JP2002230101A - Method and system for collecting power rate of electrical equipment with discount power rate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system by which a customer can receive prescribed discount of power rates for a predetermined period when electrical equipment is purchased, though the power rates were not considered when the customer purchased the electrical equipment. SOLUTION: The system is characterized by a collecting method of the power rates such that a purchaser of electrical equipment with discount power rates is registered in an ESP member, an ESP calculates the discount power rates predetermined by every piece of the electrical equipment, makes a power supplier charge the power rates by giving a discount of them to the ESP member, or to charge the power rates from the ESP or a discount portion is paid to the member customer from the ESP. In addition, this power rate collection system is constituted of a first database regarding the customer, a second database regarding a target product and a discount power rate calculating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a service for supplying electric power when a customer purchases an electric device, and more particularly, to an electric device with a discounted electric charge for providing a predetermined electric device with the electric charge for a predetermined period. The present invention relates to a method and system for collecting electricity charges.

[0002]

2. Description of the Related Art When an electric device is purchased, its electric power is
The purchaser will be supplied by a power supplier who has contracted for the supply of power. If electric appliances are newly purchased in sequence, the power consumption increases accordingly. Therefore, the electricity bill gradually increases.

[0003] Among electric appliances used at home, that is, household electric appliances, products having relatively low power consumption include:
2. Description of the Related Art Various types of electric devices are used, such as devices that consume large amounts of power and are used continuously, and devices that use time greatly vary depending on the season and temperature, such as air conditioners.
Various types of electrical equipment are being developed with the aim of providing comfortable living. Indispensable devices may differ depending on the region, but it is a fact that many electric devices are being provided as auxiliary facilities as a residence.

As described above, although the use of electric equipment may increase, it never decreases, and various equipment tends to be purchased and used. Therefore,
The proportion of electricity bills in daily life has been increasing year by year.

[0005]

In the above-mentioned prior art, when a customer purchases an electric device, the power consumption increases accordingly, and of course, the electricity bill also increases. Although it is still good for a device with low power consumption, if a device with high power consumption is purchased, the electricity rate will increase sharply. In ordinary homes, the use of air conditioners during intense heat is one of the factors that significantly increases electricity rates.

[0006] An object of the present invention is to provide, when a customer purchases a predetermined electric appliance, a part of the electricity bill according to the power consumption of the electric appliance for a specific period after the purchase. An object of the present invention is to provide a method and a system for collecting an electricity bill of an electric appliance with a discount electricity bill for supplying electric power.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when a customer purchases a specific electrical device, the customer who subscribes to the power supply service system is provided with an electric power in which a part of the power rate is discounted for a specific period. Is a sales service system for electrical equipment including an electricity fee, which services the supply of electricity, and is specifically realized as follows.

[0008] In a method in which an electric power provider (ESP), which has a contract to receive power supply with an electric power supplier, collects electric charges of a user who purchases electric equipment, the electric equipment purchaser becomes a member of the provider. Registering, the provider constructs a first database that stores the personal information of the electrical equipment purchaser, and establishes a second database that stores the products specified by the electrical equipment maker as the target products for the electrical charge discount. Constructing and calculating a discounted electricity rate of the electric equipment of the electric equipment purchase / registering member based on the data stored in the first and second databases, and the power supplier calculates the discounted electric rate as the The feature is that it is collected from registered members.

[0009] The first database is constructed from a member's name, address, purchased electrical equipment name, maker's name, and a name of a power supplier receiving power supply, and the second database is provided. Is constructed from the name of the electric equipment, the name of the manufacturer thereof, and the formula for calculating the discounted electric charge, and the discounted electric charge of the electric equipment stored in the second database is determined corresponding to the electric equipment. There is a feature.

[0010] The discounted electric charge of the electric device stored in the second database is determined for the electric device and is applied for a predetermined period, and is stored in the second database. The discounted electricity rate for the electrical equipment is set in accordance with the electrical equipment and is an annual reduction method.
The discounted electricity rate of the electric device stored in the database is determined by the provider based on the basic formula determined by the device maker corresponding to the electric device, and the discounted electricity price of the electric device stored in the second database is The fee is calculated based on a calculation formula defined for the electrical device, and the discounted electrical fee for the electrical device stored in the second database is determined by determining the cumulative power consumption of the device of the same manufacturer. It is characterized in that when the value is exceeded, it is calculated based on a formula for calculating a predetermined discount fee.

