There are a significant number of benefits to installing a Solar electric (PV) power solution: 

Clean Power
Solar is a zero emission energy source; including both pollutants and noise.  This makes it the most environmentally sound energy source

Cost Effective
Solar offers long term savings on energy bills and is cost efficient when analyzed on a cost per kilowatt hour (kWh) delivered basis

Deployment Flexibility
Solar offers modularity at any scale which makes it ideal for on-site locations; it can be scaled to meet a broad range of project requirements

Long Useful Life and Minimal Maintenance
Solar panels typically last up to 30 years and have manufacturers guarantees of 25+ years.  Solar power systems have few, if any moving parts and once installed, require very little ongoing maintenance; they typically need washing to remove dust every few months

Peak Power at Peak Demand
Solar panels generate peak power when demand is at its highest and power is at its most expensive, which in most locations is midday

On-Site Distribution Capabilities
Solar installations offer partial protection against grid failure, particularly if (battery) storage capacity is also located on site