JP4948371B2 - Electricity price discount system - Google Patents

Description

  The present invention relates to an electricity bill environment discount system for promoting CO2 reduction of a customer.

  Conventionally, it has a display means for measuring and displaying the voltage and current during continuous use of an electric appliance, and it is a CO2 provisional calculation that converts the amount of power consumed from the amount of CO2 generated by power refining per unit of consumption to a coefficient. A technique (Patent Document 1) is disclosed in which the means is internally provided and the CO2 provisional emission amount is numerically displayed on the display means together with the power consumption.

  In addition, a plurality of electrical equipment groups that are operated by an AC power source and a plurality of electrical equipments are connected, and the operation time, power consumption, electricity charges, and CO2 emissions of each electrical equipment of the electrical equipment group are calculated from time to time. An electric equipment control system technology having means for displaying to a user (Patent Document 2) is disclosed.

Furthermore, a technique (Patent Document 3) relating to a power consumption monitoring system that monitors the power consumption of the user, performs various tabulation processes, and displays the CO2 emission amount to the user as the processing results is disclosed.
JP 11-295358 A Japanese Patent Laid-Open No. 2002-40065 JP-A-2005-308729

Prior arts such as the above-mentioned Patent Documents 1 to 3 display the CO2 emission amount, promote the improvement of the awareness of CO2 reduction to the customer and work on the awareness of the customer, and the problem that the effectiveness of the CO2 reduction activity is poor. was there.
The present invention aims to solve such problems.

  In order to achieve the above object, the present invention provides the following solutions.

  (1) An electricity bill environment discount system comprising a server providing a service for promoting CO2 reduction to a customer and a handy terminal connectable via a network, and applying a predetermined environment discount rate An electricity bill environment discount system comprising: calculating means for calculating the amount of electricity according to the data at the time of meter reading; and determining means for determining that CO2 is reduced by the customer consciously reducing the amount of electricity used.

  According to the invention described in (1), the CO2 reduction brings a direct benefit to the customer, that is, the electricity price discount applying the environmental discount rate, to the customer, and the CO2 reduction can be promoted more effectively.

  (2) Connecting the handy terminal to the network, storing the electricity usage data of the previous month from the customer electricity usage database stored in the server in the storage unit of the handy terminal, and inputting the handy terminal An electricity usage amount calculation unit for calculating the electricity usage amount for the current month in the operation unit of the handy terminal based on the current month indication number input from the previous month and the previous month indication number stored in the storage unit; and a customer meter reading stored in the server Daily average electricity usage calculation unit for connecting to the network from the day database and storing the electricity usage day data of the same month of the previous year in the storage unit of the handy terminal and calculating the day of month average electricity usage by the computing unit of the handy terminal And CO2 emission factor data for the current month from the CO2 emission factor database stored in the server. A CO2 reduction amount calculation unit that stores the average CO2 reduction amount for the current month in the storage unit of the handy terminal and the environmental discount rate data of the current month from the environmental discount rate database stored in the server to the storage unit of the handy terminal An electricity rate environment discount system according to (1), comprising: an environment discount electricity rate calculation unit that stores and calculates an electricity rate to which an environment discount rate is applied.

  According to the invention described in (2), the electricity rate at the time of meter reading is displayed in the same way as the existing meter-reading system by downloading the CO2 emission coefficient and the environmental discount rate necessary for calculating the electricity rate in advance. It is possible to construct an electricity bill environment discount system in a state where it is possible to issue a meter reading slip.

(3) The determination means stores in the server a daily average electricity usage comparison unit that compares the average electricity usage of the same month in the previous year calculated by the daily average electricity usage calculation unit with the average electricity usage of the current month. Average temperature data for the same month last year and average temperature data for the current month are stored in the storage unit of the handy terminal from the customer's climate database, and an average temperature comparison unit for comparing the average temperature,
The electricity price environment discount system as set forth in (2).

  According to the invention described in (3), since the difference between the average electricity consumption in the same month of the previous year and the electricity consumption in the current month is taken into account, taking into account the change in average temperature, It is possible to calculate electricity charges.

  (4) The handy terminal includes a function for printing CO2 reduction discount electricity charges at the time of meter reading on a meter reading slip and a function for printing the environmental discount rate on the meter reading slip of (1) to (3) Electricity environment discount system.