[0011] Further, the electric power supplier bills the member for the electricity bill of the member, and the provider has a first database storing personal information of the electric appliance purchaser and a maker of the electric appliance for discounting the electricity bill. Calculating a discounted electricity rate of the electric appliance of the electric appliance purchase registration member based on the second database storing the product designated as the target product, the provider pays the electric power supplier to the electric power supplier, and Collecting the discounted electricity rate from the registered member, the power supplier billing the member for the electricity rate, the provider providing a first database and an electrical device storing personal information of the electrical device purchaser. The electrical equipment purchase registration member based on a second database storing products designated by the manufacturer as a target product of the electric charge discount. It calculates the discounted electricity charge of the electrical device, wherein the provider to pay the discount amount of electricity charges to the registered member, is characterized in.

[0012] Also, means for registering a member of the electrical equipment purchaser to the provider, the provider comprising: a first database for constructing and storing personal information of the electrical equipment purchaser;
A second database for constructing and storing a product designated by the manufacturer of the electrical device as a target product for the discount on electrical charges, and the electrical device purchase registration member based on data stored in the first and second databases. Means for calculating the discounted electricity rate of the electrical equipment, and means for transmitting the discounted electricity rate to the power supplier, wherein the power supplier collects the discounted electricity rate from the registered member. It is unique.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an outline of a system according to the present invention for providing a power supply service with the purchase of electric equipment. The specific content of the service is a system for collecting a part of the electricity charge of the customer by discounting it. FIG. 1 shows the entire configuration diagram. In FIG. 1, reference numeral 5 denotes an electric equipment dealer, which sells various electric equipment to customers. The customer 8 purchases electrical equipment at this store.

5a shows the flow of purchase of the product of the customer 8. For the products purchased here, the dealer is ESP
(Power supply provider) Join the members of 10 and determine whether or not to receive the electricity rate discount service.
Check in n). The store 5 registers and transmits the customer's personal information 10a to the ESP 10 based on the intention display 5b to join the power supply service member (of course, the purchaser may also perform the member registration procedure).

The ESP 10 determines whether the manufacturer of the product purchased by the customer is a product of a manufacturer registered in the ESP 10 (the signal 10b is registration information from the manufacturer 6), and Check if the product is registered as a target product of the power supply service. Of course, the manufacturer displays the product on the product in advance so that the purchaser can understand that fact.

The store 5 knows whether the product purchased by the purchaser is the target product. Generally, it is grasped by information from a maker (for example, data as shown in FIG. 4 described later). The ESP 10 confirms the above from the personal data of the customer just in case.

Reference numeral 6 (generally, a plurality of manufacturers) denotes a factory of a manufacturer that manufactures the product, and reference numeral 6a denotes a product delivered from the factory to a store and product information. 10b is E
Provide manufacturer information to SP10. For example, information such as a change in a service target device, a change in a discount rate or a change in a period due to the development of an energy-saving product, and the like are included.

[0018] ESP10 checks the information from the dealer,
If the product purchased by the customer is a power supply discount target product, the customer is notified of the discount rate of the customer's electricity rate to the power supplier PS5 (10d). The power supplier PS5 invoices the customer for the deducted electricity rate (8a) and has it delivered (8d). On the other hand, the discount is billed to ESP10 from PS5 (PS5d)
Then, the ESP 10 pays the electricity supplier for the electricity fee (10e).

Here, PS (PS1 to PS5) is E
SP10 represents a power supplier with whom a power supply contract is made. PS5 ₁ to PS5
PS5 _n indicates supply of power to the customers C1 to Cn. 8an represents the billing of the discounted electricity bill to the customer Cn, and 8dn represents the delivery of the electricity bill from the customer Cn.

As described above, the purchaser of the device can use the device while receiving the discount of the electricity rate. Also ESP
(10) has contracts with many members,
You can sign a contract with a power supplier (PS) as a large power consumer. Therefore, power can be supplied at a relatively low electricity rate.

That is, compared to the case where the customer himself makes a contract with the electric power supplier to receive the electric power individually, the purchased electric equipment can be supplied with the electric power at a lower electric charge. In other words, ESP purchases electricity at a low electricity rate as a large consumer and supplies it to customers.

Therefore, even if the customer pays a part of the electric charge for the electric equipment purchased, the business can be realized. Further, depending on the form of collection of the electricity fee, the business cost can be charged to the power supplier, and the sales promotion cost can also be charged to the manufacturer, so that a more effective business form can be realized. Hereinafter, this business form will be described in detail.

