Many of today's typical telecoms towers run either from the mains (EG for Electricity Grid) and/or from diesel generators (or DG). The total cost of the DG is about Rs 3,50,000 which includes 5% VAT. There is a Rs 50,000 salvage value at the end of total life of the DG i.e. 10yrs. Operation cost includes total diesel consumption per year and is calculated by multiplying diesel consumption per hour (@ 3ltr/hr) with total hours of operation and with economic cost of diesel (@ Rs30/ltr). The maintenance cost @ of Rs 10,000 per year for a DG set is signed as an AMC during the commissioning stage with the DG set supplier. The rent given by the telecoms tower operators for the land is @ of Rs 2,000 per month (This cost is common for both urban and rural area towers).

The idea is to power the BTS with solar electricity. The BTS is a 48V DC requirement, 25Amps per BTS (On an average 3BTS per tower, which amounts to 75Amps peak current requirement for CDMA Technology) or 10Amps per BTS (On an average 6BTS per tower, which amounts to 60Amps peak current requirement for GSM Technology). 2 Air Conditioners whose capacity is 1.5tons (1000W) each has to be supported by the system. There are LED lights for illuminating the shelter room with an overall space constraint to 60 X 60.