Illuminated Signs: Renewable energy for the sign industry

Wind power
Small wind-powered electrical generators are also an effective means for producing renewable energy for illuminated signs. Similar to solar power systems, they use their natural source of energy to supply electricity to a battery, which in turn powers the signs. Unlike solar panels, they can be co-ordinated to match the sign’s colour(s), as part of the structure.

Wind turbines can be combined with a solar panel for a ‘hybrid’ system.

Hybrid systems
In some cases, wind-powered electrical generators and solar-powered systems are combined to produce a greater amount of energy than would be possible individually. Termed ‘hybrid systems,’ their other advantage is they can more effectively be used throughout the year, regardless of changing weather conditions. On an overcast day, the wind turbines are used, while on a sunny day, the solar panels take over. And on days that are both sunny and windy, these systems can generate power around the clock.

These systems are a particularly strong option for powering signs, which are often installed in areas and at elevations prone to all sorts of weather throughout the year. They can even be used to power up a sign that needs to be illuminated 24-7.

System components
Solar and wind power systems are relatively similar. Typically, in addition to the solar panel or wind turbine, they both require a power management controller/charger, batteries packaged in a box (i.e. to shield them against damaging weather conditions) and special cables and connectors.

Given they are inherently designed—like most signs—for outdoor use, these systems will operate efficiently across extreme temperature ranges, from -29 to 60 C (-20 to 140 F). Where the sign industry may need to pay more consideration is the size of the components. Smaller solar panels and wind turbines are available today, so their presence will not visually overpower or divert attention away from the message of the sign.

Benefits of renewable energy
While renewable energy has, to date, typically been adopted out of consideration for the environment, it also offers signmakers other benefits over conventional methods of energy production.

For one thing, because electricity is generated right at the sign site, there is no need for complicated electrical wiring in the field, trenching or hiring a licensed electrician to manage the work. As a result, installation costs are reduced, more flexible system placement becomes possible and the permit application process is shortened. It will also be easier to handle maintenance and other servicing of the sign over the long term.

There are other types of advantages, too. For example, a sign shop may be able to expand its business into custom manufacturing of municipal parking lot streetlights and other systems where renewable energy is favoured. Also, the costs of purchasing and installing solar or wind power systems may be deducted from tax bills, depending on the applicable federal, provincial and/or municipal regulations.