An Intereactive spread sheet for cost calculation for Solar PV in Sri Lanka homes with CEB supply compares the rates

1. PV Costs and Output Calculations for Sri Lanka house with CEB Connections
An Interactive Solar PV generation cost Calculator items in yellow can be changed
KW system 1 Assuming a house installs 1kW system
hours of sun / day 6 If you can mount facing the south at Latitude you can get up to 7
kWh's / day 6 With a solar tracker more energy can be obtained assume no shading
kWh's / year 2190
in Rs
loan amount $2,970.00 311,850
Interest rate (annual) 19%
loan length (years) 10
monthly payment ($54.58) (5,731)
total interest ($3,579.31) (375,827)
total paid ($6,549.31) (687,677)
annual output (kWh's) 2190
design life (years) 25
Overall system cost 3000 assuming $3/Wp installed QS Solar now selling at $1/Wp
tax credits 30 or Carbon CDM
loan interest ($3,579.31) (375,827.07)
Maintenance $300.00 31,500.00
total expenditure $6,849.31 719,177.07
Rs
pv rate (kWh) $0.13 13.14
current utility rates (kWh) $0.39 41.00 For a home consuming more than 600 unites/month with FAC
$0.33 35.00 For a home consuming more than 180 unites/month up to 600 kWh
$0.20 21.00 For a home consuming more than 90 unites/month up to 180 kWh/m
CEB Tariff rates effective from 1st November 2008
Tariff category Unit Fixed
charge charge This will increase from year to year
(Rs/kWh) (Rs/month)
Domestic Purpose
For those who consume -
up to 30 units per month 3 60
in excess of 30 and up to 60 units per month
4.7 90
in excess of 60 and up to 90 units per month
7.5 120
in excess of 90 and up to 180 units per 16
month 180
in excess of 180 and up to 600 units per month
25 240
above 600 units 30 240
* Fuel Adjustment Charge 30% on all unit charges except DP & RP consuming less than 90 units. month
Is Solar Energy a viable option for Sri Lanka

3. EB Connections
can get up to 7
assume no shading
600 unites/month with FAC
180 unites/month up to 600 kWh/month with FAC
90 unites/month up to 180 kWh/month with FAC
from year to year