S4GA - Helipad and Airport Lighting Company
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Croatian Domestic Airport tested S4GA Solar AGL prior to Permanent Installation

Like other airports, Croatian Airport representatives have been concerned with will this light work for as long as they need it when they need it:

  • What if there are 2 weeks of cloudy weather?
  • What if there are 7 days of rain?
  • Will this stop or will it keep operating?

To check it, Croatian Airport representatives decided to join S4GA FREE Trial Program!

feasibility study

Firstly, we researched data regarding the safe number of hours per day that the solar airfield lighting can be activated at the selected intensity level. If the solar AGL system is operated for no more than the specified simulated hours, it can function without any disruptions caused by power outages or drained batteries. See the number of daily operating hours depending on intensity level and month below.

The  Feasibility Study utilized the PVGIS system, which is an EU-approved online tool that employs satellite-based solar historical data to simulate the performance of solar-powered equipment in a specific location!

On-site testing

During the trial period from 14.04.2023 to 22.05.2023, the weather was unfavorable, with intermittent rain and cloudy skies (the average level of cloud cover was more than 60%). Despite this, the S4GA Solar Airfield Lighting managed to operate smoothly, providing the necessary lighting to ensure safe landings and take-offs.

During S4GA FREE Trial in Croatia, all lights have been tested for 38 days. As you can see on the graph, the lights worked 24 hours per day, and the battery level never dropped below 71%. 

During the S4GA FREE Trial, the battery level of every light is monitored. Reading of battery level is collected every hour and sent to S4GA Monitoring Portal. Daily battery level is calculated as an average of hourly readings. As expected, the lights discharged faster at night since solar power wasn’t enough. However, despite the cloudy weather, the lights charged up to 100% during the daytime.


Despite adverse weather conditions, the solar-powered airfield lighting proved to be highly functional and allowed the airport to operate at full capacity. Furthermore, the easy installation and low maintenance requirements make this solution highly suitable for regional airports!

  • All lights have successfully passed the solar autonomy test;
  • All lights have exceeded the maximum simulated duration: The average daily time when the light was activated was 24 hrs/day
  • 99% of the time lights were activated at 100% intensity level

The results of the S4GA FREE Trial Program were so incredible that Croatian Airport Representatives decided to install it at their airport as a permanent solution. Therefore, we are currently in the manufacturing phase before installation!

would you like to join S4GA FREE TRIAL PROGRAM?

Enroll in the S4GA free trial program today to explore a sustainable, dependable solution to power your airfield lighting. With our advanced solar-powered lighting systems, you can guarantee seamless operations and enhance safety for pilots.

Participating in this program allows you to experience our technology firsthand and witness the results for yourself. Don’t let go of this chance to transform your airport’s lighting system. Register now and discover the advantages of solar autonomy!

Register Now



S4GA FREE Trial Program