Unavailability of solar radiation during rough weather and night time usually makes it difficult to make or store power in order to deal with power outages. The solution to this problem can be an off grid solar system or stand-alone system. This system balances the mismatch between the electrical load and the electricity produced, and the power is supplied as per the application requirement (DC Load or AC Load), with the help of some energy storage devices like batteries. These off-grid solar systems are usually suited for rooftops of small homes, offices, malls, hospitals and such establishments. A small solar panel of 1 KW for a home power plant is adequate to drive a load of approximately 300 watts for four hours with a small battery bank, depending on solar irradiation in the area. The solar panels for homes, office and such establishments directly convert solar energy to electrical energy. This can be used immediately to drive loads or stored in batteries for usage at time of power outages.
The Residential solar energy system does not require maintenance; regular cleaning of modules can keep the system up and running.
The biggest challenge in implementing government policies and other development programs in rural areas and homes is lack of infrastructure. Many areas are still not connected to the grid. The only answer to the problem is decentralization of power generation. This is where Off Grid solar energy systems can play a major role. The areas where siddhi solar aims to provide Off Grid Solar System include:
- Small rural bank branches
- ATMs /information kiosks
- Educational institutes
- Health clinics
- Telecom infrastructure
- Small solar PV power plants that can be installed at the user end.
Rural Banking/ATM / Information Kiosks
Rural banks usually have a small power load compared to large urban branches but power supply to these branches is a major challenge. Most branches depend on difficult-to-maintain diesel genets, which add to their operational expenditure. Small solar plants can help in lighting up these branches. Electric machines and service centres such as ATMs and information kiosks need 24×7 power. The use of small solar power plants will decrease the use of generators.
It is crucial that medical equipment like incubators, refrigerators and X-ray and ECG machines always remain operational. Solar power plants make it possible to provide these facilities even in health centres with continuous power.
Often, educational institutes in remote areas are not connected to the power grid. In such cases, solar PV plants can be used to run computers, fans and lights.
The telecom industry is one of the largest consumers of diesel, which is used to run generators. Installing solar systems for telecom applications as well as BTSs can go a long way in saving on diesel.
Solar PV can be utilised for lighting up railway platforms even in the remotest of areas, and for signalling and other electric installations.
Government Support for Decentralized Solar PV Systems
As a way to encourage more people to adopt solar power generation, the government is providing huge subsidies in capital and interest rates.
Capital subsidy of about 30 per cent is given on the overall project cost, while interest is being provided at a subsidised rate of 5 per cent through banks and financial institutions. In states such as Sikkim, Jammu and Kashmir, Himachal Pradesh, Uttarakhand and North-East states, capital subsidy goes up to 90 per cent.
Other than this, the government has also provided accelerated depreciation benefit of 80 per cent in the first year of installation.