**Experiment No.:** 6

**Experiement Name: **

Calculation of total energy cost in a Residential Bill.

**Objective:**

To Calculate the total energy cost in a Residential Bill.

**Theory:**

Tariff Scheme of an urban domestic consumer as per WBSEDCL is shown below. We have to calculate the bill on the basis of the tariff chart.

**Calculation of Total Cost of a Residential (Domestic) Bill:**

Let us assume Mr. Michael Faraday, a domestic (urban) consumer of WBSEDCL, His bill details is shown below,

His previous reading of energy meter was **8732 unit** and present reading is **9522 unit**.

Now consumed unit is (9522-8732) =** 790 unit**

MF = 1 (Multiplying factor, upto a certain unit consumption this is taken 1)

Calculation of Variable Cost (Energy Charge):

According to tariff scheme of WBSEDCL, **790 unit** is splitted into several parts,

Quarterly Consumption (Unit) | Rate (paisa) | Amount (₹) |

First 102.00 | 530 | 540.60 |

Next 78.00 | 597 | 465.66 |

Next 120.00 | 697 | 836.40 |

Next 300.00 | 731 | 2193.00 |

Next 190.00 | 758 | 1440.20 |

Total 790.00 | 5475.86 |

**Calculation of Fixed Charge /Demand Charge (in ₹/kVA/month):**

According to tariff scheme of WBSEDCL, **Fixed/Demand Charge** amount is **₹15/kVA/month** (for Domestic-Urban)

For quarterly (3 months) total **Fixed Charge** is (15×3) = **₹ 45.00**

**Calculation of Meter Rent:**

According to tariff scheme of WBSEDCL, **Meter Rent** is ₹ **10.00 per month**

For quarterly (3 months) **total** **Meter Rent** is (10×3) = **₹ 30.00**

**MVCA (Monthly Variable Cost Adjustment) Charge:**

According to tariff scheme of WBSEDCL, **MVCA charge** amount is **23p/kWh**

For quarterly (3 months) **total MVCA** is (0.23×790.00) =** ₹ 181.70**

**LPSC (Late Payment Surcharge Cost):**

LPSC means Surcharge applicable due to non-payment of bill within due date It is chargeable/calculated on day to day basis on total payable bill amount (excluding LPSC element) as per the prescribed rates.

For the Customer** LPSC for one month** is **₹ 1.26**

**Government Subsidy: ** According to tariff scheme of WBSEDCL

**Total Subsidy** is **(-) ₹673.46** **for 3 months**, to be subtracted from total amount.

**Overall Gross Amount Calculation:**

Charges for 3 months (quarterly) | Amount (₹) |

Energy Charges | 5475.86 |

Fixed Charge /Demand Charge | 45.00 |

Meter Rent | 30.00 |

MVCA | 181.70 |

LPSC (for 1 month) | 1.26 |

Total Amount (without Govt. Subsidy) | 5733.82 |

Govt. Subsidy | (-) 673.46 |

Gross Payable Amount (quarterly) | 5060.36 |

**Result:** Therefore Mr. Michael Faraday has to pay **₹ 5060.36 **for** 3 months**.

**The Bill:**

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