  According to the invention described in (4), the CO2 reduction discount electricity rate and the environmental discount rate are printed on the meter reading slip at the time of meter reading, so that the customer can easily grasp the effect of CO2 reduction. In addition, it is possible to further raise customer awareness of the need for CO2 reduction.

  (5) The electricity rate environment discount system according to (1) to (4), wherein an additional discount rate is calculated when the target value of the CO2 reduction amount requested by the customer is achieved in the actual CO2 reduction amount.

  According to the invention described in (5), since the discount rate is determined according to the degree of achievement of the target set by the customer himself, the customer's willingness to promote CO2 emission reduction is improved.

  (6) The handy terminal is connected to the network, and the family number data of the same month of the previous year is stored in the storage unit of the handy terminal from the database of the customer's family structure stored in the server and compared with the number of family members of the current month. (1) to (5) electricity price environment discount system further comprising a family structure comparison unit.

  According to the invention described in (6), it is possible to calculate an electricity bill according to a substantial reduction in the amount of electricity used regardless of the variation in the family structure at the time of meter reading, and the number of families necessary for calculating the electricity bill By downloading in advance, it is possible to construct an electricity bill environment discount system in a state where it is possible to issue a meter reading slip on which the electricity bill at the time of meter reading is displayed, as in the existing meter reading system.

  According to the present invention, the customer's willingness to promote CO2 emission reduction is improved by discounting the electricity bill according to the CO2 emission reduction efforts.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a system configuration of an electricity bill environment discount system of the present invention in an electricity bill environment discount system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a handy terminal in the electricity rate environment discount system according to the embodiment of the present invention. 3 and 4 are flowcharts showing the contents of information processing at the handy terminal in the electricity rate environment discount system in the embodiment of the present invention. FIG. 5 shows a table data structure stored in a server in the electric power company of the electricity rate environment discount system in the embodiment of the present invention. FIG. 6 shows an example of the configuration of the meter reading slip output by the electricity bill environment discount system in the embodiment of the present invention.

  As shown in Fig. 1, the electricity bill environment discount system is installed in the power company and the handy terminal 10 that the meter reader carries at the time of meter reading at each customer's house, prints the electricity bill, and prints and distributes the electricity usage information. A server 30 having a power consumption amount, a family structure database, a CO2 emission coefficient, a target value, an environmental discount rate, a target achievement discount rate database, a climate database, and a meter reading date database; The handy terminal 10 includes a calculation unit 19, a printing unit 20, an input unit 21, a display unit 22, and a storage unit 23.

  An example of the handy terminal 10 is shown in FIG. The handy terminal 10 is connected to the network 40 from the server 30 installed in the electric power company and downloaded by the customer. Electricity consumption, CO2 emission coefficient, family structure, climate, meter reading date, target value, environmental discount rate, target achievement A storage unit 23 for storing discount rate data is provided.

  The storage unit 23 includes the electricity usage data 11 for storing the year, month, number of instructions, and electricity usage for each customer number used for calculating the electricity usage for the current month, and for each customer number used for calculating the CO2 emission. CO2 emission factor data 12 that stores the district number, year, month, and CO2 emission factor of the customer, family composition data 13 that has year, month, and family number data for each customer number and that is compared with the same month of the previous year, and district number for each customer , Climate data 14 having year, month and average temperature data and comparing with the same month of the previous year.

  In addition, the meter reading date data 15 used for calculating the daily average electricity usage with the electricity usage days storing the year, month, and usage days for each customer, and the customer storing the year, month, target CO2 reduction amount for each customer number. The target value data 16 that is the target value of the CO2 reduction amount for the current month, and the electric power according to the CO2 reduction rate applied to the actual electricity rate after considering each condition for storing the CO2 reduction amount every year, month and year. Environmental discount rate data 17 that is a discount rate for discounting a charge, and target achievement discount rate data 18 that is applied when a customer who stores the target achievement discount rate monthly achieves the CO2 reduction target value every year.

  Further, the handy terminal 10 includes an arithmetic unit 19 for calculating an electricity bill, a printing unit 20 for printing a target achievement discount rate, an electricity bill, an electricity usage amount, a CO2 reduction amount, etc. An input unit 21 for inputting a customer number, a district number and the like, and a display unit 22 are provided.

  The computing unit 19 is connected to the network 40 from the customer electricity usage database 31 stored in the server 30 and stores the electricity usage data of the previous month in the storage unit 23 of the handy terminal 10, and the input unit 21 of the handy terminal 10. An electricity usage calculation unit is provided for calculating the electricity usage for the current month by the computing unit 19 of the handy terminal 10 based on the number of instructions for the current month input and the number of previous month instructions stored in the storage unit 23.

