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As the costs of solar PV continuously decrease and pollution legislation imposes less burning of agricultural residues, decentralized renewable energy is increasingly affordable for providing electricity to one billion people lacking access to a power grid. This paper presents a techno-economic feasibility case study of biomass gasification in off-grid and grid-connected mini-grids for community-scale energy application in rural Uttar Pradesh, India. Energy demand data was collected through surveys in a village with irrigation and agro-processing loads and off-grid households and used to construct a seasonal load profile based on statistical methods. This was used to simulate single-source and hybrid mini-grids based on solar PV, biomass gasification and diesel generation using HOMER Pro. Hybrid PV-biomass or PV-diesel systems were found to offer the highest reliability for off-grid power at the lowest cost. Single-source PV was cheaper than biomass gasification, though the cost of electricity is highly sensitive to biomass supply and gasifier maintenance. Both renewable options were around half the cost of diesel generation. The findings held across grid-connected systems with weak, moderate and strong reliability of grid supply. This suggests that biomass gasification-based mini-grids are not cost-competitive with PV unless the two generation sources are combined in a hybrid system, though they require operational testing prior to implementation. Image 1 • Hybrid PV–biomass or PV–diesel systems offer higher reliability at lower cost. • PV is cheaper than biomass gasification mini-grids for productive energy provision. • Grid-connected PV offers lowest LCOE over 20 years for strong and weak grid supply. • LCOE of biomass systems is highly sensitive to biomass requirement and maintenance. • PV–biomass systems appear resilient to operating parameters but lack field testing. [ABSTRACT FROM AUTHOR]

Solar lamps are a quick, affordable, and effective way to provide basic lighting for households in rural areas of developing countries. However, implementers and researchers argue that the market for solar products is hampered by a lack of awareness and willingness to pay (WTP) for solar technology. In this paper, we investigate awareness of solar products, household motivation to adopt solar technology, household perception of solar lamps when compared to kerosene-based lighting devices, and lastly, the availability of electricity after dark. We analyzed a repeated-measures (longitudinal) data of 1159 rural households in energy-poor villages in the states of Bihar, Jharkhand, and Uttar Pradesh, India. Longitudinal logistic regression analyses were performed to study how various factors influence users WTP for solar lamps at Indian market price (~8.61 US$) over time. We find that households awareness of various solar products and their motivation to adopt solar technology has increased over time but there is much room to grow awareness in Bihar, Jharkhand and Uttar Pradesh, especially for solar home systems and solar water pumps. Our model predicted that the households WTP for solar lamps at the market price increased with high income but it is significantly moderated by their level of awareness of solar products and their motivation to adopt solar technology. These findings suggest that increasing awareness of solar products through various dissemination programs leading to significant interest in solar products among people which in turn may enhance their WTP for solar products. • Repeated-measures (longitudinal) data of 1159 rural households in energy-poor villages in India were analyzed. • This study determines factors that influence the households willingness to pay (WTP) for solar lamps in rural India. • Awareness of solar products coupled with motivation to adopt solar technology significantly raise the probability of WTP. • WTP for solar lamps at the market price increases with income. • Awareness of solar products through various programs lead to significant interest in solar energy products among people. [ABSTRACT FROM AUTHOR]