#cost-analysis

The evidence is a 9 cm² panel run for ~9 hours outdoors and a lab unit run for 7 days. Real deployment needs square-metre panels surviving years of seawater: aluminium corrosion, biofouling, laser-texture wear, mechanical robustness, and field salt-harvesting are all untested.

The levers that make the refill model profitable (route-density engineering, cutoff batching, automation) are the same ones that cut labour per delivery. Higher operator profit and many stable jobs cannot both be maximised, so job creation must be a deliberate, costed choice.

The hotels-first plan assumes a home-refill business grows naturally out of the B2B phase, but they differ in product, sales motion, margins and logistics. Direct-to-consumer also reintroduces the dispersed-household friction the hotel approach was specifically chosen to avoid.

The closed-loop swap shifts reverse-logistics cost onto the operator, who must collect, sanitise and refill containers. Whether the model beats plastic rests on the measured per-cycle cleaning cost (water, energy, detergent, wear, reject rate) and the number of reuse cycles.