What is public charging and how does it work?
Public charging within the CPS Energy service area is currently with Level 2 charging stations, each having 1 or more ports, that allow electric vehicle (EV) owners to charge the battery of an EV.  When the charging port's cord is plugged into an EV, a Level 2 charger can vehicleadd about 20 miles of range per hour of charging.

How many local public charging ports exist?
There are 43 public charging ports at CPS Energy's charging stations located throughout San Antonio. A charging station has one or more ports to plug in EVs. The City of San Antonio and a few private entities have also installed a number of charging sites.  Electrify America, powered by CPS Energy, operates DC fast chargers at the Walmart Supercenter located at 4331 Thousand Oaks. 

Where are the charging stations and how can an EV owner locate one?
We partnered with businesses and educators to install charging stations at various locations across the city. Those businesses include HEB, Wonderland of the Americas Mall, University Health System, UTSA,  Port San Antonio and  VIA  Metropolitan Transit. A map with each charging station location and real time availability of charging ports can be found at ChargePoint.

Can EV owners fully charge their vehicles at home?
Yes! We anticipate EV owners will primarily charge their vehicles at home and public charging will be used for a quick charge between trips or to “top off” a battery.

How much does it cost to use public charging locally?
The public charging ports operated and maintained by us have a ($2 on-peak price M-F 4-9 pm and $1.50 off-peak price all other hours of the week, with a $3 minimum fee.) Therefore, there will be a $3 fee (included no matter the minimum amount of time charged is less than 1.5 hours) for users not in the Public Charging Program. Our flat rate program provides unlimited charging at a cost of only $96 for one year. 

How can an EV owner pay for the use of a charging station's port?
EV owners can use a port by accessing it with a personal credit/debit card. Just call the 1-800 number on the charging station to provide the card information. ChargePoint, the charging station manufacturer, also provides a Radio Frequency Identification (RFID) card that can be purchased directly from ChargePoint and used at any ChargePoint site anywhere in the country. A ChargePoint App is also downloadable from the App Store and can be used at any ChargePoint Station.

Who owns the public charging stations?
We own, operate, and maintain about 10% of public charging stations within San Antonio. Our charging stations are identifiable on the ChargePoint map as CPSE-SATX stations. However, the majority of all public EV charging stations are not CPS Energy-owned or operated.

How do Cold Temperatures affect my EV range?
Cold weather affects the electric vehicle’s efficiency and results in reduced driving range and longer charging times. This is due to the slow down of chemical and physical reactions in the batteries, and additional energy being needed for battery temperature management. The car heater also drains the battery and affects the driving range.

How do Hot Temperatures affect my EV range?
Extreme heat can affect how far an electric vehicle travels on a charge. EV range begins to drop at a temperature of about 85 degrees Fahrenheit. High air conditioning use also drains batteries and affects electric vehicles’ driving range and performance.

How do I prepare for hot and cold weather when vehicles are charging and not in use?
Park your electric vehicle in a garage (if available) when extreme temperatures occur. On hot days, it may be best to park in shady locations and consult the manufacturer's service department for information about best practices. Please keep in mind that gas vehicle efficiency is also significantly impacted by driving behavior and extreme weather conditions.

EV - any vehicle that uses electric motors, either in full or in part, as propulsion

ICE - Internal Combustion Engine, an engine powered through the burning of fossil fuels

BEV - battery electric vehicle, a vehicle that solely relies 100% on battery power or pure EV

PHEV - plug-in hybrid electric vehicle, a vehicle that has a connection to plug into an electrical socket or charging station but also has a gas tank; typically, this vehicle will run on battery power until it’s depleted and then switch over to gas

EREV - extended range electric vehicle with the electric motor driving wheels; features an auxiliary power unit, usually an internal combustion engine, which acts as a generator to recharge the battery when it runs out

Hybrid - a car that integrates a small battery and an electric motor to enhance the efficiency of the engine. The battery’s charge is maintained by the internal combustion engine (ICE) and cannot be charged by plugging into an electrical supply. Hybrids can offer greater fuel economy than a traditional ICE but can only travel very short distances on electric power only

EVSE - Electric Vehicle Supply Equipment is the technical name for the box, cord and plug that controls the safe current flow to fuel an electric vehicle

Charge - “fueling” a vehicle with electricity, not gasoline. Just like your cell phone, the vehicle will work on a partial or full charge. Charge time varies depending on the size of the battery and the amount of electric current being supplied, i.e. Level 1, 2 or 3 (Fast Charging)

Fast charge - charging at a higher current that will fully charge an average electric car in three to four hours.  Also known as Level 3

Charging point - location where electric vehicles can plug in and get charged, whether at home, at work, or in publicly accessible locations.  Also referred to as a charging station, which may be equipped with one or multiple ports to accommodate one or multiple EVs charging simultaneously

State of charge (SOC) - usually found on the dashboard display and shows the remaining battery level in percentages

Range - distance you can travel on pure electric power before the battery requires a recharge

Range anxiety - concern or fear of running out of charge while driving a plug-in EV

Range per hour (RPH) - miles of range per hour of charge

Kilowatt hour (kWh) - unit of energy equivalent to the energy transferred in one hour by one kilowatt of power. Electric car batteries are measured in kilowatt hours

Regenerative braking - a method of braking in which energy is extracted from the parts braked, to be stored and reused

Level 1 charging - involves powering the EVSE via a typical wall socket. In the U.S. this is typically a 120 V AC outlet. In European countries where there may be higher current at the wall, charge speeds can be quicker

Level 2 charging - charging from a 240 V AC outlet, and typically with higher amperage too. Amperage current makes a difference in charge rates – thus not all “level 2” charging is equal

Level 3 charging - also known as DC fast charging or DC quick charging and not available for homeowners. This is high amperage, high voltage – typically 480 volts – that can charge a battery pack 80 percent full in about 30 minutes more or less