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Enhancing EV charging in Nepal: Strategic sizing and placement of solar – Powered battery system in Byasi Feeder

Author

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  • Giri, Tilak
  • Paneru, Biplov
  • Bhattarai, Nawraj
  • Chaudhary, Jeetendra
  • Paneru, Bishwash
  • Poudyal, Ramhari

Abstract

The rapid adoption of electric vehicles (EVs) globally demands expanded charging infrastructure; however, their unplanned integration into radial distribution systems (RDS) often causes voltage instability, high power losses, and system inefficiencies. This study optimizes the placement and sizing of solar photovoltaic-battery system (PV-BESS) in Nepal's 30-bus Byasi feeder to mitigate these issues. Employing particle swarm optimization (PSO) and MATLAB/Simulink, the proposed approach reduces active power loss by 56.18 % (477 kW–209 kW) and improves minimum bus voltage by 2.57 % (0.9404–0.9646 p.u.) through integration of 2576 kW PV and 1311 kW BESS. The application of novel energy management strategy further curtails peak demand by 38.3 % (3700 kW–2283 kW). The solution achieves financial viability with approximately 9-year payback period. This research pioneers a comprehensive technical-operational-economic assessment for EV charging-oriented PV-BESS planning in Nepal's RDS, demonstrating how weighted multi-objective optimization balances power loss reduction and voltage improvement while ensuring economic feasibility. The findings provide a replicable framework for sustainable EV infrastructure development in similar distribution networks, highlighting the critical importance of strategic renewable energy integration for grid stability. The study's methodology and results offer valuable insights for utilities and policymakers addressing EV charging infrastructures challenges in developing power systems.

Suggested Citation

  • Giri, Tilak & Paneru, Biplov & Bhattarai, Nawraj & Chaudhary, Jeetendra & Paneru, Bishwash & Poudyal, Ramhari, 2026. "Enhancing EV charging in Nepal: Strategic sizing and placement of solar – Powered battery system in Byasi Feeder," Renewable Energy, Elsevier, vol. 256(PD).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pd:s0960148125018099
    DOI: 10.1016/j.renene.2025.124145
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