Calculation for Net metering rooftop solar system using thumb rule
SL. 
Topics 
Quantity 
Unit 

1. 
Area of Rooftop, Unit:

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. 

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. 
Installed capacity of Solar Module to acheive the 3x [ Normally 1.2 times of the AC output Capacity] 
: 
times 
5. 
Approximate installation cost for 1 kWp rooftop solar system with 1 kW inverter 
: 
Thousand Taka 
6. 
Annual approximate electricity generation from the proposed 4x kWp rooftop solar system Select the Calculation mode: For Method1: SOLARGIS PVOUT : For Method2: Plant Capacity Factor : % For Method3: Annual average of AC output per kWp solar system per day : kWh/kWp/day 
Note: Insert any one of the input in the left side and select the method accordingly.


7. 
Select your Retail Electricity Tariff : 
Taka/kWh 

8. 
VAT 
: 
% 
9. 
Select your utility to get the 33kV Bulk Tariff : 
Taka/kWh 
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 