The £225,000 installation - the work for which was carried out by Cheltenham-based solar panel expert Mypower - is helping the Evesham-based mushroom grower to both reduce its carbon emissions and cut down its electricity bill.
Walsh Mushrooms chairman Alan Walsh said: "Our solar investment will help us to avoid over 90 tonnes of carbon emissions each year which is part of our on-going group wide policy to deliver a sustainable product to customers, something we are very passionate about."
The 248KWp system is producing 20 per cent of the depot's annual energy use - equating to 213 kwh of electricity.
The panels will also last for 25 years and, in just over five years' time, the system will have paid for itself. The business will also benefit from the government's Feed-in Tariff scheme for 20 years and should expect a return on investment of 15 per cent or more.
Meanwhile, Walsh Mushrooms is set to install another set of solar panels onto a new building that it is in the process of constructing.