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 

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: Plant Capacity Factor : % For Method2: 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. 
Retail Electricity Tariff [Provided by BERC] 
: 
Taka/kWh 
8. 
VAT 
: 
% 
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 