Powerack have two flat roof ballast systems for you to choose from.If you don’t know how to choose,take a look at their advantages.
1. There is no need to use expansion bolts or chemical bolts on the roof, no damage to roof;
2. The system connects all the panels with the rails into a whole;
3. East-west facing panels have a great effect on resisting wind loads;
4. A combination of high quality aluminium components make a robust, reliable system and quick and easy installation;
5. Maximized roof space utilized, and PV quantity installed.
Differences advantages:
Ballasted A:Two solar panels share the same front legs and rear legs, making installation more convenient and also the cost will more cheaper.