Deger Solar Installation- Safe Mode
Ive installed many deger tracking systems in the past, but I'm at a bit of a standstill with this new one. The new Energy Control Box (ECB) has two terminals for a " safe " mode. When the power goes out, its usually storming, so they've integrated a safe mode, where the panels will tabletop. You need to provide 21V DC to the two terminals when hydro is out.
I have a UPS that supplies 120V AC to the Central Control Box (CCB) when the power goes out. The UPS is wired up so its plugged into a receptacle coming from the panel. The panel feeds the male cord end which plugs into the UPS and the UPS is plugged into the rec. This way, the CCB always receives 120v ac.
What is the best way to provide 21 vdc to the safe terminals in the most economical fashion. What have you guys encountered?