EV Charging

Convalt Energy is currently working on setting up EV charging stations in Los Angeles, San Francisco and New York markets, expecting to go live prior to June 2022. Currently our plan is to setup Level 2 and Level 3 charging stations.

A nationwide expansion strategy is currently under development at Convalt. We expect to announce this strategy over the next few months.

A main hindrance to this growth is a lack of clear information on the economic, environmental, and utility infrastructure impacts of daytime EV charging with solar. However, Convalt has designed a plan that would look to install the optimal solution for EV car owners and the utility supplying the electricity.

Level 1 Charging

2 to 5 miles of range per
1 hour of charging

J1772 charge port

Level 1 charging stations use a normal 120-volt connection with a standard household outlet with no extra costs of installation. The downside is slow charging speed. Many EV charging took place at owners’ houses. Level 1 provides 1.4 kW of power in the U.S., is simply a conventional wall socket, and requires no additional circuitry, aside from the adapters required to connect the EV to the socket.

Level 2 Charging

10 to 20 miles of range per
1 hour of charging

J1772 charge port

Level 2 EV chargers use a higher-output 240-volt power source (e.g., oven or clothes dryer). Charging times are much faster than with a Level 1 EV charging station. More modern houses typically have these outlets. Level 2 charging normally occurs in workplaces, business locations (hotels, gas stations, private parking lots), and public locations (on-street parking space, garages, streets, public parking lots— wherever cars are likely to be stationary for hours at a time).
Level 2 charging starts at a power rating of 6.6 kW, increasing to 19.2 kW depending on the level of current that the supporting circuitry can sustain. Most home Level 2 charging, and almost all commercial Level 2 charging, is limited to 6.6 kW because (a) the onboard inverter on most existing EVs cannot handle significantly more than this level and (b) boosting the current typically requires the installation of more expensive higher-capacity circuitry.

DC Fast Charging

60 to 80 miles of range per
20 minutes of charging

CSS charge port
CHAdeMO charge port
Tesla charge port

Level 3 DC fast-charging devices use very high voltage and can add 90 miles of range to an EV in just 30 minutes. These chargers are extremely expensive and routinely using a Level 3 charger can ultimately hurt EV’s battery; however, a Tesla survey found it’s not the case in Tesla’s EVs. Level 3 DC fast charging is not really for individual use; instead, build for public use (e.g., commercial locations).

Level 2 charging starts at a power rating of 6.6 kW, increasing to 19.2 kW depending on the level of current that the supporting circuitry can sustain. Most home Level 2 charging, and almost all commercial Level 2 charging, is limited to 6.6 kW because (a) the onboard inverter on most existing EVs cannot handle significantly more than this level and (b) boosting the current typically requires the installation of more expensive higher-capacity circuitry.

Level 2 Charging

AC power is supplied from the charging station to the on-board charger, which supplies DC power to the battery

DC Fast Charging

The charger is off board the vehicle and supplies DC power directly to the battery.