  In addition, the customer's meter reading date database 34 stored in the server 30 is connected to the network 40 and the electricity usage day data of the same month of the previous year is stored in the storage unit 23 of the handy terminal 10. The daily average electricity usage calculation unit for calculating the average electricity usage and the CO2 emission factor data for the current month from the CO2 emission factor database 32 stored in the server 30 are stored in the storage unit of the handy terminal 10, and the average CO2 reduction for the current month A CO2 reduction amount calculation unit for calculating the amount.

  Further, an environmental discount electricity rate calculation unit that stores the environment discount rate data of the current month from the environment discount rate database 32 stored in the server 30 in the storage unit 23 of the handy terminal 10 and calculates an electricity rate to which the environment discount rate is applied. Prepare.

  From the average daily electricity usage calculated by the daily average electricity usage calculating unit in the same month of the previous year and the average daily electricity usage of the current month, and the customer climate database 33 stored in the server 30 the previous year. The average temperature data of the same month and the average temperature data of the current month are stored in the storage unit 23 of the handy terminal 10, and an average temperature comparison unit that compares the average temperatures is provided.

  The printing unit 20 informs the customer of the electricity usage amount on the meter reading slip, including the customer name, location of use, current electricity usage period, meter reading date, scheduled billing amount, fee breakdown, contract type, current month instructions, previous month instructions The number, the discounted number of the current month and the previous month, the district number, customer number, electricity bill receipt, etc. are printed.

  The display unit 22 has a liquid crystal display unit and displays the number of indications of the electric light meter for the current month from the input unit, an input value such as a customer number and a district number, and a calculated value of electricity usage.

  The server 30 is a family composition database used to determine whether or not there is a change in family composition between the same month in the previous year and the current month. 31 is provided. The server 30 also calculates the CO2 emission coefficient used for calculating the average CO2 reduction amount for the current month, the target value previously proposed by the customer, the environmental discount rate used for calculating the electricity rate using the environmental discount rate, and the target achievement discount. And a target achievement rate database 32 used for calculation of the electricity rate to which the rate is applied.

  Furthermore, a climate database 33 used for comparing the average temperature of the same month of the previous year and the average temperature of the current month, a calculation of the average electricity usage of the current month, and a meter reading date database 34 used for calculating the average electricity usage of the same month of the previous year. Prepare.

  Prior to the meter reading by the customer, the handy terminal 10 receives the number of instructions from the customer last month from the server 30 installed at the power company, the electricity usage data of the same month of the previous year, the CO2 emission factor data of the current month, the number of family members of the current month, The storage unit 23 stores the family composition data of the number of families in the same month of the previous year, the average temperature of the same month of the previous year, and the climate data of the average temperature of the current month.

  In addition, the date of electricity usage for the current month, the meter reading date data for the same month of the previous year, the environmental discount rate data for the environmental discount rate according to the CO2 reduction amount for the current month, and the target CO2 reduction target value for the current month that the customer has previously requested The data and target achievement discount rate data of the target achievement discount rate for the current month are downloaded and stored in the storage unit 23.

  FIG. 5 shows a table data structure in the server 30 installed in the electric power company. The electricity usage data includes the year, month, number of instructions, and electricity usage for each customer number. Before meter reading, the meter is connected to the network and stored in the storage unit 23 of the handy terminal 10 and stored in the current month's electricity. Used for usage calculation.

  The CO2 emission factor data includes the district, year, month, and CO2 emission factor stored for each customer number. Before the meter reading, the meter is connected to the network and stored in the storage unit 23 of the handy terminal 10 and the current day average electricity It is used to calculate the average CO2 reduction amount for the current month by multiplying the reduction amount by the CO2 emission factor.

  In the family composition data, the year, month, and number of families are stored for each customer number. Before the meter reading, the meter is connected to the network and stored in the storage unit 23 of the handy terminal 10 and stored in the storage unit 23 of the current month and the number of families in the same month last year. Are compared and used to determine if there is a change in family structure between the same month last year and the current month.

  As for the climate data, the district, year, month, and average temperature are stored for each customer number, connected to the network by the meter reader before meter reading, and stored in the storage unit 23 of the handy terminal 10 and average temperature for the same month in the previous year and the current month. Used for comparison.