FIG. 2 shows a store 5, a customer 8, an ESP 10,
It shows the flow of information to and from the power supplier PS. Information between them is performed using, for example, the Internet. Step S20 is a step of transmitting the customer data to the ESP 10 after confirming whether or not the store selling the electric equipment has joined as a member of the customer's power supply service system (for example, via the Internet transmission / reception line IL1). . ESP
In step 10, this information is received in step S22 and registered as customer information.

The customer information referred to here is, for example, information as shown in FIG. Customer name (C1 to Cn), address (add1 to addn), purchased electrical equipment name (AP1, B
P1, CP15, AP10, etc.), product manufacturers (A ~
C) Then, the customer is made up of power suppliers (PS1 to PS5) to which power is supplied, and a database is constructed. Although the number of customers is increasing, the electricity supplier is largely determined by the customer's address.

[0025] However, in some places, relatively small power suppliers may be scattered, and in some cases, customers may be supplied with power from the nearest power supplier. In such a case, the customer is required to declare the trader. Then, the ESP 10 must confirm whether or not the contractor has contracted.

In the name of the purchased electric product in FIG. 3, AP6 means that the manufacturer is A and is the sixth product in the product list.
The power supplier name column indicates that the ESP 10 has contracts with five power suppliers (PS1 to PS5).

In step S24 in FIG. 2, for example, it is confirmed from a database as shown in FIG. 3 whether or not the product is a product to be discounted on electricity bills, and then the process proceeds to the subsequent process. If the product is not a target product (N in step S24), information is transmitted to the dealer to that effect. In some cases, we will contact the customer directly. If the product purchased by the customer is the target product (Y in step S24), step S
At 30, a discounted electricity fee for the product is calculated.

The ESP 10 has a database of discounted products for each manufacturer. An example is shown in FIG. The target device in the case of maker A indicates that the target device is AP1 to AP10, that is, 10 products. FIG. 4 is simplified for convenience of explanation, but actually more products are registered as target products. Manufacturer B
Is BP1 to BP20, and maker C is CP1
To CP15 are registered as target products.

That is, the ESP 10 is provided by manufacturers A, B, C,
And 45 products in total (10 products for manufacturer A, 20 products for B, 15 products for C)
Is shown. Further, in the column of the calculation method of the discounted electricity rate, each manufacturer has a basic formula of the calculation method, and not all are common.

In general, the calculation method (basic expression) differs depending on the product. Even for the same product, the calculation method may differ depending on the manufacturer. An example of them is F
Shown as 1 to F5. Hereinafter, examples of the calculation basic formula will be described.

F1 method: Flat-rate method (one year) determined from the nominal (or rated) power consumption of the electric device F1 = (P (nominal power consumption of device) × k (coefficient) × tm
(Average usage time) x PF (Electricity rate per KWH)) F2 method: Flat-rate method (one year) determined from the purchase price of the electric equipment F2 = PR (purchase price) x S (coefficient) (nominal power consumption F3 method; stepwise reduction method (3 years, modification of F1) F3 (1) = P (nominal power consumption of device) × k1 ( coefficient)
Xtm (average usage time) x PF (power rate per KWH)) ... first year F3 (2) = P (nominal power consumption of equipment) x k2 (coefficient)
Xtm (average usage time) x PF (power rate per KWH)) ... second year F3 (3) = P (nominal power consumption of equipment) x k3 (coefficient)
Xtm (average usage time) x PF (power rate per KWH) 3rd year The coefficient k has a relationship of k1>k2> k3.

FIG. 5 is a schematic diagram showing this. Although the number of years for which the discount fee is applied is multiple years, it is a so-called annual reduction method. This is an example of a case in which this is performed by counting k.

F4 method: Calculation method based on the cumulative total of devices of the same maker (one year) Applicable only when Pt (sum of nominal power consumption of the same maker device)> P0 (predetermined power). In this case, there are the following cases (1) and (2). (1) F4 = (Pt−P0) × α1 (coefficient) × tm × P
F ... (one year) (2) F4 = Pt x α2 (coefficient) x tm x PF ...
(1 year) α1> α2.

This is because even if the power consumption of a single product is small, if the total nominal (or rated) power consumption of devices of the same maker exceeds a predetermined value, the device is subject to a discounted electricity rate. is there. Even if the product is not a single product, the product is eligible if the total nominal power consumption of products of the same manufacturer exceeds a predetermined value.

In this case, there is a case where the discounted charge is applied to the portion where the nominal power consumption exceeds a predetermined value, and a case where the discounted charge is applied to a predetermined ratio of the total nominal power consumption exceeding the predetermined value. . FIG. 6 schematically shows this.

