Sun is out. Your rooftop solar system is generating at full tilt. Your energy bill looks great on paper. And then evening shift starts. The sun dips. Suddenly, you're back to pulling expensive grid power or firing up diesel genset just to keep production lines running. Sound familiar? This is exactly why BESS rooftop solar has become one of the most talked-about upgrades among industrial energy buyers this year. That gap between generating power and having power when you actu