  The meter reading date data includes the year, month, and number of days used for each customer number. Before meter reading, the meter is connected to the network and stored in the storage unit 23 of the handy terminal 10 and is stored in the memory unit 23 of the same month in the previous year and the current month. Used to calculate usage.

  In the target value data, the year, month, target CO2 reduction amount is stored for each customer number, connected to the network by the meter reader before meter reading, stored in the storage unit 23 of the handy terminal 10 and the presence or absence of the target CO2 reduction value In addition, it is used to calculate an electricity rate using a target achievement discount rate when the target CO2 reduction value is achieved.

  The environmental discount rate data stores CO2 reduction amount and environmental discount rate for each fiscal year and month, and is connected to the network by the meter reader before meter reading, stored in the storage unit 23 of the handy terminal 10 and stored in the electricity bill for the current month. It is used to calculate electricity charges by applying the environmental discount rate by multiplying the environmental discount rate according to the CO2 reduction amount.

  The target achievement discount rate data stores the target achievement discount rate for each fiscal year and month, connects to the network by the meter reader before meter reading, and is stored in the storage unit 23 of the handy terminal 10 to achieve the target CO2 reduction value It will be used to calculate the electricity rate using the target achievement discount rate.

  As shown in FIG. 3 and FIG. 4, at the time of meter reading, the number of instructions of the electric meter for the current month of the customer is input from the input unit 21 of the handy terminal 10 by the meter reader. Number of meter indications for the current month input, electricity usage, CO2 emission factor, family composition, target value, environmental discount rate, target achievement discount rate, climate, downloaded from the server 30 installed in the power company in advance Using the data in each database on the meter reading date, the calculation unit 19 calculates the CO2 reduction amount for this month and the electricity rate to which the discount rate is applied according to the CO2 reduction amount.

  Specifically, the meter reader confirms the number of instructions for the electric light meter of the customer for the current month and is input to the input unit 21 of the handy terminal 10 (step S40). The number of indications for the electric meter for the current month and the number of indications for the previous month and the number of indications for the current month downloaded in advance from the electricity usage database of the server 30 and stored in the electricity usage data 11 of the storage unit 23 of the handy terminal 10 The subtraction value for the current month is calculated from the difference between the two, and the electricity usage is calculated from the subtraction value (step S41).

  Next, if the amount of electricity used in the current month has decreased since the same month of the previous year, it is possible that the CO2 emission has been reduced.

  Specifically, since the number of days of electricity used in the same month of the previous year and the number of days of electricity used in the current month differ depending on the meter reading date, the days of electricity used are corrected. The electricity usage amount of the current month is divided by the number of electricity usage days of the month stored in the meter reading date data 15 of the storage unit 23 of the handy terminal 10 in advance from the meter reading date database of the server 30 to obtain the daily average electricity usage amount of the month. Calculate (step S42).

  The handheld terminal 10 is downloaded in advance from the meter reading date database 34 of the server 30 in advance of the same month of the previous year, which is downloaded in advance from the electricity usage database of the server 30 and stored in the electricity usage data 11 of the storage unit 23 of the handy terminal 10. The amount of electricity used per day in the same month of the previous year is calculated by dividing by the number of days of electricity used in the same month of the previous year stored in the meter reading date data 15 of the storage unit 23 (step S43).

  The daily average electricity consumption for the current month is subtracted from the daily average electricity consumption for the same month of the previous year to calculate the average electricity reduction for the current month. If the value of this calculation result is a positive value, it is determined that the customer has consciously reduced the amount of electricity used compared to the same month of the previous year, and the process proceeds to the next family composition condition (step S44). If the value of the average electricity reduction amount for the current month is negative, it is determined that the amount of electricity used has not been reduced compared to the same month of the previous year, and a normal electricity charge corresponding to the amount of electricity used for the current month is calculated (step S54).

  On the meter reading slip, customer name, location of use, electricity usage period of the month, meter reading date, scheduled billing amount, fee breakdown, contract type, number of instructions for the current month, number of instructions for the previous month, deducted value of the number of instructions from the current month to the previous month, district number The customer number, electricity bill receipt, etc. are printed (step S55).

  The number of families of the current month that is stored in the family composition data 13 of the storage unit 23 of the handy terminal 10 after downloading from the family composition database 31 of the server 30 in advance the family structure of the customer as of the same month of the previous year and whether or not the family structure has changed in the current month And the number of families of the same month in the previous year stored in the family configuration data 13 of the storage unit 23 of the handy terminal 10 downloaded in advance from the family configuration database 31 of the server 30.