That is, when the discounted rate is applied to (Pt−P0) ((Pt−P0) × α1), the discounted rate is applied to a predetermined percentage (α2) of Pt, ie, (Pt × α2). It may be applied.

In some cases, a lower limit is provided for Pt, and a discount fee may be applied when Pt exceeding P0 and winning also exceeds a predetermined value. In the case of this calculation method, it is necessary to check records such as the year of the product and the year of purchase. It is necessary to set restrictions such as considering only products of the same manufacturer purchased in the past year or only the past three years.

F5 method; seasonal fluctuation method (3 years) F5 = (P (nominal power consumption of equipment) × ks (coefficient) × t
ms (average usage time depending on the season) × PF (power rate per KWH)) The coefficients ks and tms are variable depending on the season or are variable depending on the usage schedule.

Basically the same as F1, except that the coefficient k
s or the set value of the average use time tms depending on the season. A schematic diagram is shown in FIG. This is also complicated as in the case of the above F4, but has a great merit when the seasonal usage state is clear or when the usage schedule of the customer is determined.

When these calculation formulas are directly used by the calculation formula given by the manufacturer, the ESP is calculated based on the manufacturer information.
, But the latter is often used in many cases in consideration of the business as an ESP. ESP
Then, it is often the case that the original formula is modified based on this basic formula. Most of them take into account the business as an ESP, and generally modify coefficients.

Returning to the description of FIG. 2, in step S30, a discounted electricity rate is calculated by the above-described method. In step S32, the result is notified to the power consuming customer 8 and the power supplier PS (PS5 in the example of FIG. 1) to the customer 8 (for example, via the Internet transmission / reception line IL2). The customer 8 can know the discounted price of the purchased electric device.

When contacting the power supplier PS, the calculation formula itself is transferred to the PS side, the PS side calculates the discounted power rate of each customer, and subtracts this to charge the customer for the power rate. One is that the ESP side may calculate the monthly discounted electricity rate and contact the PS side. In the former case, the PS side performs the calculation of the discount rate for each customer in the conventional calculation of the power rate when charging the power rate.

In step 34, the formula for calculating the discounted electricity rate for each customer from the ESP is registered on the PS side, and is used when calculating the monthly electricity rate for each customer. Step S3
At 6, the electricity supplier calculates the discounted charge as described above, and bills the customer notified by the ESP 10 of the electricity charge after subtracting the discounted charge (8 in FIG. 1).
a). Then, the customer confirms the discounted power rate (step S28) and pays to the power supplier PS5 (steps S29 and 8d).

On the other hand, the ESP 10 stores the discount amount of the customer,
In step S36, a request is made (PS5d in FIG. 1), the ESP confirms this in step S38, and pays it to, for example, PS5 in step S40 (10e in FIG. 1). In this example, the electric power supplier uses the formula for calculating the discount of the electric charge from the ESP on the PS side and bills the customer. However, the electric power supplier PS supplies only the electric power and collects the electric charge. May all be performed by the ESP. A first modification of the present invention will be described below.

FIGS. 8A and 8B show a modification of the present invention, in which FIG. 8A shows the overall configuration, and FIG. 8B shows the information flow and processing flow. The electric power supplier supplies only electric power to the customer, and the ESP 10 collects the electricity bill. FIG. 8A shows an example of the customer C1. Supply PS5 ₁ of power to the customer is the same as that of FIG. Electricity billing (8
a) from the ESP and delivery (8d) also to the ESP. That is, the billing and delivery of the discounted electricity bill are performed between the customer and the ESP.

In response to the request from the PS5, the ESP calculates the electricity bill in consideration of the discount of the customer and bills the customer C1. In this case, the electric power supplier calculates the bill (80a) for the customer C1 in the calculation of the normal electricity bill by the ES.
Delivery to P (80d) is also made from ESP to PS5. Therefore, the PS side has the characteristic that it is possible to greatly reduce the trouble since it is only necessary to bill the normal electricity bill for the ESP treatment.

FIG. 8B is a partial flow chart of the processing. In step S82, a normal electricity bill for each customer is calculated.
A charge is made to the ESP 10 by 83. Defining the electricity bills for individual customers is the same as usual, but they can be billed together to the ESP. Based on these data, the ESP 10 calculates a discount rate for each customer (step S84), and bills the customer a discounted electricity rate (steps S85 and 8a). This is the same as the request (8a) from PS5 to the customer C1 in the example of FIG.

