Calculation of Net Metering Rooftop Solar System (NPV)
SL. 
Topics [VIDEO TUTORIAL] 
Quantity 
Unit 

1. 
Unit of measurement:

Note: Select the unit and insert your available rooftop area as per definition of Net Metering Guideline2018. You can insert value either in Square Meter or Square Feet Unit. 

Area to power generation factor [Default Value is 9 m^{2}/kWp, You can change it] [For detail understanding, Read 'Net Meteting Guidebook' and Use 'InterRowSpacing Calculator'] 
: 
m^{2}/kWp 

2. 
Sanctioned load of the consumer 
: 
kW 
3. 
Maximum capacity of solar system (cumulative output of inverters) as per "Net Metering Guideline2018" 
70% of Sanctioned load, not more than 10 MW 
kW 
4. 
Actual installed capacity of Solar Module [ DC:AC Ratio, Normally 1.2 times of the AC output Capacity] 
: 
times 
5. 
Approximate installation cost per kWp system (DC Capacity) [You can change the value] 
: 
Thousand Taka 
6. 
Component Replacement Cost @11th year interms of percentage of the initial investment (Inverter and Other Accessories) [You can change the value] 
: 
% 
7. 
Maintenance Cost (Percentage of annual return value) [This value could be less for higher than 1MW system capacity] 
: 
% 
8. 
Insurance (Percentage of Initial Investment per Year) [You can change the value] 
: 
% 
9. 
Annual approximate electricity generation from rooftop solar system on optimum Azimuth and Tilt angle Select the Calculation mode: For Method1: Average of AC output per kWp solar system per year : kWh/kWp/year For Method2: Annual average of AC output per kWp solar system per day : kWh/kWp/day For Method3: Plant Capacity Factor : % For Method4: SOLARGIS PVOUT : 
Note: Insert any one of the input in the left side and select the method accordingly.


10. 
Select your Retail Electricity Tariff : 
Taka/kWh 

11. 
Fist time retail tariff increase after years, Common increase intervals years and Retail Tariff increasing amount Taka/kWh 
Future Tariff Expectation 

12. 
VAT 
: 
% 
13. 
Select your utility to get the 33kV Bulk Tariff : 
Taka/kWh 

14. 
Inflation Factor/Discount Factor [You can change it. Set '0' to avoid the NPV] 
: 
% 
Consider the electricity consumption patern is same as the last year. Insert the last fiscal years electricity consumption 


Month of FY 
Electricity Consumption by the consumer  Unit 
July 
:  kWh 
August 
:  kWh 
September 
:  kWh 
October 
:  kWh 
November 
:  kWh 
December 
:  kWh 
January 
:  kWh 
February 
:  kWh 
March 
:  kWh 
April 
:  kWh 
May 
:  kWh 
June 
:  kWh 