open the EV Climate-Control Range Impact.
The EVSE Current Limit complements this result by calculating how to find the lowest current limit among the vehicle, charging equipment, and circuit.
How the result is derived
In “charging time = battery energy needed ÷ (power × efficiency),” the relationship answers the question stated above without adding an unstated correction factor.
No term beyond battery energy needed, level 1 wall power, level 2 wall power, and charging efficiency is introduced in “charging time = battery energy needed ÷ (power × efficiency).”
What a changed result indicates
Time saved with Level 2 answers “Compare charging duration at entered Level 1 and Level 2 power.” The additional display, Level 1 charging time, is a different view of the same entered measurements.
Installation suitability must be evaluated by a qualified professional — when that condition changes, compare separate calculator runs instead of blending the inputs.
Because actual power is limited by the vehicle onboard charger and electrical supply, a disagreement between time saved with level 2 and an outside reference should trigger a review of battery energy needed and charging efficiency.
Input and comparison questions
What measurement source fits Battery energy needed when it represents energy that must reach the battery?
Because battery energy needed represents energy that must reach the battery, use a source tied to the exact vehicle, component, and operating period described by the other fields.
How does the warning “Actual power is limited by the vehicle onboard charger and electrical supply” affect Time saved with Level 2?
The condition “Actual power is limited by the vehicle onboard charger and electrical supply” is not corrected automatically by the numeric inputs, so create a separate level 1 vs level 2 charging time case when it changes.
What assumption is expressed by “charging time = battery energy needed ÷ (power × efficiency)”?
In “charging time = battery energy needed ÷ (power × efficiency),” battery energy needed and level 1 wall power are treated as parts of one vehicle case.