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| -rw-r--r-- | content/articles/ev-crash-course.md | 36 |
1 files changed, 10 insertions, 26 deletions
diff --git a/content/articles/ev-crash-course.md b/content/articles/ev-crash-course.md index 35e109d..041c06c 100644 --- a/content/articles/ev-crash-course.md +++ b/content/articles/ev-crash-course.md @@ -7,10 +7,7 @@ toc: true --- ## Reading EV Specs -|Vehicle Type|Efficiency Unit|Capacity Measure|Capacity Unit| -|------------|---------------|----------------|-------------| -|Internal Combustion Engine (ICE)|Miles per Gallon (MPG)|Gas Tank Size|Gallons| -|Battery Electric Vehicle (BEV)|Watt-hours per Mile (Wh/mi)|Battery Capacity|kilowatt-hours (kWh)| +{{< table "ev_crash_course" "types" >}} **Note:** Unlike MPG, a lower Wh/mi is *more efficient* than a higher Wh/mi, because the numerator (Wh) and denominator (mi) are reversed. In @@ -27,12 +24,7 @@ Here are the efficiency, capacity, and range ratings from [fueleconomy.gov][epa] for the vehicles used in the examples below: **EPA Efficiency and Range Ratings** -|Model|Efficiency|Capacity|Range (miles)| -|-----|----------|--------|------------:| -|[2019 Tesla Model 3 LR AWD][epa-model3]|290 Wh/mi|75 kWh|310 mi| -|[2017 Hyundai Ioniq Hybrid][epa-ioniq]|55 MPG|11.9 gallons|**650 mi**| -|[2021 Ford Mustang Mach-E Standard RWD][epa-mach-e]|295 Wh/mi|64 kWh|230 mi| -|[2020 Hyundai Kona EV][epa-kona]|280 Wh/mi|64 kWh|258 mi| +{{< table "ev_crash_course" "epa_ranges" >}} ## Chargers EV chargers ([Electric Vehicle Supply Equipment, or EVSE][evse]) are @@ -40,22 +32,14 @@ grouped into three categories by power output, measured in kilowatts (kW): **Charger Types** -|Type|Charging Speed (mi/hr)|Power (kW)|Efficiency (%)|Time (50 Miles)|Time (90% SoC)|Time (100% SoC)| -|----|---------------------:|---------:|-------------:|-------:|--:|---:| -|Level 1 (L1)|5 mi/hr|1.2 kW|85%|10 hours|57 hours|63 hours| -|Level 2 (L2)|25 mi/hr|7.2 kW|95%|2 hours|10 hours|11 hours| -|Level 3 (L3)|500 mi/hr|150 kW|99%|6 minutes|45 minutes|1 hour| - -Columns: - -|Column Name|Column Description| -|-----------|------------------| -|Type|Name and abbreviation.| -|Charging Speed (mi/hr)|Miles of range per hour gained by a [2019 Tesla Model 3 LR AWD][epa-model3] for this type of charger. I like to use miles per hour instead of kW because it's easier for people to visualize than kW.| -|Efficiency|Energy efficiency for this type of charger, expressed as a percentage and calculated as the difference between the energy from the wall minus the energy that reaches the battery, divided by the energy from the wall (`(Ew - Eb)/Ew`).| -|Time (50 Miles)|Time to gain 50 miles of range in my car using this type of charger. I included this column because [most Americans drive less than 40 miles per day](https://www.bts.gov/archive/publications/passenger_travel_2015/chapter2a).| -|Time (90% SoC)|Time to charge my car from 0% to 90% using this type of charger. I included this column because you don't charge EVs to 100% except on long trips.| -|Time (100% SoC)|Time to charge my car from from 0% to 100% using this type of charger.| +{{< table "ev_crash_course" "charger_types" >}} + +Notes: + +* **Charging Speed (mi/hr):** I like to use miles per hour instead of kW because it's easier for people to visualize than kW. +* **Efficiency:** Energy from the wall minus the energy that reaches the battery, divided by the energy from the wall (`(Ew - Eb)/Ew`). +* **Time (50 Miles):** I included this column because [most Americans drive less than 40 miles per day](https://www.bts.gov/archive/publications/passenger_travel_2015/chapter2a). +* **Time (90% SoC):** I included this column because you don't charge EVs to 100% except on long trips. The [Alternative Fuels Data Center][afdc] has a [great summary of EV chargers](https://afdc.energy.gov/fuels/electricity_infrastructure.html#level2). |