Solar Pumped Storage
Subcategory (under Clean Energy): Storage
Technology Readiness Level (TRL): TRL 8 - TRL 5 - Large prototype
Technology Outline (Process Description)
In rural hilly areas of India, access to electricity is a challenge due to adverse weather conditions that disrupt electricity distribution infrastructure. While Run of River (RoR) based Micro Hydro Powerplants (MHP) operate in many remote villages during the monsoon season, they remain non-operational during summers when streams dry up. To address this problem, a team comprising of Academics, scientists and engineers from Visva-Bharati (A Central University) and NB Institute for Rural Technology implemented an innovative Solar pumped storage project at a remote village in Manipur, which included a 12kW Micro Hydro integrated with a 40kW Solar Pumping system and an Upper and Lower reservoir. By constructing upper and lower reservoirs and using a smart solar pumping system, stable round-the-year power generation was achieved. This has improved the lifestyle of beneficiaries, allowing them to increase their income by operating industrial food processors and tailoring equipment, previously not possible. This project has thus developed a sustainable power generation and storage system, which can improve the PLF of existing RoR based MHP plants, replace battery-based energy storage systems, and store solar energy economically and effectively.
Salient Features/Advantages
Micro Solar Pumped Storage technology, a cost-effective energy storage alternative, can be integrated with existing hydel systems to enhance efficiency. It offers an affordable Levelized Cost of Electricity (LCOE) of $0.19 per kWh, facilitating rural implementation. Its operational versatility allows use in grid-connected or standalone modes, and it efficiently stores Solar PV power in areas with low grid availability. It also allows for customizable reservoir construction based on site conditions and storage needs.
Key Outcomes
The project successfully integrated solar pumped storage technology into an existing RoR-based MHP power plant, resulting in a 22% reduction in LPSP and increased PLF. By utilizing upper and lower reservoirs and a solar pumping system, the system converted solar energy into potential energy, eliminating the need for battery storage and providing stable power year-round. The solar pumped storage system expects lifetime of 50 years and LCOE of approximately $0.19/ kWh. It also showcased the potential for retrofitting into dam- based hydroelectric plants to boost PLF and power quality.
IP Protection details
- Patent filed (Title, national/International): Nil
- Patents Granted: Nil
- Copyrights obtained /progress on commercialisation /Pl. specify connect with industry: Nil
Contact details (for more information)
- Nodal Person name: Prof.S.P GonChaudhuri
- Email ID: nbirt2012@gmail.com
- Organisation name (Relevant link/web page): NB Institute for Rural Technology (NBIRT) & Visva-Bharati University
Supporting Photographs/Images

Organizations involved in the development (logo/name) Visva Bharati, Santiniketan, West Bengal NB Institute for Rural Technology (NBIRT), Kolkata, West Bengal FEEDS, Manipur |