The customer confirms this in step S87,
In step S88, the ESP is paid (8b). In step S85, the electricity rate charged by the PS is
Side pays (80d), and the PS confirms this (step S89).

As described above, in the case of FIG. 8, the ESP performs the billing and collection of the electricity bill collectively. Therefore, in addition to the large-scale power consumption contract, the ESP collects electricity bills (proxy work), so that considering the operation costs, it is possible to supply even lower power.
P also has advantages. The operating cost in that case is ES
It depends on the contract with the PS side according to the total number of customers or the total amount of electric power handled by P.

FIG. 9 shows a modification of the present invention. FIG. 9A shows an overall configuration of a system in which a normal electricity bill is charged and collected directly from the PS side to the customer, and the discounted electricity bill is paid from the ESP to the customer. In this case, the customer can feel the discounted electricity rate, that is, this modification is characterized by the discounted electricity rate (11) paid by the ESP to the customer.

FIG. 7B shows a flow chart of this processing and information. The electricity bill for each customer calculated in step S82 is billed directly to the customer in step S96 from the PS side, and the delivery is confirmed (80a, 80d). For the PS side, this is the same task as before. On the other hand, in the ESP, the discounted charge is calculated in step S92 in consideration of the situations shown in FIGS. 2 to 7 and the like, and the discounted electric charge (11) is refunded.

[0052] Therefore, since a part of the payment is returned to the customer, there is a feature that the discounted electricity rate can be realized.

Here, the business situation as the ESP 10 is arranged and shown in FIG. Here, a case is shown in which the ESP 10 substitutes for the billing and collection of the electricity bill. Figure 1
0 (A) represents the merits of the ESP in the case of the business according to the present invention. FIG. 11B summarizes the merits of manufacturers, power suppliers, and customers in the case of business according to the present invention. ESP can charge for those benefits.

The ESP can promote sales to manufacturers who subscribe to the sales system according to the present invention, so that the ESP can charge for the system. For example, according to the number of products handled by the system or the total power consumption of the products of the maker A, calculation can be performed according to a predetermined calculation formula, and the system can be charged to the maker.

Further, since the ESP 10 has contracted with the power supplier PS as a large power consumer, it is possible to secure power at a lower power rate than ordinary consumers. So even if you supply the same amount of electricity to your customers,
Profit can be expected. Also, since the business of billing and collecting the electricity fee is performed on behalf of the business, the business cost can be billed to the PS side.

Since the PS side can also collect the electricity fee, there is a great merit even if the service cost is paid. It is also preferable that the number of large customers increases on the PS side. The customer purchases electrical equipment because there is a discount on the electricity rate for the customer. If this happens, the power consumption will increase, leading to an increase in profits.

[0057]

According to the electricity bill collection according to the present invention, a customer can use purchased electric equipment at a low electricity bill, and a provider (ESP) can supply power at a relatively low electricity bill. Business effect can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a power supply and electricity bill service system accompanying the sale of electric equipment (home electric appliances).

FIG. 2 is a processing flowchart of information between a store, an ESP, and a PS.

FIG. 3 is a diagram for explaining a database of customer information.

FIG. 4 is a diagram illustrating a calculation of a product to be discounted and a discounted electricity fee.

FIG. 5 is a diagram showing a change in coefficient over time.

FIG. 6 is a diagram for explaining the concept of discounting the accumulated electric energy of products of the same maker.

FIG. 7 is a diagram illustrating changes in seasons or operation schedules and coefficients.

FIG. 8 is a diagram for explaining a modified example of the present invention.

FIG. 9 is a diagram for explaining another modified example of the present invention.

FIG. 10 is a diagram illustrating a business state according to the present invention.

[Explanation of symbols]

5; electrical equipment (home appliance) dealer, 6; manufacturer,
8: Customer (C1 to Cn), 10: ESP, PS; Power supplier (PS1 to PS5), IL1, IL2: Transmission / reception line (Internet)

Continued on the front page (72) Inventor Yasushi Tomita 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside the Hitachi Research Laboratory, Hitachi, Ltd. (72) Inventor Harumi Uchigasaki 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Hitachi Research Laboratories (72) Inventor Tadakatsu Nakajima 502, Kandate-cho, Tsuchiura-shi, Ibaraki F-term, Machinery Research Laboratories, Hitachi, Ltd. 2F075 GG06 GG17

Claims (13)

