Scientific evidence suggests that man-made air and water pollution is leading to climate change, which in turn is creating hazard for the entire biodiversity. On the other hand, electricity shortage is plaguing development of India. The challenge is to have clean environment and a sustainable economy. Government has recognized the opportunity to move towards a sustainable future through implementation of solar energy by Jawaharlal Nehru National Solar Mission (JNNSM).
Government is providing the following incentives to make your investment attractive –
- For domestic applications, you can avail 15% subsidy.
- For industrial and commercial applications, you can avail 30% accelerated depreciation.
ESCOMs pay the following tariff for the rooftop solar energy :
| Capacity of Solar Rooftop power plants |
Tariff in Rs./unit (Without Subsidy) |
Tariff in Rs./unit (With Subsidy) |
Rooftop area required |
| 1 to 10kW | 7.08 | 6.03 | 100 to 1,000 Sq. ft |
| Above 10kW & upto 50kW | 6.61 | 5.63 | 1,000 to 5,000 Sq. ft |
| Above 50kW & upto 100kW | 6.14 | 5.23 | 5,000 to 10,000 Sq. ft |
| Above 100kW & upto 500kW | 5.67 | 4.83 | 10,000 to 50,000 Sq. ft |
| Above 500kW & upto 1000kW | 5.20 | 4.43 | 50,000 to 1,00,000 Sq. ft |
Gross metering for Domestic, Hospital and Educational institution – Consumers are allowed to sell entire energy generated by their solar rooftop to the ESCOMs irrespective of their self-consumption. Consumers have to pay their electricity bill as usual and get paid by ESCOMs for the entire electricity generated.
Net-metering for Industrial, Commercial and all categories of consumers are allowed to sell surplus energy generated by their solar rooftop and small PV plants to the ESCOMs after self-consumption. Consumers will be paid only for the net access energy supplied to the grid.
This is a right time to invest in solar energy as the Commission has decided to allow an capacity addition of only 400 MW by all the ESCOMs in Karnataka State till 31st March 2018.
The price depends on the type of plant and scope of work. Your house is unique. We will do a site survey before we quote a firm price.
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The general payback period is less than 7 years.
Alternating Current (AC) is used for most of the domestic applications (fan, light, TV, etc.). The Direct Current (DC) produced by solar modules is converted to AC current by the inverter. When the solar module produces less than the consumption in the house, inverter takes the difference in electricity from the grid and when modules produce more than the consumption, inverter supply the extra electricity to the grid.
Plant has lifetime of more than 25 years. As per MNRE guideline, PV modules used in solar power plants/systems is warranted for their output peak watt capacity, which should not be less than 90% at the end of 10 years and 80% at the end of 25 years.
Plant has an overall lifetime of more than 25 years. However, Inverters and batteries are expected to have a life of about 7 years. They may need replacement once their life ends.
For domestic purposes, the type of connection depends on the shade free rooftop area available for installation. However, generally it is recommended to have a battery backup for 2 hours and along with grid connected solar power plant. This ensures power backup during power cut situation and also ensures revenue from MESCOM.
For hospitals, battery based off grid connections are suitable to ensure seamless power supply at all times.
For commercial and industrial applications, the rooftop plant size is limited to 1.5 times the sanctioned load. Both off-grid and grid connected solar power plants are suitable for such applications. Depending on your circumstance, we will design the plant and give our recommendations.
On grid limitations for LT consumers – Consumers can install 1.5 times the sanctioned load for on grid connection. However, a maximum of 5 kW is allowed for single phase LT connection and a maximum of 50 kW is allowed for 3 phase LT connection. This is applicable for both gross and net metering based customers. For off-grid connection, there is no installation limitations.
PPA is Power Purchase Agreement. It is the agreement between you and MESCOM for the purchase of electricity produced by the plant for 25 years. The price agreed in the PPA does not change for 25 years.