A Practical Business Guide for 2026 Running a business has never been cheap. Energy prices wobble. Overheads creep. Margins get squeezed from all sides. Commercial solar panels are one of the few upgrades that flip that script. They cut costs, stabilise energy spend and quietly pay for themselves while you get on with running the business. This guide explains how commercial solar works in the UK, what it costs, what you can save and whether it makes sense for your building.