DC meter for electrical vehicle charging station

1 . A direct current (DC) meter for an electrical vehicle station, the DC meter comprising:

a first current input;

a second current input;

a voltage input;

at least one analog-to-digital converter coupled to the first current input, the second current input and the voltage input, and configured to convert analog signals from the current inputs and the voltage input into digitized data;

at least one processing module comprising a digital signal processor (DSP), a field-programmable gate array (FPGA), and a central processing unit (CPU), the processing module being coupled to the at least one analog-to-digital converter and configured to:

generate a first current parameter corresponding to the digitized data of the first current input;

generate a second current parameter corresponding to the digitized data of the second current input;

generate a voltage parameter corresponding to the digitized data of the voltage input;

compute a first energy consumption according to the first current parameter and the voltage parameter;

compute a second energy consumption according to the second current parameter and the voltage parameter; and

output timestamped energy consumption data for each of two separate electric vehicle connectors using the common voltage input

wherein the field programmable gate array (FPGA) configured to transfer digitized data between the at least one analog-to-digital converter and the processing module;

wherein the DSP is configured to perform digital filtering of the digitized signals prior to energy computation.

2 . The DC meter of claim 1 , wherein the at least one processing module is further configured to:

determine a total energy consumption by summing the first energy consumption and the second energy consumption; and store the total energy consumption in non-volatile memory for billing purposes.

3 . The DC meter of claim 1 , further comprising a power supply configured to provide isolated power to the at least one analog-to-digital converter and the processing module.

4 . The DC meter of claim 1 , wherein the DC meter further comprises non-volatile memory configured to store timestamped energy consumption data, waveform captures, and event logs associated with power quality events.

5 . The DC meter of claim 1 , wherein the processing module is configured to record historical energy consumption trends and transfer the data to a remote server.

6 . The DC meter of claim 1 , further comprising a communication interface selected from the group consisting of Ethernet, RS485, USB, and wireless transceivers, the communication interface being configured to transmit billing data to a remote computing device.

7 . The DC meter of claim 6 , wherein the communication interface is configured to transmit a notification in response to detection of a power quality event.

8 . The DC meter of claim 1 , wherein the DC meter is configured to simultaneously measure and report energy consumption for two electric vehicle connectors using a common voltage input.

9 . The DC meter of claim 8 , wherein the processing module is configured to generate separate billing records for each of the two electric vehicle connectors.

10 . The DC meter of claim 1 , wherein the processing module is further configured to compute harmonics, phasor components, or power quality indices based on the digitized signals.

11 . The DC meter of claim 1 , wherein the DC meter is configured to capture waveform data during a voltage surge, voltage sag, or current short circuit and transfer the waveform data to a remote computing device.