  Furthermore, if the value of the comparison result is a positive value that the number of families in the current month is considered to be the same or increased compared to the same month in the previous year, it is determined that there has been a reduction in electricity consumption, and the Proceed to the comparison condition (step S45). If the value of the comparison result is negative, it is determined that there has been no reduction in the amount of electricity used, and an electricity bill corresponding to the amount of electricity used in the current month is calculated (step S54).

  Next, whether or not there is a change in the climate is downloaded in advance from the climate database 33 of the server 30, and the average temperature of the same month last year stored in the climate data 14 of the storage unit 23 of the handy terminal 10 is downloaded in advance from the climate database of the server 30. This is performed by comparing the average temperature of the current month stored in the climate data 14 of the storage unit 23 of the handy terminal 10.

  If the average temperature in the same month of the previous year is equal to or lower than the average temperature in the current month, it is determined that the customer has consciously reduced the amount of electricity used, and the process proceeds to the next calculation of CO2 reduction (step S46). If the average temperature of the same month in the previous year exceeds the average temperature of the current month, an electricity charge corresponding to the amount of electricity used in the current month is calculated (step S54).

  In the above electricity usage, the average electricity usage on the current day is lower than the average usage on the same month in the previous year, or in the family composition, the number of families in the same month in the previous year is the same as or higher than the number of families in the same month. As described later, the process proceeds to a step of calculating an electricity bill to which an environmental discount is applied, in a case where each condition of whether the average temperature is equal to or exceeds the average temperature of the current month is satisfied.

  Daily average CO2 reduction for the current month by multiplying the daily average electricity reduction amount for this month by the CO2 emission factor downloaded in advance from the CO2 emission factor database 32 of the server 30 and stored in the CO2 emission factor data 12 of the storage unit 23 of the handy terminal 10 The amount is calculated (step S47).

  Whether the target CO2 reduction value is presented by the customer by the target value data 16 downloaded in advance from the target achievement discount rate database 32 of the server 30 and stored in the target achievement discount rate data 18 of the storage unit 23 of the handy terminal 10 (Step S48).

  When the target CO2 reduction value is not presented by the customer, it is downloaded from the environmental discount rate database of the server 30 corresponding to the CO2 reduction amount in advance for the current electricity bill and stored in the environmental discount rate data 17 of the storage unit 23 of the handy terminal 10. The monthly electricity rate after applying the environmental discount rate is calculated by multiplying the current environmental discount rate (step S49).

  On the meter reading slip, customer name, location of use, electricity usage period of the month, meter reading date, scheduled billing amount, fee breakdown, contract type, number of instructions for the current month, number of instructions for the previous month, deducted value of the number of instructions from the current month to the previous month, district number The customer number, electricity bill receipt, etc. are printed (step S50).

  When the target CO2 reduction value is presented from the customer downloaded in advance from the target value database of the server 30 and stored in the target value data 16 of the storage unit 23 of the handy terminal 10, the CO2 reduction of the current month from the target CO2 reduction amount of the current month The amount is subtracted, and if the value of the calculation result is a positive value, the process proceeds to the next condition (step S51). If the value of the calculation result is negative, an electricity charge corresponding to the environmental discount rate for the current month is calculated (step S49).

  If the CO2 reduction amount for the current month is subtracted from the target CO2 reduction amount for the current month and the calculated result is a positive value, it is downloaded from the server 30 in advance and stored in the target value data 16 of the storage unit 23 of the handy terminal 10. It is determined that the customer has achieved the CO2 reduction target value set in advance, and is downloaded from the server 30 in advance to the electricity rate to which the environmental discount rate is applied and stored in the target achievement discount rate data 18 of the storage unit 23 of the handy terminal 10 The electricity charge to which the target achievement discount rate is applied is calculated by multiplying the target achievement discount rate (step S52).

  On the meter reading slip, customer name, location of use, electricity usage period of the month, meter reading date, scheduled billing amount, fee breakdown, contract type, number of instructions for the current month, number of instructions for the previous month, deducted value of the number of instructions from the current month to the previous month, district number The customer number, electricity bill receipt, etc. are printed (step S53).