[Claims] An electric power supply provider (ESP) having an electric power supply contract with an electric power supplier collects an electric equipment purchase user's electricity bill. Registering as a member, the provider constructs a first database that stores the personal information of the purchaser of the electrical equipment, and stores a second database that stores a product specified by the manufacturer of the electrical equipment as a product to be discounted in electricity rates. Constructing a database, calculating the discounted electricity rate of the electric equipment of the electric equipment purchase registration member based on the data stored in the first and second databases, transmitting the calculated electric charge to the power supplier, A method of collecting an electricity bill for an electric device with a discount electricity bill, wherein the electricity supplier collects the discounted electricity bill from the registered member. 2. The system according to claim 1, wherein the first database is constructed from names of members, addresses, names of purchased electric devices, names of manufacturers, and names of electric power suppliers receiving electric power. A method for collecting electricity bills for electrical equipment with a discounted electricity bill. 3. The system according to claim 1, wherein the second database is constructed from the names of the electric equipment, the name of the maker, and a formula for calculating the discounted electric charge. Method. 4. The electric equipment with a discounted electric charge according to claim 3, wherein the discounted electric charge of the electric equipment stored in the second database is determined corresponding to the electric equipment. How to collect electricity bills. 5. The electric vehicle according to claim 3, wherein the discounted electric charge of the electric device stored in the second database is set for the electric device and is applied for a predetermined period. Electricity fee collection method for electrical equipment with discounted electricity rates. 6. The discounted electric charge for electric equipment stored in the second database according to claim 3, wherein the discounted electric charge is set according to the electric equipment and is an annual reduction method. How to collect electricity rates for electrical equipment with discounted electricity rates. 7. The provider according to claim 4, wherein the discounted electricity rate of the electric device stored in the second database is determined by the provider based on a basic formula determined by the device maker corresponding to the electric device. Electricity fee collection method for electrical equipment with discounted electricity rates. 8. The electric vehicle according to claim 4, wherein the discounted electric charge of the electric device stored in the second database is calculated based on a calculation formula defined for the electric device. To collect electricity bills for electrical appliances with discounted electricity bills. 9. The discounted electric charge of electric equipment stored in the second database according to claim 4, wherein the discounted electric charge of electric equipment of the same maker exceeds a predetermined value. A method for collecting electricity rates of an electric device with a discounted electricity rate, which is calculated based on a formula for calculating a discounted rate. 10. The method according to claim 1, wherein a formula for calculating a discounted electricity rate of the electric device stored in the second database is transmitted to the electric power supplier, and the electric power supplier distributes the discounted electricity according to the equation. And charging the discounted power rate to the member customer, and charging the discounted power rate to the member customer. 11. A method in which an electric power provider (ESP) having an electric power supply contract with an electric power supplier collects electricity bills of an electric equipment purchaser, wherein the electric equipment purchaser provides the electric equipment purchaser with the electric power purchaser. The electricity supplier bills the member for the electricity bill of the member, and the provider has a first database storing the personal information of the purchaser of the electric equipment and a maker of the electric equipment for discounting the electricity charge. Calculating the discounted electricity rate of the electric equipment of the electric equipment purchase registration member based on the second database storing the product designated as the target product of the above, and the provider pays the electric power charge to the electric power supplier. Collecting a discounted electricity rate from said registered member. 12. A method according to claim 1, wherein an electric power provider (ESP), which has a contract with the electric power supplier to collect electric power, collects the electricity bill of the electric appliance purchaser. Register as a member, the power supplier collects the member's electricity bill from the member, and the provider has a first database storing the personal information of the electric equipment purchaser and a maker of the electric equipment which has a discount on the electric charge. Calculating a discounted electricity rate of the electric appliance of the electric appliance purchase registered member based on the second database storing the product designated as the target product of the above, and the provider calculates a discount of the electric charge by the registered member. A method for collecting electricity bills for electrical equipment with a discounted electricity bill, characterized by paying for the electricity bill. 13. An electric power supply provider (ESP) having a contract with a power supply provider to receive power supply, wherein an electric equipment purchaser is a member of the electric equipment purchaser. Registration means, the provider constructs and stores personal information of the electric equipment purchaser, and a second database which constructs and stores products designated by the electric equipment maker as a target product of the electric charge discount. A database, a means for calculating a discounted electricity rate of the electrical appliance of the electrical appliance purchase registration member based on the data stored in the first and second databases, and transmitting the discounted electricity rate to the power supplier. Means, wherein the electricity supplier collects a discounted electricity rate from the registered member, wherein the electricity supplier collects an electricity bill with the reduced electricity rate. Stem.