Energy · Barcelona, Spain · Founded 2020
One Solar (now rebranded as One Hub Energy) is a Barcelona-based energy adviser and technology company that combines project advisory for PV and BESS with proprietary digital tools (e.g., OneBESS, OneFlex) to model, value and operate renewable and storage assets. The firm says it supports IPPs, utilities and investors across the full lifecycle — from origination and development to optimized operation — and lists major clients/partners and sector names on its site. In 2024–2025 the company announced a strategic investment/stake acquisition by Octopus Energy Generation’s Sky fund to accelerate its digital solutions in Spain. The team was founded by experienced energy professionals (the site cites Eduardo Aguilar and Joaquim Palau) and highlights ties to senior ex-industry figures, positioning the company at the intersection of consulting and software for grid-scale storage and hybrid projects.