Energetica India Magazine March - April 2026

Designing efficient cable systems in the Indian context presents unique challenges. High ambient temperatures, often exceeding 45°C, combined with dusty and harsh environmental conditions, can significantly affect cable performance and longevity. Reducing energy losses in solar plants requires looking beyond panels and inverters to the often-overlooked bal- ance-of-system components, particular- ly cable design. As India’s solar sector expands rapidly with large utility-scale parks and commercial and industrial (C&I) installations, even small ineffi - ciencies can have a significant long-term impact. In large solar plants, marginal losses in energy transmission can trans- late into substantial reductions in overall output and revenue over a 25-year lifecy- cle. For instance, even a 0.5 percent re- duction in cable losses in a 100 MW plant can result in up to 1 million additional units of electricity generated annually, highlighting the importance of optimis- ation at every level. Energy generated at the module level must travel through extensive DC and AC cable networks before reaching the grid. During this transmission, resistive losses convert a portion of usable electri- cal energy into heat, leading to reduced net energy export, lower inverter effi - ciency, and increased thermal stress on system components, which in turn raises maintenance requirements. Although typical cable losses range be- tween 0.5 percent and 2 percent, their cumulative financial impact over time is considerable, making them a critical fac- tor in plant performance. Designing efficient cable systems in the Indian context presents unique chal- lenges. High ambient temperatures, often exceeding 45°C, combined with dusty and harsh environmental con- ditions, can significantly affect cable performance and longevity. Additional- ly, large solar parks require long cable routes, further increasing the potential for losses. These technical challenges are compounded by a cost-sensitive Engi- neering, Procurement, and Construction (EPC) environment, where minimising upfront expenses often takes precedence. As a result, optimising cable sizing and ensuring proper thermal management become essential to achieving long-term efficiency. Optimised cable design can be achieved through several key strategies. Select- ing the right cable size is crucial, as larger cross-sectional areas help reduce resistance and associated losses. How- ever, this must be balanced against ini- tial investment costs, shifting the focus from rule-of-thumb approaches to more comprehensive levelised cost of energy (LCOE)-based design decisions. Another important approach is the transition to 1500V systems, which allow lower cur- rent for the same power output, thereby reducing losses and overall cable require- ments. This trend is increasingly being adopted in utility-scale solar projects. Furthermore, efficient layout and rout - ing play a vital role; minimising cable lengths through smart design, optimis- ing the placement of inverters and pool- ing stations, and leveraging simulation tools can significantly enhance overall system efficiency. Ultimately, cable optimisation should not be viewed merely as a cost factor but as a strategic, long-term investment in maximising energy yield. As India moves toward ambitious renewable en- ergy targets, the focus must evolve from simply adding capacity to improving the efficiency and performance of existing and future installations. Small design improvements in areas like cable opti- misation can deliver disproportionately large benefits, reinforcing the idea that even minor enhancements can drive ma- jor gains in solar plant productivity. Reducing Energy Losses in Solar Plants Through Optimised Cable Design SOLAR CABLES 53 energetica INDIA- Mar-Apr_2026 Rajan Saspara CEO Anand E-Beam Cables India Ltd.