Modelling and multi-objective optimisation of sustainable solar-biomass-based hydrogen and electricity co-supply hub using metaheuristic-TOPSIS approach

•Green hydrogen production from biomass fermentation and solar-powered electrolysis.•Optimisation of HECH capacity configuration with supply–demand variations.•Optimal HECH exhibits a total annualised cost of USD 9.43 mil./yr.•Minimised probability of hydrogen and electricity supply loss to 0.188 and 0.328.•Concurrently reduced probability of potential waste energy generation to 0.09.