FIG. 6 shows an example of the meter reading slip output by the electricity bill environment discount system in the embodiment of the present invention. After the meter reading is completed by the customer, the meter reader prints out a meter reading slip on the handy terminal that includes the number of instructions for the current month, the number of instructions for the previous month, electricity usage, electricity bill, CO2 reduction discount for this month 100, environment discount rate 101 for this month, etc. As a result, the customer can be notified of the CO2 reduction discount rate and the environmental discount rate at an early stage.
Of course, the paper on which the discount fee is printed may be printed separately from the system and mailed to the customer.

  Although the embodiment of the present invention has been described above, the present embodiment is merely a specific example, and the present invention is not limited to this embodiment. Further, the effects described in the embodiments of the present invention only list the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to the effects described in the embodiments of the present invention.

It is a figure which shows the structure of the electricity bill environment discount system in one Embodiment of this invention. It is a figure which shows the example of the external appearance of the handy terminal in one Embodiment of this invention. It is a flowchart (the 1) which shows the content of the information processing in a handy terminal. It is a flowchart (the 2) which shows the content of the information processing in a handy terminal. The table data structure stored in the server in the electric power company of the electricity bill environment discount system in embodiment of this invention is shown. It is a figure which shows the example of the meter-reading slip which the electricity bill environment discount system in embodiment of this invention output.

Explanation of symbols

1 Electricity Price Environmental Discount System 10 Handy Terminal 11 Electricity Usage Data 12 CO2 Emission Factor Data 13 Family Composition Data 14 Climate Data 15 Meter Reading Date Data 16 Target Value Data 17 Environmental Discount Rate Data 18 Target Achievement Discount Rate Data 19 Calculation Unit 20 Printing Unit 21 Input unit 22 Display unit 23 Storage unit 30 Server 40 Network

Claims (4)

An electric rate environment discount system configured are connected to each other via the server and leaves down and de-terminal network that provides services to promote the reduction of CO2 emissions to the customer,
The handy terminal is
Based on the current month indication number input from the input unit of the handy terminal and the previous month indication number stored in the storage unit of the handy terminal, an electricity usage amount calculation unit that calculates the electricity usage amount for the current month;
Calculate the average electricity usage for the current month by dividing the electricity usage for the current month calculated by the electricity usage calculator by the number of days used for the current month, and the previous year of the same month stored in the storage unit of the handy terminal. A correction unit that calculates the average amount of electricity used the same month last year by dividing the amount of electricity used in the same month by the number of days of electricity used in the same month of the previous year;
A daily average electricity usage comparing unit that compares the average electricity usage of the current month calculated by the correction unit and the average electricity usage of the same month of the previous year;
Based on the number of family data of the same month last year and the number of family data of the current month stored in the storage unit of the handy terminal,
Based on the average temperature data of the same month in the previous year and the average temperature data of the current month stored in the storage unit of the handy terminal, an average temperature comparison unit that compares the average temperature of the current month and the average temperature of the same month of the previous year,
As a result of the comparison of the daily average electricity usage comparison unit, the family composition comparison unit and the average temperature comparison unit, the average electricity usage of the current month is less than the average electricity usage of the same month last year, and the number of families in the current month Depending on the data at the time of meter reading, the electricity rate applied with a predetermined environmental discount rate is based on the condition that the number of family members is equal to or greater than the number of families in the same month of the previous year and the average temperature of the current month is equal to or higher than the average temperature of the same month of the previous year. An environmental discount electricity rate calculation unit to calculate
Electricity fee environment discount system with. The environmental discount electricity rate calculation unit
A CO2 reduction amount calculation unit that calculates the current day average CO2 reduction amount by multiplying the current day average electricity usage amount by a CO2 emission coefficient;
A target achievement discount calculation unit for calculating an electricity rate by applying an additional discount rate to a predetermined environmental discount rate, on condition that the target value of the CO2 reduction amount requested by the customer is achieved in the average CO2 reduction amount on the current day; ,
The electricity rate environment discount system according to claim 1, comprising: The handy terminal is
A printing unit that prints the calculated electricity bill and the applied environmental discount rate on the meter reading slip,
The electricity rate environment discount system according to claim 1 or 2 , further comprising: The server includes the previous month indication number, the same month last year electricity usage, the same month last year electricity usage day, the previous year same month family number data, the current month family number data, the previous year same month average temperature data, the current month A database for storing average temperature data and data including the environmental discount rate;
The storage unit of the handy terminal stores various data received from the database via the network,
The electricity bill environment discount system according to any one of claims 1 to 3 .

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